> **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

# 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.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0527:1` (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/SEN0527:1.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

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)