DS18B20 – One-Wire Digital Temperature Sensor



This is the latest DS18B20 1-Wire digital temperature sensor from Maxim IC. Reports degrees C with 9 to 12-bit precision, -55C to 125C (+/-0.5C). Each sensor has a unique 64-Bit Serial number etched into it – allows for a huge number of sensors to be used on one data bus. This is a wonderful part that is the corner stone of many data-logging and temperature control projects.


  • Unique 1-Wire® interface requires only one port pin for communication
  • Each device has a unique 64-bit serial code stored in an onboard ROM
  • Multidrop capability simplifies distributed temperature sensing applications
  • Requires no external components
  • Can be powered from data line. Power supply range is 3.0V to 5.5V
  • Measures temperatures from –55°C to +125°C (–67°F to +257°F)
  • ±0.5°C accuracy from –10°C to +85°C
  • Thermometer resolution is user-selectable from 9 to 12 bits
  • Converts temperature to 12-bit digital word in 750ms (max.)
  • User-definable nonvolatile (NV) alarm settings
  • Alarm search command identifies and addresses devices whose temperature is outside of programmed limits (temperature alarm condition)
  • Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally sensitive system
  • For more information on the DS18B20 check out Maxim-IC


Additional information

Weight 0.003 kg

7 reviews for DS18B20 – One-Wire Digital Temperature Sensor

  1. Jacques

    This 1-wire thermometer is cheap and very easy to use with an arduino as all the 1-wire libraries are present. The precision is extremely good. The advantage of the 1-wire setting is that once the first one is placed, one can put several other ones on the same 3-wire cable (I use 2 wires for power and 1 wire for data).

  2. 4 out of 5

    Bart (verified owner)

    Nice sensor for building cheap temperature loggers, see http://vaasa.hacklab.fi/2015/01/12/esp8266-ds18b20-thingspeak-nodemcu/

  3. 5 out of 5

    Bessière (verified owner)

    Very easy to use with Dallas library to access memory and register alarm

  4. 5 out of 5

    serfieledrag (verified owner)

    I’ve used it for logging temperature on my balcony and it work well and precise.

  5. 5 out of 5

    thiagoas (verified owner)

    Very precise temperature sensor, works nice.

  6. 5 out of 5

    steve.bromwich (verified owner)

    Cheap and accurate temperature sensor.

  7. 5 out of 5

    marc06 (verified owner)

    Good precision , and more reliable then my DHT11.

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