Wireless IoT Level Monitoring/Alarming

The Telog WL-41 Water Level Recorder establishes a new standard in low power, low cost IoT communication sensors for monitoring and alarming remote water system levels. The Telog WL-41 is a versatile instrument intended to monitor water levels (e.g. underground aquifers, reservoir or water tower levels). It is available with a choice of water level ranges, from 1 foot to 500 feet. .

Connected to Telog Cloud or on premise software applications, the Telog WL-41 may be configured to report its data on a schedule (5 or 15 minutes, hourly, etc. ) and/or on alarm (e.g. in response to a high or low or level threshold exceedance condition). The recorder can be programmed to sample the water level sensor up to once per second and transmit the data statistics as per the schedule.

The Telog WL-41 uses a low power, long range LoRaWAN™ communication protocol which is an industry standard for the emerging Internet of Things (IoT). The modem, antenna, pressure signal conditioning, data recorder and battery are integrated into a small, environmentally rugged package making the Telog WL-41 easy to install and put into service.

Making data calls every 15 minutes, the recorder can operate an average of 5 years on one user replaceable ‘C’ cell Lithium battery. This significantly reduces the cost of ownership as the need to visit remote sites for frequent battery changes is removed.

The Telog WL-41 is compatible with all Telog software applications, including Telog Online, Telog Enterprise and Telogers for Windows application software. This ensures that utilities have a complete solution addressing all their remote monitoring needs across their operations, delivered in a manner that suits each individual utility’s operations and IT needs.



Model: Telog WL-41
Type: Single channel level recorder with external sensor

-- Sample rate: 1 per second to 1 per 8 hours; user programmable
-- Clock accuracy: 0.01%
-- Memory size: 128 kbytes; 28,000 data values
-- Storage method: Wrap around (first-in; first-out)     

-- Sensor Interface: I²C serial protocol
-- Technology: LoRaWAN bi-directional class A protocol
-- Output Power: 18.5 dbm maximum
-- Frequency: 915 MHz (North America LoRa band)
-- Antenna: Integrated Antenna | External antenna optional

-- Factory installed single 3.6V Lithium ‘C’ cell, Saft LSH 14 or equal, user replaceable
-- Life: 5 years nominal @ 15 minute transmits @ medium to excellent signal strength

-- Size: 4.70”L x 3.2”W x 2.2”H
-- Weight: 1.5 lbs. (includes sensor + 15’ cable)
-- Material: Polycarbonate

-- Temperature: -40 to 160ºF
-- Rating: NEMA 4x (IP67) 

-- Model: Telog PT-DS1
-- Type: Strain gauge pressure sensor
-- Interface: I²C serial protocol
-- Range: Selectable 1, 2.5, 5, 10, 15, 30, 50, 100, 200, 300, 500 PSI (gauge or absolute)
-- Accuracy:  0.1% of full scale. Includes effects of non-linearity, temperature and repeatability
-- Temperature Range: -40°F to 185°F (freezing water will damage sensor)
-- Temperature Effect: ±0.01%/°F (32 to 90°F)
-- Pressure Over Range: 2x full scale with negligible calibration change. Proof pressure 4x full scale

-- Pressure fitting: 1/4” NPT male with depth nose cone
-- Environmental: Submersible to NEMA 6P (IP-68)
-- Sensor length: 5”
-- Sensor diameter: 1.0”
-- Sensor body: 316 stainless steel
-- Cable: Vented Polyurethane 0.275” diameter
-- Cable weight: 0.027 lbs./ft

Support Software
-- Telog Online (Data Hosted Solution)
-- Telogers Enterprise
-- Telogers for Windows

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