TQS3 Module is a digital temperature sensor. It measures temperature within the range from -55°C to +125°C and sends the measured value directly in degrees Celsius. The TQS3

thermometer has a very low consumption and communicates via an RS485 bus line using the

Spinel protocol. These features enable connecting more sensors with a four-wire bus line

containing an RS485 link and supply cable to the distance of up to 1200 m.

The module measures temperature using an integrated unit with the accuracy of ± 0,5°C. The

TQS3 module contains an indicator which blinks to signalize the ongoing temperature



  • Temperature measuring within the range of -55°C to +125°C
  • Transmission of measured temperature directly in degrees Celsius
  • Communication via an RS485 link
  • Very low consumption – typically only 2 mA
  • Measurement indication
  • Small size
  • Unstabilized supply voltage
  • Standardized metal cover diameter (outdoor design)
  • Spinel or Modbus RTU communication protocols (can be switched by the user)
  • Temperature monitoring by Wix software

TQS3 communicates over a standard two-wire RS485 industrial bus bar. It is powered by a DC

voltage of 7-20 V. The input is protected against reverse polarity.

Wago 236 terminal block is used to connect the power supply and RS485. Figure 2 shows the

terminal block inside the TQS3 O box.

Power supply is connected to terminals + (orange) and – (blue), RS485 is connected to

terminals Tx+ and Tx- (both grey).