When you need to measure temperature, the DS18B20 is a firm favourite. Easy to code and with an abundance of examples on the internet, it's a go-to temperature sensor!

This particular sensor is a pre-wired, waterproof version with a DS18B20-compatible sensor in the tip - great for measuring the temperature of liquids, or simply something further away from your microcontroller. These are a digital sensor, so you don't have to worry about signal issues over longer distances.

Now available in ~1m and ~3m lengths.

As the coating/exterior is made of PVC, we suggest limiting the submerged liquid temperature to 100°C to stay on the safe side. Don't use it in salt water or other corrosive liquids. Not IP rated or guaranteed for long-term/high-pressure usage.

These sensors are quite precise (±0.5°C usually and can give up to 12 bits of precision from the onboard digital-to-analogue converter.

They use the Dallas 1-Wire protocol, so data is transferred over a single IO pin, and they're suitable with 3-5V systems. Want something simpler than 1-wire? Maybe try the TMP36 instead.

A 4.7K resistor is included to use as a pull-up for fitting between the VCC and data pin. We toss in a 4.7k resistor, which is required as a pull-up from the DATA to VCC line. For Arduino-compatible devices, you can get started using the Dallas Temperature Control Arduino library which also requires the OneWire Library.

Specifications

Stainless steel tube 6mm diameter by 30mm long
Cable length (select before adding to cart):
- ~1m (sometimes as short as 90cm depending on the batch)
- ~3m
Contains DS18B20-compatible temperature sensor
Red connects to 3-5V, White/Blue/Black (varies by batch) connects to ground and Yellow/White (varies by batch) is data.

DS18B20 Specifications

Sensor temperature range: -55 to 125°C (but please stick to under 100°C due to the PVC coating!)
9 to 12-bit selectable resolution
Uses 1-Wire interface- requires only one digital pin for communication
±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

Resources

Maxim DS18B20 Datasheet (a good reference for these compatible versions)
Regulate Temperature with a Raspberry Pi Pico (thanks to Paulo for the link and excellent project)

Out Of Stock