ASTi AST52 Industrial Smart Digital HiQDT Conductivity Sensors Installation Guide
- June 3, 2024
- asti
Table of Contents
AST52 Industrial Smart Digital HiQDT Conductivity Sensors
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
Industrial Smart Digital HiQDT Conductivity Sensors to Directly Interface to
ANY RS-485 MODBUS RTU Controller
The AST52, AST41 and AST50 sensors shown to left in standard configuration
without waterproofing option installed.
Sensors are available for all possible installation types including inline,
immersion, submersible, sanitary and HOT-TAP valve retractable schemes.
Electrical Conductivity (EC) Units Measured o microSiemens/cm (µS/cm) or o milliSiemens/cm (mS/cm)
Shown below is handheld communicator (HHC) automatically detecting that a conductivity sensor has been connected.
Conductivity Units Computed o Salinity (PSU) o Total Dissolved Solids (TDS) in
ppm
§ NaCl, KCl and TDS 442 o MegaOhms (MW)
§ Both linear or special ultrapure water (UPW) non-linear automatic
temperature compensation (ATC) are available
Other Available Measurements with HiQDT Sensors o pH & ORP o Dissolved Oxygen (D.O.) o Ion Selective (ISE)
Shown to left is AST41 sensor with WPIT sealing and braid-reinforced sealing
hose factory installed to make sensor suitable for use in outdoor
installations with moisture, rain as well as washdowns.
Alternate waterproofing sealing options are available for fully submersible
use even when an immersion rod or standpipe is not used for installation.
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM
Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
Smart MODBUS Conductivity Sensors with Integral Calibration, Intelligent
Analytics, Predictive Maintenance for Plug & Plug Hot-Swap Operation in
Continuous Field Measurements
INSTALLATION STYLES:
· Inline · Immersion · Submersible · Sanitary · HOT-TAP Valve Retractable ·
Special installation styles are available upon request as
special order configurations (inquire to factory)
CELL CONSTANTS
· Anywhere from K=0.01/cm up to K=20.0/cm
MEASURING RANGES
· Down to Ultrapure Water ( 0-2 µS/cm | 0-18.2 MW ) · Up to 2,000,000 µS/cm (
2,000 mS/cm ) · Computed Salinity up to 50.000 PSU · Computed Total Dissolved
Solids (TDS) to 100,000 ppm · Computed Resistivity in MW with UPW ATC curve
OPERATING MODES:
· Standard Range & High Range Modes o Can toggle between standard and high
range mode while sensor is in use as most appropriate for sample for best
resolution and scaling
· Ultralow Range Mode o With special UPW temperature compensation
UNIQUE FEATURES
· Sensors are supplied precalibrated with certificate ready for immediate
field commissioning upon arrival
· Auto configuration of cell constant & range mode for controllers supplied
with smart conductivity sensors
· Time since calibration last performed can be used for predictive maintenance
to ensure accurate field readings
· Separate span gain calibrations for standard & high range modes for best
reading in any operating mode
MATERIALS OF CONSTRUCTION
· Electrodes: o 316SS, Titanium, Hastelloy C-276, Monel
· Insulators: o CPVC, TEFLON (PTFE), KYNAR (PVDF), PEEK
· “O”-Rings: o EPDM & EPR, VITON, AFLAS, KALREZ
· Compression Fittings: o 316SS, KYNAR (PVDF), PolyPropylene (PP)
SPECIFICATIONS
· Up to 500 psig · Up to 205 °C for Inline, Sanitary & HOT-TAP Use · Up to 85
°C for Submersible Installations · Process Connections:
o Inline from ½”MNPT up to 1″MNPT o Sanitary from ¾” to 2½” TRI-CLOVER Flange
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
Smart Digital HiQDT Conductivity Measurement System
CLICK HERE for complete webpage on SMART DIGITAL HiQDT MODBUS RTU MEASUREMENT
SYSTEM for core information that is shared for all measurement types and
details on the ASTI supplied PLC & HMI packages for turn-ready commissioning.
See installation guide for additional details & information. IMPORTANT NOTE:
Smart Digital HiQDT sensors are always RS485 MODBUS RTU slaves. Only ONE of
the RS485 MODBUS RTU master devices detailed above can be connected at any one
time. Core Structure of HiQDT RS485 MODBUS RTU Smart Digital Sensors Installed
into Field Service · Programmable Logic Controller (PLC)
o Human Machine Interface (HMI) can be either local or else available via
remote access o All PLC & HMI functionality shown above is included ASTI
touchscreen controllers o PLC & HMI can be either customer supplied or ASTI
provided as desired.
