LAPP AUTOMAATIO EPIC Sensors Magnetic Temperature Sensor Type T-MAGN/W-MAGN User Guide
- June 9, 2024
- LAPP AUTOMAATIO
Table of Contents
- Product description and intended use
- Temperatures, measuring
- Temperatures, ambient
- Temperatures, Ex i versions
- Code key
- Dimensional drawing
- Technical Data
- Materials
- Pt100; connection wiring
- Pt100; measuring current
- TC; connection wiring
- TC; non-grounded or grounded types
- Installation Instructions
- Type label of standard versions
- Serial number information
- Ex i data (only for types with Ex i approval)
- Ex i – Special Conditions for Use
- Ex i certificates and Ex markings
- Ex i type label
- EU Declaration of Conformity
- Manufacturer contact information
- Document history
- Documents / Resources
LAPP AUTOMAATIO EPIC Sensors Magnetic Temperature Sensor Type T-MAGNW- MAGN
Product description and intended use
Sensor types T-MAGN (thermocouple, TC) and W-MAGN (resistance, RTD) are
magnetic temperature sensors with cable.
Sensors are intended for various industrial measuring applications. The
construction allows quick and easy installation for surface temperature
measurement on flat ferro-magnetic surfaces. Installation is carried out by a
permanent magnet attached to sensor tip.
Sensor element protection tube material can be chosen, and element / cable
length can be produced according to customer needs.
Measuring elements are rigid, non-bendable versions. Elements can be TC or RTD
elements, standard versions are K-type thermocouple (for T-MAGN) and 4-wire
Pt100 (for W-MAGN). Tailored versions are produced on request.
Wire and cable sheath materials can be chosen.
Also available as ATEX and IECEx approved protection type Ex i versions.
Please see section Ex i data.
EPIC® SENSORS temperature sensors are measuring devices intended for
professional use. They should be mounted by professionally capable installer
who understands the installations surroundings. The worker should understand
mechanical and electrical needs and safety instructions of the object
installation. Suitable safety gear for each installation task must be used.
Temperatures, measuring
Allowed measuring temperature range for sensor tip, both RTD and TC, is:
- With small magnet (Ø25 mm) -50…+200 °C, depending on cable material
- With large magnet (Ø60 mm) -50…+350 °C, depending on cable material
NOTE!
The maximum temperature for the large permanent magnet (Ø60 mm) part is +500 °C, and it de-magnetizes (loses its magnetism) permanently in +860 °C temperature (Curie point).
The minimum temperature -50 °C is approximately the lowest working point to have magnetic force. Lower temperatures must be examined separately.
These values apply only for the magnet component, for the sensor allowed measuring values are given above.
Temperatures, ambient
Allowed maximum ambient temperature for wires or cable, according to cable type, is:
- SIL = silicone, max. +180 °C
- FEP = fluoropolymer, max. +205 °C
- GGD = glass silk cable/metal braid jacket, max. +350 °C
- FDF = FEP wire insulation/braid shield/FEP jacket, max. +205 °C
- SDS = silicone wire insulation/braid shield/silicone jacket, only available as 2 wire cable, max. +180 °C
- TDT = fluoropolymer wire insulation/braid shield/ fluoropolymer jacket, max. +205 °C
- FDS = FEP wire insulation/braid shield/silicone jacket, max. +180 °C
- FS = FEP wire insulation/silicone jacket, max. +180 °C
Make sure the process temperature is not too much for the cable.
Temperatures, Ex i versions
For Ex i versions only (type designations -EXI-), specific temperature conditions apply according to the ATEX and IECEx certificates. For more details, please see section: Ex i data (only for types with Ex i approval).
Code key
Dimensional drawing
Technical Data
Materials| AISI 316l, max. temperature +250 ºC, temporarily +350 ºC,
other materials on request
---|---
Dimensions| Small magnet, external Ø 25 mm / height 7 mm, other dimensions on
request Large magnet, external Ø 60 mm / height 15 mm, other dimensions on
request
Cable materials| SIL = silicone, max. + 180ºC
FEP = fluoropolymer, max. +205 ºC
GGD = glass silk cable/metal braid jacket, max. +350 °C
FOF = FEP wire insulation/braid shield/FEP jacket, max. +205 °C
SDS = silicone wire insulation/braid sh1eld/silicone jacket. only available as
2 wire cable, max. +180 °C
TDT = fluoropolymer wire insulation/braid shield/fluoropolymer jacket, max.
