> **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

# DHT22 temperature-humidity sensor + extras

**Type:** Product page · **SKU:** ADA385 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/dht22-temperature-humidity-sensor-extras.html ([markdown](https://core-electronics.com.au/dht22-temperature-humidity-sensor-extras.html.md))

The DHT22 is a basic, low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and...

## Pricing

- **Price:** $17.35 (inc GST) — $15.77 AUD, exc GST
- **Quantity discounts:** 10+ $15.30 (exc GST) · 50+ $14.98 (exc GST)

## Availability & dispatch

- Out of stock — the product page offers email notification when it returns.

## How to buy

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## Description

The DHT22 is a basic, low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed). Its fairly simple to use, but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so when using Adafruit's library, sensor readings can be up to 2 seconds old.
 
 Simply connect the first pin on the left to 3-5V power, the second pin to your data input pin and the right most pin to ground. Although it uses a single-wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin! Adafruit have written an Arduino library with example code
 
 [Compared to the DHT11](https://core-electronics.com.au/dht11-basic-temperature-humidity-sensor-extras.html), this sensor is more precise, more accurate and works in a bigger range of temperature/humidity, but its larger and more expensive
 
 Comes with a 4.7K - 10K resistor, which you will want to use as a pullup from the data pin to VCC.

## Technical Details

- Low cost
- 3 to 5V power and I/O
- 2.5mA max current use during conversion (while requesting data)
- Good for 0-100% humidity readings with 2-5% accuracy
- Good for -40 to 80°C temperature readings ±0.5°C accuracy
- No more than 0.5 Hz sampling rate (once every 2 seconds)
- Dimensions 27mm x 59mm x 13.5mm (1.05" x 2.32" x 0.53")
- 4 pins, 0.1" spacing
- Weight (just the DHT22): 2.4g

Downloads:

[DHT22 datasheet](https://core-electronics.com.au/attachments/localcontent/DHT22_9183921af83.pdf)

Arduino library and example code

Detailed usage tutorial

![](https://core-electronics.com.au/attachments/localcontent/rohs_icon_8216055e11.jpg)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/3/8/385-00.jpg)