§ See modbus implementation guide if sensors will be interfaced to customer
PLC · Windows Software for Setup, Configuration & Calibration of HiQDT sensors
o Search & assign sensor node address & baudrate (HHC can also search and
assign node address) o Configure & calibrate sensors; Save setup to
configuration file and produce calibration certificate o Windows Datalogging &
Graphing software records pH, ORP, D.O. ppm & % saturation, ISE ppm,
Conductivity µS/cm, Salinity (PSU), TDS and Resistivity (MW) and °C from
connected sensors · Handheld Communicator (HHC)
o 9V battery powered operation with simple easy to use 4 button operation with
bright LED o Configure and calibrate sensors as well as performing spot
measurement on field samples o Ready for plug & play use right out of the box
with zero configuration required Advanced Sensor Technologies, Inc. U.S.A.
Website: www.astisensor.com IOTRONTM Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
Industrial Internet of Things (IIoT)
The core difference of the HiQDT smart digital sensors is that all user
functionality is accessible via the open standard and royalty free RS-485
MODBUS RTU protocol. This is in contrast to the now antiquated sensors and
transmitters that only provide a 0-20mA or 4-20mA current loop or 0-5 or 0-10
VDC voltage output containing no diagnostic information whatsoever. The modern
HiQDT smart digital sensors take advantage of the industrial internet of
things (IIoT) where remote access to all information is available from the
sensor in real-time allowing for advanced predictive maintenance and support
including remote calibrations and troubleshooting. HiQDT smart digital sensors
create an open and collaborative environment for process automation and liquid
analytical monitoring enabling a level of connectivity and integration that is
not possible with closed architectures such as HART, Profibus, Fieldbus and
other proprietary platforms that force vendor lock-in to the client.
Detailed complete documentation is available for the HiQDT smart digital
sensors to allow access to all of the user adjustable configuration
parameters, analytic data & calibration functions and values as well as
sending the engineered temperature compensated process pH & ORP values in very
high resolution. Analytics allow for predictive analytics to schedule
maintenance in a proactive manner as well as robust monitoring of the process
no matter the control system that is currently employed at the given facility.
This HiQDT platform gives customers the freedom to interface these sensors
with any PLC of their choice so long as it can act as a RS-485 MODBUS RTU
master. Support for RS-485 MODBUS RTU master mode on PLC now is very common,
if not altogether standard, even for entry level PLC, many of which are also
now available with cost-effective remote ethernet access options.
Significance of HiQDT Platform in the Field
The major paradigm shift of the HiQDT smart digital MODBUS sensors and the
Industrial Internet of Things (IIoT) means that not only process values can be
viewed remotely but ALL functionality that is possible locally standing in
front of the HiQDT controller can also be accomplished remotely with robust
security and administration for access control. That means fewer trips out in
the field to assist clients with commissioning or troubleshooting for any
issue that is simply a matter of configuring software or setting controller
options. All of these types of changes can be made remotely with the HiQDT
platform building upon the power of the Industrial Internet of Things (IIoT)
and accessibility through wired and wireless networks from a Windows PC as
well as cellular connected iOS and Android smartphones and tablets. The
ability to send email notifications upon any type of trigger event such as
reaching a user defined min or max threshold setpoints for the process or
temperature reading as well as fault conditions such as loss of communication
with sensor mean excellent field maintenance & support even when site is not
open to receiving outside visits due to the pandemic.
Typical Field Usage of Smart Digital HiQDT MODBUS RTU Conductivity Sensors
The smart digital HiQDT conductivity sensors with integral MODBUS RTU
communications allows for simple & fully portable installation scheme. Sensor
may be calibrated anywhere (lab, shop or field) and interfaced with any data
acquisition or control system in the field via the RS-485 MODBUS RTU
communications. The temperature offset and process value offset calibrations
can be done with sensor left in service to agree with a reference value from
an external measurement device (please see calibration instructions for
details). Waterproof & corrosion-resistant NEMA6P rated HiQ4M snap connector
are standard for easy seamless hot-swap of sensors from service for cleaning,
recalibration and other maintenance tasks as may be required as well as
eventual replacement of sensor in time.
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM
Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
BENEFITS OF SMART DIGITAL HiQDT MODBUS RTU CONDUCTIVITY SENSORS
· Integral RS-485 MODBUS RTU interfaces all-modern PLC controllers & data
acquisition systems. · Communicator provides easy management of field
installations without the cost of a mating transmitter.
This is ideal for locations where a local display is not necessary or possible
due to installation limitations. · Intelligent management of sensor
calibrations and service life-cycle for efficient commissioning &
maintenance. All aspects of installation are completely portable from the shop
to the field site location. · Days in use value is stamped for calibrations
that are performed. This allows for predictive scheduling of
maintenance in the PLC to ensure the accurate measurement in the field based
upon user defined criteria. · All digital sensors ensure reliable operation
even in noisy process environments unlike analog sensors. · No degradation in
digital output even with very long cable runs up to max of 1,000 meters (3,280
feet) · Bridging connections & modifying installations easily without loss of
signal quality with NEMA 6P & IP67
rated quick disconnect waterproof and corrosion-resistant dual snap connector.