+205 °C FOS = FEP wire insulation/raid shield/ silicone jacket, max. +180 ºC
FS = FEP wire insulations/silicone jacket, max. +180 ºC
Tolerances Pt 100
(IEC 60751}| A tolerance ±-0.15 + 0.002 x t. operating temperature
-100…+450 ºC
B tolerance ±0.3 + 0.005 x t, operating temperature – l96 …+600 ºC
B 1/3 DIN, tolerance± 1/3 x (0.3 + 0.005 xt}, operating temperature -196…+600
ºC
B 1/ 10 DIN, tolerance ±1/ 10x (0.3 + 0.005 x t), operating temperature
-196…+600 ºC
Tolerances thermocouple
(IEC 60584)| Type J tolerance class 1 = -40. – 375 ·c ±1.5·c, 376.
750 ºC ±0.004 x t
Type Kand N tolerance class 1 = -4 0… 375 ºC ±.5 ºC, 375 1000 °C±0.00 4 .x. t
Temperature range Ptl00| -50…+350 ºC for large magnet, depending on
cable material
-50 … +200°C for small magnet, depending on cable material
Temperature range thermocouple| -50 +350 ºC for large magnet,
depending-0n cable material
-50 _.+200 ºC for small magnet, depending on cable material
Approvals| ATEX, IECEx, METROLOGICAL PATTERN APPROVAL
Quality certificate| ISO 9001:2015 and ISO 14001:201-5 issued by ONV
Materials
These are the standard materials of components for the sensor types T-MAGN / W-MAGN.
- Cable/wires please see Technical data
- Heat shrink tube Irradiated Modified Polyolefin (max +125 °C), only on request, not used as standard
- Sensor element AISI 316L
- Magnet cover Zinc-plated Steel
- Magnet Ø25 mm: Hard-Ferrite (max. +200 °C) Ø60 mm: Aluminum-Nickel-Cobalt (max. +500 °C)
Other materials can be used on request.
Pt100; connection wiring
Image below: These are the connection colors of Pt100 resistor connections, according to standard EN 60751.
Pt100; measuring current
The highest allowed measuring current for Pt100 measuring resistors depends on
resistor type and brand.
Normally the recommended maximum values are;
- Pt100 1 mA
- Pt500 0,5 mA
- Pt1000 0,3 mA.
Do not use higher measuring current. It will lead to false measurement values
and might even destroy the resistor.
Above listed values are normal measuring current values. For Ex i certified
sensor types, type designation -EXI-, higher values (worst case) are used for
the self-heating calculation for safety reasons. For further details and
calculation examples, please see ANNEX A.
TC; connection wiring
Image below: These are the connection colors of TC types J, K and N.
TC; non-grounded or grounded types
Normally the thermocouple sensors are non-grounded, which means the protective
tube / MI cable sheath is not connected to the thermo material hot junction,
where two materials are welded together.
In special applications also grounded types are used.
NOTE! Non-grounded and grounded sensors cannot be connected to same
circuits, make sure you are using the right type.
NOTE! Grounded TCs are not allowed for Ex i certified sensor types
Image below: Non-grounded and grounded structures in comparison.
TC; thermocouple cable standards (color table)
Installation Instructions
Before any installation, make sure the target process/machinery and site are
safe to work!
Make sure the cable type matches the temperature and chemical requirements of
the site.
Installation phases:
- Install the sensor magnet on a plane ferro-magnetic surface.
- Make sure there is no excess bending force loading the cable.
- Mount extra strain relief, e.g. cable tie, for cable, if necessary.
Type label of standard versions
Each sensor has a type label attached to. It is a moisture and wear proof industrial grade sticker, with black text on white label. This label has printed information as presented below.
- Image below: Example of a standard sensor type label.
