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HydroTemp Water Temperature Sensor


Product Highlights

  • Scientific-grade accuracy

  • Measures water, liquid, or soil temperature

  • Single temperature sensor and multi-depth version with up to 16 sensors

  • Low power consumption

  • RS-485 Modbus, SDI-12, and RS-232 interface available on all instruments


  • River and channel temperature monitoring

  • Oceanographic multi-depth temperature measurement

  • Water temperature supervision for aqua culture farming

  • Ecology water temperature monitoring

  • Multi-depth temperature sensor perfect for thermoclime observation


Product Description

The Geolux HydroTemp sensor comes as a single sensor or a multi-sensor array version for immersion into the water or soil to measure temperature in a single or multiple depths. Both variants have standard RS-485 Modbus and SDI-12 interfaces for easy integration with Geolux and third-party dataloggers. It is possible to connect up to 16 sensors in the multi-depth configuration with customizable distance between the sensors. The HydroTemp sensor has a high accuracy of 0.1 °C and a resolution of 0.01 °C for temperatures ranging from -20 °C to +70 °C, and a fast temperature change response due to the aluminum enclosure.

Detailed Specifications

General specifications

Sensor type                                                Digital MEMS (meets ASTM E 1112 and                                                                                ISO 80601-2-56) 

Measurement range                               -20 °C to +70 °C

Resolution                                                  0.01 °C

Accuracy                                                     0.1 °C in whole operating range

IP Rating                                                      IP68 

Enclosure Type                                        Anodized aluminum

Enclosure Dimension                           Φ16.5 mm x H 90 mm

Communication Interface                  1x RS-485 Modbus RTU, 1 x SDI-12

Electrical & Mechanical

Input  Voltage                                   9 to 27 VDC

Power Consumption                     0.15 W operational; 0.055 W standby

Maximal Current                              < 100 mA

Multi Depth Sensor                       Up to 16 sensors in single line

Maximum Water Depth               150 m

Enclosure Dimensions                Φ16.5 x H 90 mm

Mechanical Drawing




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