> **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

# 18B20 Temerature Sensor (Arduino Compatible)

**Type:** Product page · **SKU:** DFR0024 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/18b20-temerature-sensor-arduino-compatible.html ([markdown](https://core-electronics.com.au/18b20-temerature-sensor-arduino-compatible.html.md))

DS18B20 is a digital temperature sensor which is from DALLAS U.S. It can be used to quantify the environmental temperature testing.

## Pricing

- **Price:** $9.45 (inc GST) — $8.59 AUD, exc GST
- **Quantity discounts:** 6+ $8.16 (exc GST) · 12+ $7.82 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 01 and Sep 07.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=DFR0024:1` (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.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/DFR0024:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **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

### Introduction

DS18B20 is a digital temperature sensor which is from DALLAS U.S. It can be used to quantify the environmental temperature testing.

The temperature range -55 ~ +125°C, the inherent temperature resolution of 0.5°C, support multi-point networking mesh. Three DS18B20 can deloyed on three lines, to achieve multi-point temperature measurement. It has a 9-12 bit serial output.

This sensor can be directly plug and play with our [IO expansion shield](https://core-electronics.com.au/io-expansion-shield-for-arduino-v7.html).

### Features

- Digital temperature conversion and output
- Advanced single-bus data communication
- Maximum 12-bit resolution, accuracy up to ±0.5 degrees Celsius
- Parasitic mode available
- Temperature detection range: -55°C ~ +125°C (-67°F ~ +257°F)
- Built-in EEPROM and temperature limit

### Specification

- Voltage: +5V
- Interface:Digital
- Pin definition: 1--Output 2-Power 3---GND
- Weight: 5g

### Documents

- [Wiki Doc](https://www.dfrobot.com/wiki/index.php/Gravity:_DS18B20_Temperature_Sensor_(Arduino_Compatible)_V2_SKU:_DFR0024)
- [Schematic](https://core-electronics.com.au/attachments/localcontent/18B20TemperatureSensorSCH_332884f31bf.pdf)
- [DS18B20 Datasheet](https://core-electronics.com.au/attachments/localcontent/DFR0024_18B20_Datasheet_299486ad40e.pdf)
- [One Wire library](https://core-electronics.com.au/attachments/localcontent/OneWire_15704a6ff8a.zip) for 18b20
- [Sample code](https://core-electronics.com.au/attachments/localcontent/DS18B20forArduino1_86114776cf.zip)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/_/d/_dsc0844.jpg)