Precise 1-Wire pipe contact sensor for measuring the surface temperature of pipes.

The digital pipe contact sensor ALTF-2 determines the temperature of the medium flowing in the pipe (e.g. the water temperature) via the surface temperature of the pipe and transmits it via a 1-wire network.


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The ALTF-2 offers in a robust IP65 housing the simple and precise acquisition and the interference-free digital data transmission of temperature values of liquids in pipes (via the surface temperature of the pipes) via the 1-Wire bus system. No calibration is necessary. Simple wiring of several probes in series, ring (not closed), star or tree with only two, optionally 3 wires Thermal conductive paste is recommended.

Technical Data

  • 2 / 3-wire connection (Data, GND, VDD) to 1-wire bus
  • Measuring range: -55 ... +85 °C
  • Resolution: programmable 9 - 12 bits (0.5 °C ... 0.0625 °C)
  • Accuracy: +/- 0.5 °C (-10 °C ... +70 °C)
  • Sensor element: DS18B20+

Mechanical data

  • housing: plastic, material polyamide, 30% glass ball reinforced
  • Colour: pure white, (similar to RAL 9010)
  • electrical connection: 0,14-1,5mm via screw terminals on PCB
  • Protection class: IP20 (according to EN 60529).
  • Cable gland: M16, with strain relief
  • Protection class: IP65 (according to EN 60529).
  • Dimensions: 72 x 64 x 39,4 mm