Level Measurement

Solar Powered Digital Water Level Recorder With Telemetry

The Accumax Solar Powered Digital Water Level Recorder (TDWLR, also called an Automatic Water Level Recorder) captures water levels digitally and transmits them wirelessly for real-time remote monitoring.

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Accumax Solar Powered Digital Water Level Recorder With Telemetry

How it works

A submerged piezoresistive sensor measures the hydrostatic pressure of the water column above it and converts that to level. The probe carries an integral temperature sensor and a vented cable, and connects to a data logger that stores readings locally and transmits them to a remote server.

Features

Easy installation

Swift setup, usually under 5 minutes.
Door open/lock notification

Notifies on enclosure door open/lock; the source calls this a feature rare elsewhere in the industry.
Solar-powered

Self-sustaining solar operation, stated to deliver efficiently in cloudy weather.
Longer backup battery life

Operates uninterrupted for 48 to 72 hours if disconnected from the solar panel.
Water level recorder

Digitally captures precise water levels.
Wireless technology

Customisable: NB-IoT, GPRS, GSM and edge-based options available.
Data logging

Automates data recording and reduces manual collection effort.
Real-time monitoring

Continuous monitoring for immediate action.
Remote access

Data accessible from anywhere for real-time decision-making.
High accuracy

Claimed by the source; no accuracy figure is given.
Weatherproof and corrosion-resistant design
Scalable system

Network can be grown to match evolving monitoring needs.
Zero maintenance

Stated to minimise upkeep and cut operational costs.

Technical specifications

18 values · 6 groups

These values are transcribed from the manufacturer's datasheet and are pending engineering sign-off. Confirm critical figures with Accumax before specifying.

Measurement
Measurement principle	Calculates the water level on hydrostatic pressure analysis
Measured parameters	Groundwater level, water temperature, atmospheric pressure, atmospheric temperature
Range	Based on sensor
Sensing element	Piezo sensor with temperature sensor, sensor cable, data logger with telemetry unit, and UI application
Logged data fields	Date, Time, Corrected Water Level (Mtr), Raw Water level, Water Temp (C), Atm Press (Bar), Atm Temp (C), Batt Volt
Electrical
Power (DC)	+12 volt DC / +24 volt DC
Power source	Rechargeable battery charged using a solar panel; power supply module 12V DC output to device +V and GND terminals
Interface
Display	16 x 2 matrix display
Programming	3 tactile button
Memory	SD Card
Module	Wi-Fi Module, SD Card Reader Module, Barometer Module
Communication & Data Storage
GSM	Data transmitted to the server at preset time intervals; user logs in with credentials to monitor and download data at http://live.accumaxinstruments.com
Wi-Fi	Fetches data stored in the SD card and transmits it to a web page; Wi-Fi name is TDWLR-<Hardware ID>; page reached at tdwlr.local or IP address 192.168.4.1
SD card storage	Data stored on SD card in .CSV file format at preset time intervals; file name in (HardwareID) format
RS485	Device A and B wires to PC via USB to RS-485 converter for the Desktop Application (RS485 module D+ and D- terminals)
Parameters settable over RS485	Pressure sensor, GSM log interval, SD card log interval, Depth of sensor, Error compensation, Water Temperature enable
Operating Conditions
Location	Indoor / outdoor
General
Package Contents	TDWLR device with metal enclosure, solar panel with chargeable battery, SIM card, antenna, piezo sensor with cable, SD card, user manual

Source: TELEMETRY_DIGITAL_WATER_LEVEL_RECORDER

4 further specification s are listed in the datasheet but not reproduced here

These labels appear in the datasheet, but the value beside them could not be read reliably from the document. Rather than print a figure we cannot stand behind, we have left them out — ask us and we will confirm them directly.

ACCURACY — the row label 'Percentage of full scale at reference condition' is printed with no value in the text layer; no accuracy figure is recorded
Operating Conditions / Temperature — value only partially survives: the text layer reads 'Temperature | degrees to 60 degrees if metal mounting', with the lower bound lost
RANGE example values — the examples read 'Ex: to 20 meters, to 4 meters'; the lower bound of each example range is lost from the text layer
Warranty period — the text reads 'A warranty period for our company's products is within [ ] months from the date of purchase'; the number of months is lost

Applications

Real-time water level monitoring
Remote/unmanned site monitoring where mains power is unavailable
Automatic water level recording and data logging
Scalable multi-site monitoring networks

Frequently asked questions

What happens at night or during long cloudy spells?

The unit is stated to deliver efficiently in cloudy weather, and its backup battery keeps it operating uninterrupted for 48 to 72 hours if it is disconnected from the solar panel.

Which wireless networks does it support?

The wireless link is customisable, with NB-IoT, GPRS, GSM and edge-based options available.

How quickly can it be installed on site?

Setup is described as swift and hassle-free, usually taking under 5 minutes.

Can it detect tampering with the enclosure?

Yes. It has a door open/lock notification feature, which the source describes as rare elsewhere in the industry.

Does it store data locally, or is everything sent live?

It both logs data automatically and supports real-time monitoring with remote access to the data from anywhere; the source does not state the local storage capacity.

Gallery

Need help specifying the right instrument?

Tell us the fluid, line size and accuracy you need. Our engineers will recommend a configuration and quote it.

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