# High Temp Waterproof DS18B20 Digital Temperature Sensor - 3m long

**Type:** Product page · **SKU:** ADA3846 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/high-temp-waterproof-ds18b20-digital-temperature-sensor-3m-long.html ([markdown](https://core-electronics.com.au/high-temp-waterproof-ds18b20-digital-temperature-sensor-3m-long.html.md))

This is a pre-wired and waterproofed version of the DS18B20 sensor made with a PTFE wire cable. Handy for when you need to measure something far away, or in wet...

## Pricing

- **Price:** $44.80 (inc GST) — $40.73 AUD, exc GST
- **Quantity discounts:** 10+ $39.51 (exc GST) · 50+ $38.69 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 48 more in 8–12 days.

## Description

This is a pre-wired and waterproofed version of the DS18B20 sensor made with a PTFE wire cable. Handy for when you need to measure something far away, or in wet conditions. This sensor is a little more expensive than [the other waterproof version Adafruit have with a PVC cable](https://core-electronics.com.au/waterproof-ds18b20-digital-temperature-sensor-extras.html) because this one can be used up to 125°C - the limit of the sensor itself. That said, it's still not recommended for salt-water or corrosive environments since the stainless steel will eventually rust!

Because the sensor signal is 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](https://core-electronics.com.au/tmp36-analog-temperature-sensor-tmp36.html).

[You'll need a 4.7k resistor which is required as a pullup from the DATA to VCC line when using the sensor](https://core-electronics.com.au/catalog/product/view/sku/ADA2783). [Here's a CircuitPython/Python guide for these sensors](https://learn.adafruit.com/using-ds18b20-temperature-sensor-with-circuitpython). Adafruit don't have a detailed Arduino tutorial, but you can get started by using the Dallas Temperature Control Arduino library which requires also the OneWire Library.

![https://www.youtube.com/embed/Zzhqn1K7OwQ?start=193](https://core-electronics.com.au/attachments/localcontent/hqdefault_19169d6d564.jpg)

## Technical Details

### Cable specs: 

- Stainless steel #316 tube 6mm diameter by ~30mm long (size of stainless steel capsule may vary!)
- Cable is approx 3m long / 300cm long
- Contains DS18B20 temperature sensor
- Three wires - Orange Stripe connects to 3-5V, White connects to ground and Blue Stripe 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
 
[DS18B20 Datasheet](https://core-electronics.com.au/attachments/localcontent/DS18B20_26189e7eea8.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/3/8/3846-06.jpg)