> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Temperature Sensor - High Temperature, Waterproof (DS18B20)

**Type:** Product page · **SKU:** SEN-18367 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/temperature-sensor-high-temperature-waterproof-ds18b20.html ([markdown](https://core-electronics.com.au/temperature-sensor-high-temperature-waterproof-ds18b20.html.md))

This sealed digital temperature probe lets you precisely measure temperatures in wet environments with a simple 1-Wire interface.

## Pricing

- **Price:** $23.40 (inc GST) — $21.27 AUD, exc GST
- **Quantity discounts:** 5+ $20.64 (exc GST) · 25+ $20.21 (exc GST) · 100+ $19.35 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 3 today, and up to 46 more in 5–11 days.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN-18367:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
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- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## 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. Power for reading, writing, and performing temperature conversions can be derived from the data line itself with no need for an external power source.

Because each DS18B20 contains a unique silicon serial number, multiple DS18B20s can exist on the same 1-Wire bus. This allows for placing temperature sensors in many different places. Applications where this feature is useful include HVAC environmental controls, sensing temperatures inside buildings, equipment or machinery, and process monitoring and control.

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

Check out our guides for [connecting the DS18B20 to a Raspberry Pi](https://core-electronics.com.au/guides/raspberry-pi/temperature-sensing-with-raspberry_pi/).

**Specifications**

- 3.0-5.5V input voltage
- -55°C to +125°C temperature range
- ±0.5°C accuracy from -10°C to +85°C
- Waterproof
- 1 Wire interface
- Probe is 7mm in diameter and roughly 26mm long. Overall length (including wire) is 6 feet.
- Thermometer resolution is programmable from 9 to 12 bits.
- Electrical performance: no flicker or breakdown within AC 1200V/1S ,within DC 500V the insulation resistance shall be greater than 100MO
 
- [Datasheet](https://core-electronics.com.au/attachments/localcontent/DS-18367-Temperature_Sensor_-_High_Temperature__Waterproof__DS18B20__97805b7a296.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_412.jpg)