Simple plug and play operation for intelligent maintenance planning & smart
management of sensor installations and stocking. · Low-cost snap digital
extension cables facilitate consolidation of very many HiQDT sensors outputs
into one panel enclosure where very many remote field installations can all be
conveniently all viewed at once. · Intelligent HiQDT handheld communicator
software identifies type of sensor connected & autoloads correct features.
There exists no possibility of accidentally using the wrong set of options or
settings. · All Extension cables for HiQDT sensors are inter-compatible.
Uniform extension cables minimize stocking. Separate field installation guide
details available options to commission & exchange sensors.
SENSORS FOR USE WITH SMART DIGITAL HiQDT WITH RS-485 MODBUS RTU OUTPUT
· Entire line of proven industrial inline, immersion, submersible, sanitary &
HOT-TAP valve retractable 2-electrode contacting conductivity are ALL
available in the smart digital HiQDT type configuration
· Waterproofing Option “A”, “B”, “C”, “G”, “H” or “IT” recommended for any
HiQDT smart digital sensor with integral RS-485 MODBUS RTU digital output when
used for fully submersible installations.
TECHNICAL SPECIFICATIONS FOR HiQDT DIGITAL SENSORS WITH RS-485
Mechanical & Thermal
Electrical
Housing: Mounting: Rating: Connector:
Max Cable: Temp.: Pressure: Weight: Dimensions:
Defined by Conductivity Model & Config Inline, Immersion, Submersible, HOT-TAP & Sanitary as per sensor installation scheme Fully submersible and waterproof without use of immersion tube with correct sealing option NEMA 6P rated HiQ4M male snap connector for HiQDT snap extension cables; Extension cables for 3TX- HiQ platform can also be used for HiQDT type smart digital sensors as well Up to 3,280 feet (1,000 meters) using 22 AWG leads when employing 12VDC power supply Inline max per sensor specs; Submersible Use limited to Max 85°C for all sensor models Up to 500 psig inline use for selected models Varies depending upon sensor type & config Minimum size is ½ ” MNPT for inline installations with AST10/AST51 Sensors; Minimum size is ¾” MNPT for HOT-TAP Valve Retractable Installations; Minimum size is ¾” TRI-CLOVER for Sanitary Installations
Operating VDC: Power Supply: Current draw: Conductivity Ranges: Temp Sensor:
Temp Range:
Temp. Comp.: Digital Output: Baud rate: Compatibility:
CE mark:
8.0 to 13.0 VDC at sensor board Isolated & Regulated 9V or 12V DC Max 35mA Absolute, Typical ~30mA See Tables for Available Range Modes for each Cell Constant Integral Platinum 1000 TC Element -40 to +210°C ±0.3°C (limited by actual sensor specifications) Max Temp is +85°C at sensor board (submersible) Automatic for all measurements Isolated RS-485 MODBUS RTU 9600 or 19,200 kbps (selectable) ASTI Handheld Communicator (HHC) or Windows HiQDT software or any PLC with isolated RS-485 input that can serve as a MODBUS RTU master to HiQDT sensor slave EN61326A
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
STANDARD RANGE MODE * – in microSiemens/cm
Range Scaling Factor
Cell Constant (K) 0.01 0.02 0.05 0.10 0.20 0.50 1.00 2.00 3.00 5.00 10.00
20.00
200 Max Raw Input Limit
200 400 1,000 2,000 4,000 10,000 20,000 40,000 60,000 100,000 200,000 400,000
Resolution 0.004 0.008 0.02 0.04 0.08 0.2 0.4 0.8 1.2 2 4 8
Max Temp. Compensated Conductivity using 2% per °C Coefficient
Lowest Recommended @ 25 °C
@ 75 °C
@ 125°C
Measurement @ 25°C
2
200
100
66.67
4
400
200
133.33
10
1,000
500
333.33
20
2,000
1,000
666.67
40
4,000
2,000
1,333.33
100
10,000
5,000
33,33.33
200
20,000
10,000
66,66.67
400
40,000
20,000
13,333.33
600
60,000
30,000
20,000.00
1,000
100,000
50,000
33,333.33
2,000
200,000
100,000
66,666.67
4,000
400,000
200,000
133,333.33
HIGH RANGE MODE * – in microSiemens/cm
Range Scaling Factor
2,000
Max Temp. Compensated Conductivity using 2% per °C Coefficient
Cell Constant (K)
Max Raw Input Limit
Resolution
Lowest Recommended Measurement @ 25°C
@ 25 °C to 75°C
@ 125°C
@ 175°C
0.01
2,000
0.04
20
1000
666.67
500
0.02
4,000
0.08
40
2,000
1,333.33
1,000
0.05
10,000
0.2
100
5,000
3,333.33
2,500
0.10
20,000
0.4
200
10,000
6,666.67
5,000
0.20
40,000
0.8
400
20,000
13,333.33
10,000
0.50
100,000
2
1,000
50,000
33,333.33
25,000
1.00
200,000
4
2,000
100,000
66,666.67
50,000
2.00
400,000
8
4,000
200,000
133,333.33
100,000
3.00
600,000
12
6,000
300,000
200,000.00
150,000
5.00
1,000,000
20
10,000
500,000
3333,33.33
250,000
10.00
2,000,000
40
20,000
1,000,000 666,666.67
500,000
20.00
4,000,000