Serial number information
Serial number S/N is always printed on type label in the following form: yymmdd-xxxxxxx-x:
- yymmdd production date, e.g. “210131” = 31.1.2021
- -xxxxxxx production order, e.g. “1234567”
- -x sequential ID number within this production order, e.g. “1”
Ex i data (only for types with Ex i approval)
This sensor type is available also with ATEX and IECEx Ex i approvals. Assembly consists of a temperature sensor for magnet installation, with cable for connection (sensor type designation -EXI-). All relevant Ex data is given below.
Ex i – Special Conditions for Use
There are special specifications and conditions for use defined in
certificates. These include e.g. Ex data, allowed ambient temperatures, and
self-heating calculation with examples. These are presented in
Annex A: Specification and special conditions for use – Ex i approved
EPIC®SENSORS temperature
sensors.
Ex i certificates and Ex markings
Certificate – Number| Issued by| Applicable area|
Marking
---|---|---|---
ATEX –
EESF 21 ATEX 043X| Eurofins Electric & Electronics Finland Oy, Finland,
Notified Body Nr 0537| Europe| Ex II 1G Ex ia IIC T6…T3 Ga
Ex II 1/2G Ex ib IIC T6…T3 Ga/Gb Ex II 1D Ex ia IIIC T135 °C Da
Ex II 1/2D Ex ib IIIC T135 °C Da/Db
IECEx – IECEx EESF 21.0027X| Eurofins Electric & Electronics Finland Oy,
Finland,
Notified Body Nr 0537| Global| Ex ia IIC T6…T3 Ga
Ex ib IIC T6…T3 Ga/Gb Ex ia IIIC T135 °C Da
Ex ib IIIC T135 °C Da/Db
Note! Name change of the Notified Body Nr 0537:
- Until 31.3.2022, the name was: Eurofins Expert Services Oy
- As of 1.4.2022, the name is: Eurofins Electric & Electronics Finland Oy.
Ex i type label
For ATEX and IECEx Ex i approved versions there is more information on the label, according to applicable standards.
- Image below: Example of an ATEX and IECEx Ex i approved sensor type label.
EU Declaration of Conformity
The EU Declaration of Conformity, declaring products‘ conformance to the European Directives, is delivered with products or sent on request
Manufacturer contact information
Manufacturer HQ main office:
Lapp Automaatio Oy
Street address Martinkyläntie 52
Postal address FI-01720 Vantaa, Finland
Production site and logistics:
Lapp Automaatio Oy
Street address Varastokatu 10
Postal address FI-05800 Hyvinkää, Finland
Phone (sales) +358 20 764 6410
Email epicsensors.fi.lav@lapp.com
Https www.epicsensors.com
Document history
Version / date | Author(s) | Description |
---|---|---|
20220822 | LAPP/JuPi | Telephone number update |
20220815 | LAPP/JuPi | Material name text corrections |
20220408 | LAPP/JuPi | Minor text corrections |
20220401 | LAPP/JuPi | Original version |
Although every reasonable effort is made to ensure the accuracy of the content
of the operating instructions, Lapp Automaatio Oy is not responsible for the
way the publications are used or for possible misinterpretations by end users.
The user must ensure that she or he has the latest edition of this
publication.
We reserve the right to make changes without prior notice. © Lapp Automaatio
Oy
ANNEX A – Specification and special conditions for use – Ex i approved EPIC® SENSORS temperature sensors
Ex data for RTD (resistance temperature sensor) and TC (Thermocouple temperature sensor)
Sensor Ex data, maximum interface values, without transmitter or / and display.
Table 1. Sensor Ex data.
Electrical values | For Group IIC | For Group IIIC |
---|---|---|
Voltage Ui | 30 V | 30 V |
Current Ii | 100 mA | 100 mA |
Power Pi | 750 mW | 550 mW @ Ta +100 °C |
650 mW @ Ta +70 °C | ||
750 mW @ Ta +40 °C | ||
Capacitance Ci | Negligible, * | Negligible, * |
Inductance Li | Negligible, * | Negligible, * |
- For sensors with long cable part, the parameters Ci and Li must be included in the calculation. Following values per meter can be used according to EN 60079-14:
Ccable = 200 pF/m and Lcable = 1 μH/m.
Allowed ambient temperatures – Ex i temperature class, without transmitter and/or display.
