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Sensors > Temperature & Weather

Waterproof DS18B20 Digital temperature sensor

SKU: DFR0198

$10.08 AUD, inc GST
$9.16 AUD, exc GST

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Waterproof DS18B20 Digital temperature sensor
10.08 AUD

SKU: DFR0198

$10.08 AUD, inc GST
$9.16 AUD, exc GST
9 reviews 0 5 5
Shipping Offer


  • $6.95 Standard (2-4 days, tracked)
  • $9.95 Express (Overnight*, tracked)
  • $3 Economy Post* (3-7 days, no tracking)
  • FREE Pickup (Newcastle only)

Shipping costs may increase for heavy products or large orders.

Exact shipping can be calculated on the view cart page.

*Conditions apply, see shipping tab below.

Take temperature readings from a distance, or underwater, using this Waterproof DS18B20 Digital Temperature Sensor. It's got a 90cm (0.9m) cable with a stainless steel, PVC coated probe at the end. You'll be able to use it with any 3V-5V system, and take temperature readings with an accuracy of 9-12 Bits (configurable in code). The best part is that it's digital, meaning you won't suffer any signal degradation over the longer distance.

  • Waterproof - Take the temperatures of liquids/moist environments with the stainless steel probe. It's shrouded in PVC plastic too, meaning it will hold it's own in temperatures up to 100 degrees Celsius.
  • Temperature - Usable from -55 degrees Celsius to 125 degrees Celsius. Accuracy of ~0.5 degrees.
  • Digital - The digital interface used to relay the readings guarantees minimal signal degradation over the longer distances (~90cm for this standard cable)
  • 1-wire interface - You can have multiple DS18B20s connected to the same central micro-controller pin as each device has a unique identifier hard-coded in.
  • Long range - 1.5 meters of cable by default, but you can make it longer if needed!
  • Maker friendly - The DS18B20 chip is able to be powered with 3v - 5.5v which is perfect for maker platforms (Arduino, Raspberry Pi, etc)

Hook-up guide

This sensor is simple, you've got 3 wires (Power, Ground and Data). You simply need to connect the data pin to an input pin on your micro-controller (Arduino, etc) and the power and ground to power and ground!

You'll also need to connect a resistor between power and signal wires, as shown in the circuit diagram on the Sensor's wiki page.

You can simply use the One-wire library for any Arduino projects (See the examples below for more in-depth information). We've even made our own tutorial on using this sensor with a Raspberry Pi! As always, we're full time maker's with experience using this gear and we're here to help. Make a post in our forum to get more information on anything maker related.

Technical Specifications

  • Compatible with 3.0V to 5.5V systems (Arduino, Raspberry Pi, micro:bit, etc)
  • Within 0.5 degrees Celsius accuracy
  • Recommended usable temperature range: -55 to 125 degrees Celsius
  • Select-able 9-12 bit resolution (Factory Default at 12-bit)
  • 1 Wire Interface
  • Unique 64 bit ID for each sensor
  • Query time is less than 750ms
  • Stainless steel tube 6mm diameter by 35mm long
  • Cable diameter: 4mm
  • Cable Length: 90cm

This product is listed in:

Documentation and Resources:
  • Arduino Cooking Alarm with DS18b20 Sensor
  • Today we will be making an Arduino circuit that will start playing a noise if the water (or surrounding environment) reaches a certain temperature, in our case, that temperature will be 100° Celsius. This is a useful little project that takes barely any time at all but will be extremely useful to know when your pasta is ready, or when your kettle is ready to pour some coffee. In this project, we will be showing you how...
  • Rain Gauge Data Logger
  • Summary A Raspberry Pi 3B is used to collect digital counts from an electronic rain gauge (1mm of rain per reed switch closure by magnetic see-saw). It has been running without issues for over 12 months. A UPS powers the Pi so it is immune from short power glitches. The total count is displayed on an LCD screen with reset and inc/dec test buttons. “To HTML” and “To LCD” routines are also included to simp...
  • ThingSpeak temperature & pressure logger
  • This project logs temperature and pressure observations to a ThingSpeak channel using an ESP8266 WiFi module.
  • Basic Weather Station
  • The aim of this project was to provide a cost effective and basic weather station for my backyard that can upload readings to Weather Underground. Part 2 of the project will be using this local data to trigger activities in and around my house.

Product Comments

Customer Reviews

  1. Review by sreenish verified purchaser

    Did an experiment using DS18B20 with Raspberry Pi integrating with Salesforce :). Good product and definitely recommended (Posted on 18/02/2019)

  2. Review by Scott verified purchaser

    Ordered this sensor to monitor my Spa Temperature. Works perfectly and was shipped the same day! (Posted on 17/12/2018)

  3. Review by William verified purchaser

    This temperature sensor is ideal for temperature logging my homebrew fermentation fridge. It is easy to use and accurate. (Posted on 16/07/2018)

  4. Review by Luton verified purchaser

    Perfect for temperature measure in a dusty or wet environment. Plenty of pre written libraries out there to get you up and running quickly. (Posted on 5/06/2018)

  5. Review by travis verified purchaser

    As described and good quality (Posted on 18/04/2018)

  6. Review by Peter verified purchaser

    Easy to set up, especially with the tutorial on the website. (Posted on 8/03/2018)

  7. Review by Nathan verified purchaser

    Works as described, easy to hookup with one signal wire. (Posted on 8/02/2018)

  8. Review by Bradley verified purchaser

    Quality product, packaged well.

    Slow delivery (Posted on 19/12/2017)

  9. Review by Peter verified purchaser

    Rugged setup - works as expected - good value. (Posted on 18/08/2016)

Exact shipping can be calculated on the view cart page (no login required).

We deliver Australia-wide with these options:

  • $3 for Small Items (3-7 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $9.95 for Express Post (Overnight for most of Australia, 2+ days for rural, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

Unit 18, 132 Garden Grove Parade
NSW, 2289

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

Have a product question? We're here to help!