80
40,000
2,000,000 1,333,333.33 1,000,000
- Sensor can toggle between standard/high range mode range mode while in use. Standard/high range mode sensor is one configuration and associated sensor board hardware. Ultralow range mode sensor is a different configuration and associated sensor board. While you can toggle between standard and high range modes you cannot toggle between the standard/high and ultralow modes since these are two different sensor boards. Two slope calibrations are stored in dual mode standard/high sensors; slope low is used for the standard mode and slope high for the high mode. Slope calibrations are automatically assigned based upon range mode in use for sensor at time when calibration is performed. The ultralow range mode only uses the single low slope (slope high is unused).
SENSOR
AST10 AST51 AST41 ASTXX-TRI AST42 AST40 AST50 AST60 AST52
CELL CONSTANT 0.01 0.02 0.05 0.10 0.20 1.00 2.00 3.00 5.00 10.00 20.00
Color Coding
Available in Cell Constant Not available in that Cell Constant
All sensors are available in smart digital HiQDT MODBUS RTU configuration although not all cell constants are available for each model. Use the standard & high range mode cell constant table above & ultralow range mode table below to determine most suitable selection for your sample. Cell constants above K=2.00/cm omitted from ultralow range table but available on request.
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
ULTRA-LOW RANGE MODE – in microSiemens/cm
Range Scaling Factor
2
Max Temp. Compensated Conductivity using 2% per °C Coefficient
Cell Constant (K)
Max Raw Input Limit
Resolution
Lowest Recommended Measurement @ 25°C
@ 25°C
@ 75°C
@ 125°C
0.01
2
0.00004
0.02
2
1
0.667
0.02
4
0.00008
0.04
4
2
1.333
0.05
10
0.0002
0.1
10
5
3.333
0.10
20
0.0004
0.2
20
10
6.667
0.20
40
0.0008
0.4
40
20
13.333
0.50
100
0.002
1.0
100
50
33.333
1.00
200
0.004
2.0
200
100
66.667
2.00
400
0.008
4.0
400
200
133.33
Total dissolved solids (TDS) units are computed from measured conductivity.
The curves that define relationship between the measured conductivity and user
selectable total dissolved solid (TDS) units of NaCl, KCl or 442 are
preprogrammed into sensor with full range of 0 to 100,000 ppm. The actual
usable range may be limited by the choice of cell constant and range mode in
which the sensor is operated.
Other types of total dissolved solids (TDS) for other electrolytes or
electrolyte mixtures can be programmed into the sensor on a special-order
basis (minimum order requirements apply for such special programming
requests). Inquire to the factory if you have need for such special TDS units
for your smart digital HiQDT MODBUS RTU conductivity sensors.
Salinity computed from the measured conductivity. Curves that define the
relationship between measured conductivity and the computed salinity in PSU
are preprogrammed into the sensor with a full range of 0.000 to 50.000 PSU.
The actual supported range may be limited by cell constant & range mode used).
Contact the factory to determine the most suitable sensor model and cell
constant configuration for your desired salinity range of interest.
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
Ultralow Range Conductivity Sensors for Ultrapure Water (UPW)
The conductivity of pure water varies significantly with temperature in a well-defined but non-linear fashion as detailed in the graph to left. This behavior is preprogrammed into the HiQDT-CON-L MODBUS RTU conductivity sensors for the automatic temperature compensation feature to make it suitable for ultrapure water (UPW) type applications.
Although the recommended cell constant for performing conductivity measurement in UPW is K=0.01/cm for best resolution and lower bounds of measurement there may be situations where this K=0.01/cm cell constant cannot be used for the planned installation location because of limitations such as piping arrangement and low-flow. The higher cell constants of K=0.05/cm or K=0.10/cm can be used instead in such cases albeit they require the sample to be at a higher temperature to ensure best results. Table below details recommended minimum temperature for various cell constants for use in UPW. The minimum temperature for UPW measurement for each cell is determined based upon the lowest absolute conductivity value for which the cell constant is recommended & temperature at which this conductivity occurs for UPW. Resistivity are computed units are the inverse of the measured conductivity value.
