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  • High Stability
  • Usage Areas: Meteorology and Agricultural Measurements
  • Easy Installation
  • Digital Output Signal
  • Compatible with Data Logging Units
  • High Accuracy in Soil Temperature Measurements
  • Low Energy Consumption
  • Measures soil temperature at 5 different depths (-5 cm, -10 cm, -20 cm, -50 cm, and -100 cm) and air temperature above the soil (+5 cm).
  • The sensor's measurement points are made of materials with high thermal conductivity; resistant to water, salt, and other corrosive elements. 

Technical Specifications

Measurement Range -40 - +60 °C
Accuracy ±0.3 °C
Resolution 0.1 °C
Operating Temperature -40°C - +60°C
Protection Class IP67
Operating Voltage 12V DC
Operating Current 50 mA @12V DC, 25°C
Output Signal SDI12 and RS485 Half Duplex
Maximum Supply Voltage 15 V DC
Weight 250 g

TECH-SEN ST101 Models and Features

Model Number 470412

Output Signal Digital
Communication Protocol SDI12 and RS485 Half Duplex
SDI12 Version 1.4
Default SDI12 and RS485 Address 8
RS485 Communication Speed 9600-57600
Default Communication Speed 9600

 

Multiple data points can be printed from the SDI12 and ModBUS outputs of the Tech-SEN ST101 soil temperature sensor. Optional additions can be customized according to requests.

Calibration functions obtained as a result of calibration can be entered into the data transmission unit of the Tech-SEN ST101 soil temperature sensor via SDI12 or ModBUS commands.

Data such as sensor serial number, model number, manufacturer information can be printed from the SDI12 or RS485 outputs.

Tech-SEN ST101 470412 Model Cable Diagram

Cable Color Description Data Logger Terminal Connection
Blue Supply Ground Ground Connection
Brown Supply (+12V DC) 12V DC Output
Green RS485 A Digital Input
Yellow RS485 B Digital Input
Gray SDI12 Output SDI12 Input