Solinst Water Level Temperature Sensors
Features
- Vented or absolute pressure sensor options with 0.05% full scale accuracy
- SDI-12, RS-485 Modbus RTU, and 4-20mA protocols for interfacing with data loggers and PLC systems
- Built-in hydrophobic filters eliminate the need for desiccant replacement on vented sensors
- Free ground shipping
- Expedited repair and warranty service
- Lifetime technical support
- More
Overview
The Solinst Water Level Temperature Sensor is a compact, all-in-one submersible hydrostatic level transmitter that provides continuous, stable and accurate water level and temperature readings for a wide variety of applications. The water level pressure sensor and temperature sensor are enclosed in a slim, robust 22 mm x 192 mm (7/8" x 7.55") 316L stainless steel housing. Double O-ring seals prevent leaks, and a Faraday cage design protects against power surges and lightning.
Design
Each probe features a removable nose cone for optional use of the 1/4" NPTM threaded connection. The durable water level pressure sensor provides 0.05% FS accuracy with automatic temperature-compensated readings. There are six pressure ranges to choose from (5-200 m), with options for absolute (non-vented) and gauged (vented) pressure sensor setups.
Data Availability
The Water Level Temperature Sensor works with digital and analog protocols – MODBUS, SDI-12, and 4-20mA (add-on Current Loop Adaptor). They are easy to integrate into existing SCADA or PLC systems. Communication cable assemblies are available in lengths up to 300 meters. The cables are easily and securely attached to the sensor using a threaded connection. Simple PC software utilities are used to set up the sensor for the different protocols, perform simple diagnostics, and update sensor firmware if required. A USB-A programming cable is available for connection to the PC.
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In The News
Solinst Model 301 WLTS: Works Well Under Pressure
From an already successful line of water level and temperature loggers comes the new Water Level Temperature Sensor (WLTS) by Solinst, Inc. Unlike other water level measurement devices offered by Solinst, the WLTS is designed to integrate with 3rd party data loggers in industrial and environmental monitoring systems using digital communication protocols. Sensors that can be easily integrated with external devices allow for the addition of stable and continuous water level and temperature measurements to existing monitoring networks. While some water level sensors use pressure transducers to determine water level, the WLTS utilizes a hydrostatic level transmitter to record water levels and a platinum resistance temperature detector for temperature compensation.
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In warmer climates like Texas, high reservoir evaporation rates can lead to declines in water level and water availability during droughts, making monitoring essential in order to ensure water security during times of scarcity. According to the Texas Water Development Board (TWDB), evaporation rates in Texas were previously based on data collected from a sparse network of Class A evaporation stations, dating back to the 1960s. These pans were stationed near reservoirs and still remain a widely accepted standardized approach to measuring evaporation rates on land. Monthly pan-to-lake coefficients were developed in the 1980s to connect the data collected from the pans to known lake conditions, extrapolating evaporation rates of the lakes using the pan data.
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A Drop in the Ocean: Restoring London’s Tidal Thames
The United Kingdom has grappled with wastewater management problems for decades. Although sewage treatment in the 20th century allowed many rivers, including the tidal Thames, to have healthy fish populations, combined sewer overflows into rivers–most commonly during heavy rainfall–affected water quality and occasionally even killed fish. Problems reached a head in 2012 when multiple infractions of European urban wastewater treatment laws threatened costly fines, on top of the environmental cost of repeated sewage spills into British rivers. Fast forward to 2025, and after a decade of construction work, London’s Thames Tideway Tunnel , affectionately dubbed the “super sewer”, is now fully activated and ready for testing.
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