Low cost digital temperature sensor with alluminum probe, allowing low temperature resistance.

Several sensors may be connected using T-Box units.

  Technical Features

  • Alluminum probe Ø7mm
  • 2m long UTP cable with connector RJ11
  • Operating temperature range -40°C to +85°C
  • Temperature sensor resolution 0.1 °C
  • Temperature measuring accuracy ± 0.5 °C in range from -10°C to +85°C and otherwise ±2.0°C
  • Communication 1-Wire bus (Data, GND, +5V)

 Installation Instructions

The sensor has 4-wires which are connected to a compatible IPsensors controller.

1 GND(Green/White)
2 1 wire Data(Green)
3 GND(Brown/White)
4 +5V(Brown)

All IPsensors controllers can support “1-Wire” sensors. On every sensor on the bus is assigned a unique serial number which is used to address the sensor during communication. Multiple sensors can be connected in two ways: directly connected (star topology) or “daisy chained” (linear topology). Many factors can determine the maximum length of the cable, including the sensor network topology, the number of sensors and ambient electromagnetic noise. Combined cable lengths to all sensors of 50 m using Cat 5e cable have been successful. However, due to the uniqueness of installation environments, results may vary. We recommend to do test in the desired environment before making a permanent installation. Cable capacitance generally limits the length. A linear (daisy chain) topology will minimize signal reflections, providing a more reliable connection and will allow longer cable length than a star topology. The 1-Wire bus is "single-ended" and has no intrinsic noise protection. If the cable is routed near power lines is susceptible to interference from fluorescent fixtures, motors or other noise sources. Keep the cable wiring short and avoid routing it near other electrical equipment.

ST102 - user manual v1.0

User manual for Temperature Sensor ST102
(pdf, 714k)


IP Sensors

Mladost 4, Business Park Sofia

1766 Sofia,



Phone: +359882493678

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