# Fermion: AHT20 Temperature and Humidity Sensor (Breakout)

**Type:** Product page · **SKU:** SEN0527 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/fermion-aht20-temperature-and-humidity-sensor-breakout.html ([markdown](https://core-electronics.com.au/fermion-aht20-temperature-and-humidity-sensor-breakout.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:** $7.15 (inc GST) — $6.50 AUD, exc GST
- **Quantity discounts:** 6+ $6.17 (exc GST) · 12+ $5.92 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 4 today, and up to 200 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.

This sensor can be widely used for measuring the environmental temperature and humidity of home electronic equipment, the temperature and humidity of automobiles, and so on.

**![Fermion: AHT20 Temperature and Humidity Sensor](https://core-electronics.com.au/attachments/localcontent/1_71055d10b81.jpg)**

**Connection Diagram**

###  Features

6. Digital output, I2C interface
7. Excellent long-term stability
8. Quick response and strong anti-interference ability
###  Applications

10. HVAC
11. Dehumidifier
12. Testing and Inspection Equipment
13. Consumer Appliances
14. Automobiles
15. Automatic Control
16. Data Loggers
17. Weather Stations
###  Specification

**Module Parameters**

20. Operating Voltage: DC2V~5V
21. Output Signal: I2C
22. I2C Address: 0×38
23. Dimension: 30mm×20.5mm/1.18×0.81"**AHT20 Chip Parameters**
    
    **Relative Humidity**
24. Resolution: 0.024 %RH
25. Accuracy Error: ±2% RH
26. Repeatability: ±0.1 %RH
27. Hysteresis: ±1 %RH
28. Non-linear: ±0.1 %RH
29. Response Time: 8S
30. Operating Range: 0~100 %RH
31. Long-term Drift: <0.5 %RH/yr**Temperature**
32. Resolution: 0.01°C
33. Accuracy Error: ±0.3°C
34. Repeatability: ±0.1°C
35. Hysteresis: ±0.1°C
36. Response Time: minimum 5S, maximum 30S
37. Operating Range: -40°C ~ 85°C
38. Long-term Drift: <0.04°C/yr
  **Documents**40. [Product wiki](https://wiki.dfrobot.com/SKU_SEN0527_Fermion_AHT20_Temperature_and_Humidity_Sensor)
41. [2D Dimensions](https://core-electronics.com.au/attachments/localcontent/9a7d61032f6f624658a9a89d2ea8ca68_72141e46b0e.pdf)
42. [2D Dimensions\_CAD](https://core-electronics.com.au/attachments/localcontent/f9d514930a05e0800424dc8165e8d1a8_16709b7b370.rar)
43. [3D STP](https://core-electronics.com.au/attachments/localcontent/082b477089c11d8b1cb1a50ff1efaed0_228268caf6b.rar)
44. [Circuit Diagram SCH](https://core-electronics.com.au/attachments/localcontent/adda98fc407766181b58dc5a38c99436_72274eb3fe2.pdf)
###  Parts List

46. Fermion: AHT20 Temperature and Humidity Sensor × 1
47. 2.54-4P Black Single-row Pin Header × 1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/S/E/SEN0527-1.jpg)