# Gravity: AHT20 Temperature and Humidity Sensor

**Type:** Product page · **SKU:** SEN0528 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/gravity-aht20-temperature-and-humidity-sensor.html ([markdown](https://core-electronics.com.au/gravity-aht20-temperature-and-humidity-sensor.html.md))

The AHT20 is a high-precision but low-cost temperature and humidity sensor, which is equipped with an improved MEMS semiconductor capacitive humidity...

## Pricing

- **Price:** $8.30 (inc GST) — $7.55 AUD, exc GST
- **Quantity discounts:** 6+ $7.16 (exc GST) · 12+ $6.86 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 70 more in 8–12 days.

## Description

The AHT20 is a high-precision but low-cost temperature and humidity sensor, which is equipped with an improved MEMS semiconductor capacitive humidity sensor element. It features standard I2C interface and a wide voltage supply of 2V-5V. And with the simple peripheral circuit, it performs stably even in harsh environments in the measuring range of -40°C ~ +85°C.

**![Gravity: AHT20 Temperature and Humidity Sensor](https://core-electronics.com.au/attachments/localcontent/1_64981032594.jpg)**

**Connection Diagram**

### Features

- Digital output, I2C interface
- Excellent long-term stability
- Fast response, strong anti-interference, and adaptability
- Gravity interface, simple wiring, no soldering required
 
### Applications

- HVAC
- Dehumidifier
- Testing Equipment
- Consumer Appliances
- Automobiles
- Automatic Control
- Data Loggers
- Weather Control
 
### Specification

#### Module Parameters

- Operating Voltage: DC2V-5V
- Output Signal: I2C
- I2C Address: 0x38
- Dimension: 30mm×20.5mm/1.18×0.81"
 
#### AHT20 Chip Parameters

**Relative Humidity**

- Resolution: 0.024 %RH
- Accuracy Error: ±2 %RH
- Repeatability: ±0.1 %RH
- Hysteresis: ±1 %RH
- Non-linear: ±0.1 %RH
- Response Time: 8S
- Operating Range: 0~100 %RH
- Long-term Drift: <0.5 %RH/yr
 
**Temperature**

- Resolution: 0.01°C
- Accuracy Error: ±0.3°C
- Repeatability: ±0.1°C
- Hysteresis: ±0.1°C
- Response Time: minimum 5S, maximum 30S
- Operating Range: -40°C ~ 85°C
- Long-term Drift: <0.04°C/yr
 
### Documents

- [Product wiki](https://wiki.dfrobot.com/SKU_SEN0528_Gravity_AHT20_Temperature_and_Humidity_Sensor)
- [Dimensions](https://core-electronics.com.au/attachments/localcontent/920d4b3016e0742f05befa52b56ff4ba_43822f318db.pdf)
- [Circuit Diagram SCH](https://core-electronics.com.au/attachments/localcontent/4d085cb39554caf3efa84deb68462430_749969bcb13.pdf)
- [2D Dimensions](https://core-electronics.com.au/attachments/localcontent/575bd6153d413a8efa7f1b6e4d2edaa7_43822f318db.pdf)
- [2D CAD\_Dimensions](https://core-electronics.com.au/attachments/localcontent/97ce3e588e0310b964368cd8a1008029_15147819ffe.rar)
- [3D STP](https://core-electronics.com.au/attachments/localcontent/abad0e65d367d3563e0a4e9c31d30d74_338727b6af4.rar)
 
### Parts List

- Gravity: AHT20 Temperature and Humidity Sensor × 1
- Gravity-4P I2C/UART Sensor Cable × 1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/S/E/SEN0528-1.jpg)