ULTRA-LOW RANGE MODE – MicroSiemens/cm
Range Scaling Factor
2
Cell Constant (K)
Raw Max
Lowest Recommended Minimum Absolute MegaOhm (MW)
Input @ 25°C Resolution Absolute Measurement Temp °C @ Min Recommended °C
0.01
2
0.00004
0.02
8
50
0.05
10
0.0002
0.1
40
10
0.10
20
0.0004
0.2
55
5
- Minimum recommended temperature is conductivity of UPW which is 1% of ultralow range mode for the given cell and the associated MegaOhm units. Measurements can be performed below the recommended minimum temperature with an associated higher uncertainty for those situations.
For ultralow range conductivity sensors the 5th read input register (30005)
sends the computed resistivity
MegaOhm (MW) using the user defined linear automatic temperature compensation
(ATC) while the 6th read input register (30006) sends computed resistivity
MegaOhm (MW) using the special non-linear ultrapure water style automatic
temperature compensation. The resistivity values sent as 0 to 50,000 steps
corresponding
to 0.000-50.000 MegaOhm (MW) for both the 5th (30005) & 6th (30006) read input
registers. Theoretical temperature compensated resistivity value can never go
above 18.18 MegaOhm (MW) for uncontaminated pure water since this is the ideal
value at 25 degrees Celsius.
Temperature compensated conductivity and resistivity are referenced back to
the 25 °C condition for all ATC. Ultrapure water with no contaminants has a
value of
0.055 µS/cm conductivity or 18.18 MW in resistivity. The most common units for
measurement of pure water
is resistivity (MW) MegaOhm due to high resolution and convenient scaling in
the very low conductivity levels. Temperature compensated conductivity and
computed resistivity values sent for the ultralow range mode smart digital
HiQDT-CON-L style MODBUS RTU conductivity sensors as well as the raw
conductivity.
Graph above shows relationship between the resistivity of pure water
at various temperatures. Computed resistivity MegaOhm (MW) units are the
inverse of measured conductivity and so are the mirror image of the
conductivity at various temperatures for ultrapure water (UPW). Graph above
shows absolute raw resistivity at various temperatures. Resistivity values
sent include ATC referencing reading to 25 °C state.
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
HiQDT-CON-ISO-L-10X SENSOR CELL & RANGE TABLE FOR ULTRALOW-10X HARDWARE
ULTRA-LOW RANGE MODE 10X * – in microSiemens/cm
Range Scaling
Max Temp. Compensated Conductivity using 2% per °C
Factor
2
Coefficient
Max Nomina ACTUA Raw
Lowest Recommended
@ 25°C @ 75°C @ 125°C
l Cell L Cell Input Resolution Measurement @
Int ** Constant Limit
25°C
10
0.01
20
0.0004
0.2
20
10
6.667
20
0.02
40
0.0008
0.4
40
20
13.333
50
0.05
100
0.002
1.0
100
50
33.333
100
0.10
200
0.004
2.0
200
100
66.667
200
0.20
400
0.008
4.0
400
200
133.33
500
0.50 1,000
0.02
10.0
1,000
500
333.33
1000 1.00 2,000
0.04
20.0
2,000
1,000
666.667
2000 2.00 4,000
0.08
40.0
4,000
2,000
1,333.33
- Range mode defined by register 40018. When register 40018 is 2 then range scaling factor is ultralow mode. This register 40018 is read only for the ultralow mode sensor type.
** The nominal cell constant of conductivity sensor is found by dividing integer obtained from register 40019 by 100.
*** The resolution is always 50,000 steps no matter the nominal cell constant of sensor or range mode that is in operation.
If sensor used is only ever just one cell constant and range mode, then simple scaling of 0-50,000 steps to conductivity range is possible. Procedure below supports any cell constant in any range mode without changing programming of MODBUS RTU master PLC device:
- Converting registers 30001 & 30003 for conductivity sensors into µS/cm conductivity units
To display calibrated & temperature compensated conductivity in µS/cm units, use the following formula: uS/cm = ( ( REG30001 REG40019 ) REG40018 ) / 50,000 To display calibrated raw conductivity in µS/cm units use register 30003 instead of 30001 in formula above.
- Converting µS/cm conductivity units into native 0-50,000 step sensor resolution units
When performing the autocalibration calls on the conductivity sensor you will
need to convert from the engineered µS/cm conductivity units to the 0 to
50,000 native resolution units of the conductivity sensor using this formula:
Native 0-50,000 sensor resolution units = ( uS/cm 50,000 ) / ( REG40019
REG40018 )
Native 0-50,000 sensor resolution units are what is sent to register 40011
(ultralow slope).