Table 2. Ex i temperature classes and allowed ambient temperature ranges
Marking, Gas Group IIC | Temperature class | Ambient temperature |
---|
II 1G Ex ia IIC T6 Ga
II 1/2G Ex ib IIC T6-T3 Ga/Gb| T6| -40…+80 °C
II 1G Ex ia IIC T5 Ga
II 1/2G Ex ib IIC T6-T3 Ga/Gb| T5| -40…+95 °C
II 1G Ex ia IIC T4-T3 Ga
II 1/2G Ex ib IIC T6-T3 Ga/Gb| T4-T3| -40…+100 °C
Marking, Dust Group IIIC| Power Pi| Ambient temperature
II 1D Ex ia IIIC T135 °C Da
II 1/2D Ex ib IIIC T135 °C Da/Db| 750 mW| -40…+40 °C
II 1D Ex ia IIIC T135 °C Da
II 1/2D Ex ib IIIC T135 °C Da/Db| 650 mW| -40…+70 °C
II 1D Ex ia IIIC T135 °C Da
II 1/2D Ex ib IIIC T135 °C Da/Db| 550 mW| -40…+100 °C
Note!
The temperatures above are without gable glands.
The compatibility of cable glands must be according to the application
specifications.
If the transmitter and/or display will be inside the transmitter housing, the
specific Ex requirements of the transmitter and/or display installation must
be noted.
The used materials must comply the needs of application, e.g., abrasion, and
the temperatures above.
For EPL Ga Group IIC the aluminium parts in connection heads are subject to
sparking by impacts or friction.
For Group IIIC the maximum input power Pi shall be observed.
When the sensors are mounted across boundary between different Zones, refer to
standard IEC 60079-26 section 6, for ensuring the boundary wall between
different hazardous areas.
ANNEX A – Specification and special conditions for use – Ex i approved EPIC® SENSORS temperature sensors
Considering sensor self-heating
Self-heating of the sensor tip shall be considered in respect with Temperature
Classification and associated ambient temperature range and manufacturer’s
instructions for calculating tip surface temperature according to thermal
resistances stated in the instructions shall be observed.
Allowed ambient temperature range of sensor head or process connection for
Groups IIC and IIIC with different temperature classes are listed in Table 2.
For Group IIIC the maximum input power Pi shall be observed.
The process temperature shall not adversely affect ambient temperature range
assigned for Temperature Classification.
Calculation for self-heating of the sensor at the tip of sensor or the
thermowell tip
When the sensor-tip is located at environment where the temperature is within
T6…T3, it is needed to
consider the self-heating of the sensor. Self-heating is of particular
significance when measuring low
temperatures.
The self-heating at the sensor tip or thermowell tip depends on the sensor
type (RTD/TC), the diameter of sensor and structure of sensor. It is also
needed to consider the Ex i values for the transmitter. The table 3.
shows the Rth values for different type of sensors structure.
Table 3. Thermal resistance based on Test report 211126
Thermal resistance Rth [°C / W] | |
---|---|
Sensor type | Resistance thermometer (RTD) |
Measuring insert diameter | < 3 mm |
Without thermowell | 350 |
With thermowell made from tube material (e.g. B-6k, B-9K, B-6, B-9, A-15,
A-22, F-11, etc)| 185| 140| 55| 50| 13| 5
With thermowell – solid material (e.g. D-Dx, A-Ø-U)| 65| 50| 20| 20| 5| 1
Note!
If the measuring device for RTD-measuring is using measuring current > 1 mA,
the maximum surface
temperature of the temperature sensor tip should be calculated and taken to
account. Please see next page.
If sensor type has multiple sensing elements included, and those are used
simultaneously, note that the
maximum power for all sensing elements should not be more than the allowed
total power Pi.
Maximum power must be limited to 750 mW. This must be guaranteed by process
owner. (Not applicable for Multi-point temperature sensor types T-MP / W-MP or
T-MPT / W-MPT with segregated Exi circuits).
ANNEX A – Specification and special conditions for use – Ex i approved EPIC® SENSORS temperature sensors
Calculation for maximum temperature:
The self-heating of the sensor tip can be calculated from formula:
Tmax= Po × Rth + MT
( Tmax ) = Maximum temperature = surface temperature at the sensor tip
( Po ) = Maximum feeding power for the sensor (see the transmitter
certificate)
( Rth ) = Thermal resistance (K/W, Table 3.)
