# Temperature Sensor - Waterproof (DS18B20)

**Type:** Product page · **SKU:** SEN-11050 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/temperature-sensor-waterproof-ds18b20.html ([markdown](https://core-electronics.com.au/temperature-sensor-waterproof-ds18b20.html.md))

This sealed digital temperature probe lets you precisely measure temperatures in wet environments with a simple 1-Wire interface. The DS18B20 provides 9 to 12-bit (configurable) temperature readings over a 1-Wire interface, so that only one wire (and ground) needs to be connected from a central microprocessor.

## Pricing

- **Price:** $21.20 (inc GST) — $19.27 AUD, exc GST
- **Quantity discounts:** 5+ $18.69 (exc GST) · 25+ $18.31 (exc GST) · 100+ $17.54 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 61 today, and up to 65 more in 5–11 days.

## Description

This sealed digital temperature probe lets you precisely measure temperatures in wet environments with a simple 1-Wire interface. The DS18B20 provides 9 to 12-bit (configurable) temperature readings over a 1-Wire interface, so that only one wire (and ground) needs to be connected from a central microprocessor.

**It's also worth mentioning that this is a genuine DS18B20 and will operate as it expected in the Maxim datasheet.**

**Be aware that lower-priced devices are often clones and may not operate as expected or be permanently damaged when using official software.**

**Dimensions:** Probe is 7mm in diameter and roughly 26mm long. Overall length (including wire) is 6 feet.

**Note:** The pinout for this sensor is as follows: RED=Vcc BLACK=GND WHITE=SIG

**Features:**

- 3.0-5.5V input voltage
- Waterproof
- -55°C to+125°C temperature range
- ±0.5°C accuracy from -10°C to +85°C
- 1 Wire interface
 
**Documents:**

- [Datasheet](https://core-electronics.com.au/attachments/localcontent/DS18B20_398944eeca0.pdf) (DS18B20)
- mbed Example

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/t/e/temperature_sensor_-_waterproof__ds18b20___sen-11050__01.jpg)