SPECIAL NOTES ABOUT ULTRALOW-10X STYLE SPECIAL ORDER SENSORS: It is not possible to tell whether the sensor that you have is the Ultralow style or the Ultralow-10X style simply from looking at register 40018 since this would be 2 in both cases. The only way to tell that you have the Ultralow-10X style hardware is that the nominal cell constant detailed in register 40019 will be 10 times higher than the actual cell constant as indicated on the sensor label. This ten-fold deviation between the nominal and the actual cell constant is what is to be expected if you have purchased the Ultralow-10X style sensor. The range of the Ultralow-10X follows what would be expected if the actual cell constant was ten times higher for the same ultralow sensor configuration. Contact factory if you should have any questions or concerns prior to ordering.
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
AST50 & AST60 Smart MODBUS RTU Conductivity Sensors
Wetted Materials of Construction
· Insulator o CPVC (AST50) or TEFLON (AST60)
· O-Rings o EPDM (Std); Viton, AFLAS or KALREZ
· Electrodes o 316SS (Std); Titanium, Monel, Hast C-276
Sensor Body
o CPVC (AST50) or KYNAR (AST60)
Cell Constants
o K = 0.1, 0.2, 1.0 or 2.0 /cm
Measurement Ranges
· Standard Download Standard/Hi Range Spec Sheet o 0.02-2, 0.04-4, 0.2-20,
0.4-40 mS/cm
· High Download Standard/Hi Range Spec Sheet o 0.2-10, 0.4-20, 2-100, 4-200
mS/cm
· Ultralow Download Ultralow Range Spec Sheet o 0.2-20, 2.0-200, 4.0-400 µS/cm
o 0.050-5.000, 0.005-0.500, 0.0025-0.250 MW
- Sensor can toggle between standard & high range mode in field.
Temperature Limits
· -35 to +95 °C (-31 to +203 °F) for AST50 · -35 to +120 °C (-31 to +248 °F)
for AST60 · -35 to +85 °C (-31 to +185 °F) for fully submersible use
Pressure Limits
· Max 100 psig @ 95°C for AST50 · Max 100 psig @ 120°C for AST60
Installation Styles Supported
· Inline, Immersion or Submersible · Waterproofing sealing option recommended
for
submersible installations without immersion rod
Typical Applications
· Water quality & wastewater treatment monitoring · Mixed use portable &
continuous field measurements
Special Features
· Open geometry is a good choice for samples with high viscosity and/or
particulars that may tend to foul as well as low-flow type installations to
avoid entrapped air bubbles in field use with varying flow & pressure
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
AST42 Smart Digital MODBUS RTU Conductivity Sensors
Wetted Materials of Construction
· Insulator o PEEK
· O-Rings o EPDM (Std); Viton, AFLAS or KALREZ
· Electrodes o 316SS (Std); Titanium, Monel, Hast C-276
Sensor Body
o CPVC or KYNAR
Cell Constants
o From K = 0.01/cm up to K = 20.0/cm
Measurement Ranges
· Standard Download Specification Sheet o From 2 to 400,000 µS/cm
· High Download Specification Sheet o From 20 to 2,000,000 µS/cm
· Ultralow Download Specification Sheet o From 0.02 to 4,000.00 µS/cm o From
0.00025 to 50.000 MW
- Sensor can toggle between standard & high range mode in field.
Temperature Limits
· -35 to +205 °C (-31 to +401 °F) for inline installations · -35 to +85 °C
(-31 to +185 °F) for fully submersible use
Pressure Limits For Installations WITH Compression Fitting
· Max 100 psig @ 100°C with polypropyelene (PP) · Max 400 psig @ 100°C or 250
psig @ 205°C with 316SS
For Installations WITHOUT Compression Fitting
· Max 100 psig @ 95°C for CPVC Sensor Body · Max 100 psig @ 120°C for KYNAR
Sensor Body
Installation Styles Supported
· Inline, Immersion or Submersible · Waterproofing sealing option recommended
for
submersible installations without immersion rod
Typical Applications
· High temperature and/or high pressure installation where a low or high cell
constant is needed for range
· Installs where special materials of construction required
Special Features
· Variable insertion depth with compression fitting option
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
AST40 Smart Digital MODBUS RTU Conductivity Sensors for HOT-TAP Valve
Retractable Field Installations
Drawing valid for K= 0.05, 0.10, 0.20, 0.50, 1.0 & 2.0 /cm cells. Position of
vent hole & associated insertion depth differs for low cells of K= 0.01 & 0.02
/cm & high cells K= 5.0, 10.0 & 20.0 /cm. Inquire to factory for drawings of
these alternate cell constants.
Smaller valve retractable configuration employing ¾”MNPT full port ball valve
with ½”O.D. sensor available upon request.