(MT) = Medium temperature.
Calculate the maximum possible temperature at the tip of sensor:
Example 1 – Calculation for RTD-sensor tip with thermowell
Sensor used at Zone 0
RTD sensor type: W-M-9K . . . (RTD-sensor with head-mounted transmitter).
Sensor with thermowell, diameter of Ø 9 mm.
Medium temperature (MT) is 120 °C
Measuring is made with PR electronics head mounted transmitter 5437D and
isolated barrier PR 9106 B.
Maximum temperature (Tmax) can be calculated by adding the temperature of the
medium that you are measuring and the self-heating. The self-heating of the
sensor tip can be calculated from the Maximum power (Po) which is feeding the
sensor and Rth-value of used sensor type. (See the Table 3.)
Supplied power by PR 5437 D is (Po) = 23,3 mW (from the transmitter Ex-
certificate)
Temperature class T4 (135 °C) must not be exceeded.
Thermal resistance (Rth) for the sensor is = 55 K/W (from Table 3).
Self-heating is 0.0233 W * 55 K/W = 1,28 K
Maximum temperature (Tmax) is MT + self-heating: 120 °C + 1,28 °C = 121,28 °C
The result in this example shows that, the self-heating at the sensor tip is
negligible.
The safety margin for (T6 to T3) is 5 °C and that must be subtracted from 135
°C; means that up to 130 °C would be acceptable. In this example the
temperature of class T4 is not exceeded.
Example 2 – Calculation for RTD-sensor tip without the thermowell.
Sensor used at Zone 1
RTD sensor type: W-M-6/303 . . . (RTD-sensor with cable, without head-mounted
transmitter)
Sensor without thermowell, diameter of Ø 6 mm.
Medium temperature (MT) is 40 °C
Measuring is made with rail-mounted PR electronics PR 9113D isolated
transmitter/barrier.
Maximum temperature (Tmax) can be calculated by adding the temperature of the
medium that you are measuring and the self-heating. The self-heating of the
sensor tip can be calculated from the Maximum power (Po) which is feeding the
sensor and Rth-value of used sensor type. (See the Table 3.)
Supplied power by PR 9113D is (Po) = 40,0 mW (from the transmitter Ex-
certificate)
Temperature class T3 (200 °C) must not be exceeded.
Thermal resistance (Rth) for the sensor is = 100 K/W (from Table 3).
Self-heating is 0.040 W * 100 K/W = 4,00 K
Maximum temperature (Tmax) is MT + self-heating: 40 °C + 4,00 °C = 44,00 °C
The result in this example shows that, the self-heating at the sensor tip is
negligible.
The safety margin for (T6 to T3) is 5 °C and that must be subtracted from 200
°C; means that up to 195 °C would be acceptable. In this example the
temperature of class T3 is not exceeded.
ANNEX A – Specification and special conditions for use – Ex i approved EPIC® SENSORS temperature sensors
Additional information for Group II devices : (acc. to EN IEC 60079-0: 2019 section: 5.3.2.2 and 26.5.1)
- Temperature class for T3 = 200 °C
- Temperature class for T4 = 135 °C
- Safety margin for T3 to T6 = 5 K
- Safety margin for T1 to T2 = 10 K.
Note!
This ANNEX is an instructional document on specifications.
For original regulatory data on specific conditions for use, always refer to
ATEX and IECEx certificates:
EESF 21 ATEX 043X
IECEx EESF 21.0027X
Documents / Resources
| LAPP
AUTOMAATIO EPIC Sensors Magnetic Temperature Sensor Type
T-MAGN/W-MAGN
[pdf] User Guide
EPIC Sensors Magnetic Temperature Sensor Type T-MAGN W-MAGN, EPIC Sensors
Magnetic Temperature Sensor Type T-MAGN, W-MAGN, EPIC Sensors Magnetic
Temperature Sensor, Temperature Sensor, Type T-MAGN W-MAGN, T-MAGN, W-MAGN
---|---
References
- Etusivu | EPIC® SENSORS
- Lapp Automaatio | Lapp Automaatio
- Frontpage | EPIC® SENSORS
- Frontpage | EPIC® SENSORS
- Lapp Automaatio | Lapp Automaatio
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