Aqua-Scope Technologies PREWIE02 Water Pressure Sensor Installation Guide

Water Pressure
Sensor
SKU: PREWIE02
Version: 1.0.0

Users and Installation Manual: Water Pressure Sensor (PREWIE02)

Product Description

The Aqua-Scope pressure sensor records the temperature and pressure of the water. The device consists of two parts:

• Main housing for signal processing and radio communication with battery compartment.
• The external sensor head is connected to the water pipe. The stainless steel sensor head has a silicon sensor mounted in silicone oil for highly accurate and low-noise pressure measurements in a wide operating range. The measuring range for pressure is between 1 and 10 bar. The sensor values are converted into digital values directly in the measuring head to suppress interference from the connection to the main housing. In addition, the temperature of the liquid medium is measured directly at the stainless steel diaphragm and is therefore very precise.

The sensor can send an alarm message if freely definable threshold values are exceeded or not reached.
The sensor’s polling frequency can be set between 0.1 second and several minutes and defines the battery life. For a measuring interval of 1 second, a battery life of approx. 10 years is calculated. The device connects to WIFI. Your mobile app help setting up the  connection and gives access the data and presents current and historical values and events.

The device is powered either via an external power supply with USB-C power supply unit or via an optional internal ER26500 battery (Bobbin Cell C).
Both the sensor head (IP67) and the main housing (IP65) are waterproof and can be used outdoors or in particularly humid and/or dirty environments.

Installation

The sensor head is screwed into inspection openings of existing water pipes or other suitable locations via a ¼ inch thread. If no inspection opening is available it is possible to use the edge valve below a sink or beside a toilet. For this option the installation is described below.

To make it short and easy – the video on aqua-scope.com/install explains the installation of the Aqua-Scope Sensor Head step by

step:

1. In case there are two edge valves under the sink, please identify the cold-water supply. Just open hot water and check which valve warms up.
2. Close the faucet and close the edge valve by turning clockwise.
3. Remove the metal hose from the edge valve using the 19 mm wrench supplied. You may want to have a towel on hand to catch the water leaking from the end of the hose.
4. Mount the T-shaped connector on top of the edge valve and fasten it using the 19 mm wrench.
5. Connect the metal hose to the upper end of the connector and fasten it using the 19 mm wrench.
6. Screw the Aqua-Scope pressure sensor head into the side opening of the connector and fasten it by hand. There is no need to make it super-tide.
7. Re-Open the edge valve by turning the knob anti-clockwise.
8. Please check all three connections for some seconds that there are no leaks.
9. Attach the Aqua-Scope to a suitable location using double-side tape and plug the sensor head into the water-proof screwable terminal of the main device. Attach the wired flood sensor to the small round terminal if desired.
10. Power the device using the USB C Power Plug. Please use the power supply provided within the scope of delivery. This power supply has very low distortion factor required for precise measurements of pressure.

Reset to Factory Default State

The factory default state is indicated by the LEDs blinking green/red. Please push the button after the initial buzzer beep (but not earlier!) and keep it pushed for 5 seconds. After 5 seconds you hear a lowfrequency sound. Now release the button! This reset  sequence will delete all settings including network access credentials.

WIFI Network Setup

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https://play.google.com/store/apps/details?id=com.aquascope.droid| https://apps.apple.com/app/aquascope/id1502533988

Download the App “Aqua-Scope” from your App store and register yourself as new account with email and password. You may want to use the QR codes above for a convenient access to your mobile app store. Follow the instructions on the app.
If you don’t want to use the Aqua-Scope Mobile App or if you want to integrate the device into your own monitoring system you can also setup and operate the device using any standard web browser. Please refer to the Aqua-Scope Developers Manual for more information, available at www.aqua- scope.com.

Functions and Usage

Every 15 minutes (when mains powered) or every hour (when battery operated) the device reports the following sensor values:

• Pressure of the water,
• Temperature of the water right at the sensor head.

The sensor values can be accessed in the Aqua-Scope App or they are reported into the network when integrated into third party systems. The device offers a low watermark and a high watermark threshold that can be defined using the mobile app. If the valued are exceeded an under pressure or overpressure alarm is issued.
Beside the water-related alarms the device also reports certain device-related conditions as alarm:

• No external sensor head connected
• Head present but no contact to water
• Battery Low
• Mains Power lost
• Bad communication network quality

All these alarm conditions are monitored continuously. Alarms are indicated on the device with red LED and buzzer sound (both can be disabled in the app) and they are reported into the Aqua-Scope Cloud and shown in the Aqua-Scop App. If the alarm condition disappears the alarm is reversed but will remain in green color in the app for information. Swiping them in the apps home page finally deleted them.
Further alarm reactions such as email, push notification or even a voice call can be defined in the AquaScope App.