Wetted Materials of Construction
· Insulator o PEEK or TEFLON
· O-Rings o EPDM (Std); Viton, AFLAS or KALREZ
· Electrodes & Ball Valve o 316SS (Inquire to factory for other options)
Sensor Body
o CPVC or KYNAR
Cell Constants
o From K = 0.01/cm up to K = 20.0/cm
Measurement Ranges
· Standard Download Specification Sheet o From 2 to 400,000 µS/cm
· High Download Specification Sheet o From 20 to 2,000,000 µS/cm
· Ultralow Download Specification Sheet o From 0.02 to 4,000.00 µS/cm o From
0.00025 to 50.000 MW
- Sensor can toggle between standard & high range mode in field.
Temperature Limits
· -35 to +205 °C (-31 to +401 °F) for inline installations
Pressure Limits
· Max 400 psig @ 100°C or 250 psig @ 205°C when the sensor is stationary with
compression fitting tightened
· Up to Max 150 psig while sensor is being either inserted or removed from
field service
· Min 50 psig under all process conditions and installs
Typical Applications
· High temperature and/or high pressure installation where a low or high cell
constant is needed for range
· Installs where sensor must be inserted and removed without shutting down
process and where slip-stream installation scheme is not possible to implement
Special Features
· Variable insertion depth for HOT-TAP valve retractable installations without
shutting down process stream
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
AST10 & AST51 Smart MODBUS RTU Conductivity Sensors
Wetted Materials of Construction
· Insulator o TEFLON (PTFE)
· O-Rings o EPDM (Std); Viton, AFLAS or KALREZ
· Electrodes o 316SS (Std); Titanium, Monel, Hast C-276
Sensor Body
o CPVC or KYNAR
Cell Constants
o From K = 0.01/cm up to K = 10.0/cm
Measurement Ranges
· Standard Download Specification Sheet o From 2 to 200,000 µS/cm
· High Download Specification Sheet o From 20 to 1,000,000 µS/cm
· Ultralow Download Specification Sheet o From 0.02 to 2,000.00 µS/cm o From
0.0005 to 50.000 MW
- Sensor can toggle between standard & high range mode in field.
Temperature Limits
· -35 to +100 °C (-31 to +212 °F) inline Polypropylene (PP) · -35 to +120 °C
(-31 to +248 °F) inline KYNAR or 316SS · -35 to +85 °C (-31 to +185 °F) for
fully submersible use
Pressure Limits For Installations WITH Compression Fitting
· Max 100 psig @ 100°C with Polypropyelene (PP) · Max 150 psig @ 120°C with
KYNAR (PVDF) · Max 500 psig @ 100°C or 200 psig @ 120°C with 316SS
For Installations WITHOUT Compression Fitting
· Max 100 psig @ 95°C for CPVC Sensor Body · Max 100 psig @ 120°C for KYNAR
Sensor Body
Installation Styles Supported
· Inline, Immersion or Submersible
Typical Applications
· ½” Inline installations where compact footprint needed
Special Features
· Variable insertion depth with compression fitting option
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
Sanitary Smart Digital MODBUS RTU Conductivity Sensors
Wetted Materials of Construction
· Insulator o CPVC (AST50) or TEFLON (AST60)
· O-Rings o EPDM (Std); Viton or Kalrez
· Electrodes o 316SS (Std); Titanium, Monel, Hast C-276
Sensor Body
o CPVC (AST50) or KYNAR (AST60)
Cell Constants
o From K = 0.01/cm up to K = 10.0/cm
Measurement Ranges
· Standard Download Specification Sheet o From 2 to 200,000 µS/cm
· High Download Specification Sheet o From 20 to 1,000,000 µS/cm
· Ultralow Download Specification Sheet o From 0.02 to 2,000.00 µS/cm o From
0.0005 to 50.000 MW
- Sensor can toggle between standard & high range mode in field.
