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Waterproof DS18B20 Digital temperature sensor + extras

SKU: ADA381

$16.95 AUD, inc GST
$15.41 AUD, exc GST
Waterproof DS18B20 Digital temperature sensor + extras
16.95 AUD

SKU: ADA381

$16.95 AUD, inc GST
$15.41 AUD, exc GST
3 reviews 0 5 5
In stock, with a short lead time. 107 units dispatch in 4 to 7 days (in addition to the shipping method you choose). Our timing and stock is accurate. Delivery to you by Tue, 3rd of Oct with Express Post within Australia.

View our maker favourites for this product which are likely to be a great alternative.


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This is a pre-wired and waterproofed version of the DS18B20 sensor. Handy for when you need to measure something far away, or in wet conditions. While the sensor is good up to 125°C the cable is jacketed in PVC so they suggest keeping it under 100°C. Because they are digital, you don't get any signal degradation even over long distances! These 1-wire digital temperature sensors are fairly precise (±0.5°C over much of the range) and can give up to 12 bits of precision from the onboard digital-to-analog converter. They work great with any microcontroller using a single digital pin, and you can even connect multiple ones to the same pin, each one has a unique 64-bit ID burned in at the factory to differentiate them. Usable with 3.0-5.0V systems.

The only downside is they use the Dallas 1-Wire protocol, which is somewhat complex, and requires a bunch of code to parse out the communication. If you want something really simple, and you have an analog input pin, the TMP36 is trivial to get going.

Adafruit toss in a 4.7k resistor, which is required as a pullup from the DATA to VCC line when using the sensor. Adafruit don't have a detailed tutorial up yet but you can get started by using the Dallas Temperature Control Arduino library which requires also the OneWire Library.

Technical Details

Not for use in salt water or other corrosive environments.

Cable specs:

  • Stainless steel tube 6mm diameter by 30mm long
  • Cable is 36" long / 91cm, 4mm diameter
  • Contains DS18B20 temperature sensor
  • If your sensor has four wires - Red connects to 3-5V, Black connects to ground and White is data. The copper wire is soldered to the wire shielding
  • If your sensor has three wires - Red connects to 3-5V, Blue/Black connects to ground and Yellow/White is data

DS18B20 Technical specs:

  • Usable temperature range: -55 to 125°C (-67°F to +257°F)
  • 9 to 12 bit selectable resolution
  • Uses 1-Wire interface- requires only one digital pin for communication
  • Unique 64 bit ID burned into chip
  • Multiple sensors can share one pin
  • ±0.5°C Accuracy from -10°C to +85°C
  • Temperature-limit alarm system
  • Query time is less than 750ms
  • Usable with 3.0V to 5.5V power/data

Downloads: DS18B20 Datasheet

Documentation and Resources:

Product Comments


Customer Reviews

  1. Review by Michael verified purchaser
    Rating
    100

    High quality enclosure for this brilliant sensor. Even a relative novice should be able to get reliable temperature readings from this sensor in a no time with a Raspberry Pi. I recommend using +5V for power (3.3v should also be fine, but don't bother with the parasitic mode - more trouble than it's worth), but make sure you use only the +3.3V for the data line. Using this setup I was able to get error-free temp readings with a 10 m CAT5e cable, though I will try additional sensors and a longer cable soon. (Posted on 3/05/2017)

  2. Review by Jaimys - Great product verified purchaser
    Rating
    100

    I've hooked one up to a Raspberry Pi 2 to log temp data for one of my PhD experiments, and it works a charm. Python scripting is relatively easy to find online and modify too.

    10/10 - would sense temp again! (Posted on 11/09/2015)

  3. Review by Nickname - Does the job verified purchaser
    Rating
    100

    Does the job as advertised, easy to wire up and works great with the pi. Bought a few of these now for various things and still yet to have a problem with these sensors. Pretty accurate and a good length for most application. I have extended one to 5M with some CAT5 with no issues. (Posted on 29/11/2014)

We deliver Australia-wide with these options:

  • $3 for Small Items (4-6 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.32 for Express Post (1-2 days, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region

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:

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

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