LED-Signals

• All colors blinking: device boots up
• Yellow blinking: Devices tries to connect to network
• Red fast blinking (mains powered) or steady: Alarm
• green/red blinking: factory default
• 3 times green blinking plus buzzer: Device connected to network successfully and is ready to work
• Blue glowing (mains powered) or all LEDs off (battery operated): Device is operating

Battery Operation

If the device is battery-operated all focus in on extending battery life. The battery life depends on several factors:

• Presence of a Pressure Reduction Valve: If a PRV is present the device will draw significantly less power and the battery life extends at least by a factor of 2.
• Interval of status reporting. In mains power mode the device will report its status every 20 seconds and receive commands from the app/Cloud. In battery mode the device wakes up every hour only.
• Hence, every command such as open/close of the valve or setting certain parameters will be executed with delay.
• All status data such as temperature of water, consumption etc. are only reported once per hour (in mains every 15 minutes)
• The stand-by animation of blue led glowing is turned off in battery mode.

You find an estimation of the battery lifetime in the app under ‘Devices’. With PRV the battery will last about 8…10 years, without PRV the lifetime is about 4 years.

Scope of Delivery

• Water Monitor main device (without battery)
• Pressure sensor head with 80 cm cable
• 3/8 Inch water pipe connector (T-shaped)
• One external flood sensor with cable
• USB-C power cable and power supply
• 19 mm wrench to unfasten and fasten the 3/8 Inch connections of the pipe connector
• Manual

Information related to Drinking Water Directive EU 98/83/EC

The t-shaped part of the device is exposed to drinking water and therefore subject to the European Drinking Water Directive. The certified used material is called CW509L, which is in the list of approved of materials of the German Environment Agency (UBA) in the version from May 14th, 2020 under section 2.1.3.1.

Technical Data

• Power Supply: External USB Power Plug 5 V/ 1A
• Battery: Bobbin Cell C ER26500, Lithium-Thionyl Chloride
• Processor: ESP32-WROOM_32E (Xtensa Dual Core 32 Bit, 240 MHz, 520 KB RAM)
• Wireless Connection:
  • WIFI ESP Built-in 2.4 GHz 802.11 b/g/n, bitrate in ‘n’ mode up to 150Mbps
  • Lora: SX1261, EU868 MHz, SF 7-12, TX16 dBm, RX: – 147 dBm @ 300 bps, Class A
• Pressure Sensor Head:
  • Range : 0 … 1000 kPa (10 bar)
  • Overload: 150 Percent of maximum pressure
  • Connection: G ¼ “ female
  • Communication: I2C
  • Precision:
  • Built-in High-Precision Temperature Sensor
• Dimensions (Main): 91 mm x 91 mm x 30 mm
• Weight (Main Device): 105 gr
• Weight (Sensor Head): 140 gr
• Protection: Main Device: IP 65, Sensor Head: IP 67
• User Interface: 4 colored LED, single touchless button
• Environmental Conditions:
  • Shipment and Storage: -65 °C … 125 °C
  • Operation: – 20 °C … 50 °C
  • Rel. Humidity: 0…90 %

Support and Contact

Should you encounter any problem, please give us the opportunity to address it before returning this product. Please check our website www.aqua- scope.com and particularly the support section for answers and help. You can also send a message to info@aqua- scope.com.

While the information in this manual has been compiled with great care, it may not be deemed an assurance of product characteristics. Aqua-Scope shall be liable only to the degree specified in the terms of sale and delivery. The reproduction and distribution of the documentation and software supplied with this product and the use of its contents is subject to written authorization from Aqua-Scope. We reserve the right to make any alterations that arise as the result of technical development.

• Phone: +372 (0) 6248002
• eMail: info@aqua-scope.com
• Web: www.aqua-scope.com

Declaration of Conformity

**** Aqua-Scope Technology OÜ, Sakala 7-2, 10141 Tallinn, Republic of Estonia, declares that this radio emitting device works on the following frequences:

Hereby, Aqua-Scope Technology OÜ declares that the radio equipment type PREWIE02 is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address: www .aqua-scope.com/ce

Disposal Guidelines

**** Do not dispose of electrical appliances as unsorted municipal waste, use separate collection facilities. Contact your local government for information regarding the collection systems available.
If electrical appliances are disposed of in landfills or dumps, hazardous substances can leak into the groundwater and get into the food chain, damaging health and well-being.

Copyright © 2023 Aqua-Scope Technologies,
Sakala tn 7-2, 10141 Tallinn, Estonia,
www.aqua-scope.com

References

• YouTube
• Oscilloscope | Keysight
• Install a water leakage protection system DIY: Aqua-Scope
• CE Declarations + Datasheets: Aqua-Scope

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