Temperature Limits
· -35 to +130 °C (-31 to +266 °F) TEFLON (PTFE) Insulator · -35 to +205 °C
(-31 to +401 °F) PEEK Insulator
Pressure Limits
· Max 150 psig @ 130°C or 500 psig @ 25°C o Rating for TEFLON (PTFE) Insulator
· Max 250 psig @ 205°C or 500 psig @ 100°C o Rating for PEEK Insulator
Installation Styles Supported
· Sanitary TRI-CLOVER or Ladish Flange o Sizes from from ¾” up to 2½”
available
Typical Applications
· Food, Dairy, Beverage and Pharmaceutical Industries · Monitoring and control
of both steam in place (SIP) and
chemical clean in place (CIP) processes for sterilization
Special Features
· Quick disconnect for high pressure inline installations where fouling may
occur means ease of removal from process for cleaning without coiling sensor
cable
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
AST41 Smart Digital MODBUS RTU Conductivity Sensors
Wetted Materials of Construction
· Insulator o PEEK
· O-Rings o EPDM (Std); Viton, AFLAS or KALREZ
· Electrodes o 316SS
Sensor Body
o CPVC or KYNAR
Cell Constants
o K = 0.05, 0.1, 0.2, 1.0 or 2.0 /cm
Measurement Ranges
· Standard Download Standard/Hi Range Spec Sheet o 10-1,000 (K=0.05),
20-2,000 (K=0.1), 40-4,000 (K=0.2), 200-20,000 (K=1.0), 400-40,000 (K=2.0) §
Units indicated above are µS/cm
· High Download Standard/Hi Range Spec Sheet o 100-5,000 (K=0.05),
200-10,000 (K=0.1), 400-20,000 (K=0.2), 2,000-100,000 (K=1.0), 4,000-200,000
(K=2.0) § Units indicated above are µS/cm
· Ultralow Download Ultralow Range Spec Sheet o 0.1-10 (K=0.05), 0.2-20
(K=0.1), 0.4-40 (K=0.2), 2.0-200 (K=1.0), 4.0-400 (K=2.0), § Units indicated
above are µS/cm o 0.1-10 (K=0.05), 0.05-5 (K=0.1), 0.025-2.5 (K=0.2),
0.005-0.500 (K=2.0), 0.0025-0.25 (K=2.0), § Units indicated above are MW
- Sensor can toggle between standard & high range mode in field.
Temperature Limits
· -35 to +205 °C (-31 to +401 °F) · -35 to +85 °C (-31 to +185 °F) for fully
submersible use
Pressure Limits
· Max 500 psig @ 100°C or 250 psig @ 205°C o Rating for inline use with front
316SS Threads
Installation Styles Supported
· Inline Only · Waterproofing sealing option recommended for
submersible installations without immersion rod
Typical Applications
· Blowdown control, condensate monitoring & leak detection on heat exchangers
& high purity steam
· Boiler condensate and blowdown control and/or monitoring in installation
locations without coolers
· High pressure & temperature conductivity measurements applications such as
high-pressure desalination and reverse osmosis (RO) reject concentrate
monitoring and control
· High temperature and pressure water and steam in any severe service type
environment
Special Features
· Available in either standard 1.0 inch or extended 2.25 inch insertion depths
as most ideal for installation
· Ultra-rugged construction allows for long service lifetime in the most
aggressive field use scenarios
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM Trademark of ASTI
IOTRONTM
pH / ORP / ISE / DO / Conductivity Measurement Products Lines
AST52 Smart Digital MODBUS RTU Conductivity Sensors
Wetted Materials of Construction
· Insulator o CPVC (Std); TEFLON or PEEK Special Order
· O-Rings o EPDM (Std); Viton, AFLAS or KALREZ
· Electrodes o 316SS (Std); Titanium, Monel, Hast C-276
Front Sensor Body (Wetted)
o CPVC or 316SS
Rear Sensor Body (Non-Wetted)
o CPVC or KYNAR (PVDF)
Cell Constant
o K = 10.0/cm
Temperature Limits
· -35 to +95 °C (-31 to +203 °F) with CPVC insulator · -35 to +120 °C (-31 to
+248 °F) with TEFLON insulator · -35 to +150 °C (-31 to +302 °F) with PEEK
insulator · -35 to +85 °C (-31 to +185 °F) for fully submersible use
Pressure Limits For Installations with CPVC Sensor Body
· Max 80 psig @ 95°C with CPVC Insulator
For Installations with 316SS Sensor Body
· Max 100 psig @ 95°C or Max 500 psig @ 50°C o Rating for CPVC Insulator
· Max 100 psig @ 120°C or Max 500 psig @ 80°C o Rating for TEFLON (PTFE)
Insulator
· Max 100 psig @ 150°C or Max 500 psig @ 100°C o Rating for {EEL Insulator
Measurement Ranges
· Standard Download Specification Sheet o 2,000-200,000 µS/cm (2-200 mS/cm)
· High Download Specification Sheet o 20,000-1,000,000 µS/cm (20-1,000
mS/cm)
- Sensor can toggle between standard & high range mode in field.
Installation Styles Supported
· Inline, Immersion or Submersible · Waterproofing sealing option recommended
for
submersible installations without immersion rod
Typical Applications
· Saturated brines, brackish water and seawater · High concentration
electrolytes, acids and bases
Special Features
· Very compact insertion depth for inline installations with very high
conductivity
· Cost effective solution when exotic materials of construction are required
for measuring electrodes
Last Revised August 2, 2021
Advanced Sensor Technologies, Inc. U.S.A. Website: www.astisensor.com IOTRONTM Trademark of ASTI