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Small green PCB module with white sensor and black Grove connector, 24 by 20 by 12 mm

Seeed Studio

Seeed Studio Grove AHT20 I2C Industrial Temperature Humidity Sensor

SKU CH-H7P6-KR9BY

Industrial-grade sensor measures temperature from -40 to 85 °C and humidity 0 to 100 % RH with ±0.3 °C and ±2 % RH accuracy over I²C

  • TypeSensors
  • Industrial-grade reliability from -40 °C to 85 °C operating range
  • Precise humidity readings with ±2 % RH accuracy at 25 °C
  • Fast I²C integration via Grove interface at address 0x38
  • Compact 24 × 20 × 12 mm SMD package suits reflow soldering
  • Arduino-ready with tutorials and Wiki resources for quick prototyping

Industrial I2C Sensor

The Seeed Studio Grove AHT20 is a factory-calibrated temperature and humidity sensor built for industrial environments. It communicates over a Grove I2C interface at 0x38 and operates from 2.0 to 5.5 V DC. The board measures 24x20x12 mm and includes a Grove cable for quick connection to compatible hosts.

Suits harsh-environment logging.

Engineers monitoring climate in cabinets, greenhouses or process lines will benefit from the -40 to 85 °C range and 0 to 100 % RH span with ±2 % RH and ±0.3 °C accuracy. Buyers who need certified traceability, condensation-rated housings or sub-degree humidity resolution should look at specialised metrology probes instead.

±0.3 °C accuracy drives fit

The on-chip temperature sensor delivers ±0.3 °C accuracy at 25 °C with 0.01 °C resolution, while the MEMS capacitive element provides 0.024 % RH resolution. If your control loop demands tighter temperature tolerance than ±0.3 °C, this module will not meet the requirement.

Highlights

  • Industrial-grade reliability from -40 °C to 85 °C operating range
  • Precise humidity readings with ±2 % RH accuracy at 25 °C
  • Fast I²C integration via Grove interface at address 0x38
  • Compact 24 × 20 × 12 mm SMD package suits reflow soldering
  • Arduino-ready with tutorials and Wiki resources for quick prototyping

Specifications

TypeSensors

Questions about this item

How can I verify the sensor is reading correctly after wiring it?

Check that the I²C bus detects address 0x38 and that the first readings fall within -40 ~ 85 °C and 0 ~ 100 % RH with the stated ±0.3 °C and ±2 % RH accuracy.

What ships in the box and what must I source separately?

The package includes one Grove AHT20 sensor board and one Grove cable; you will need a compatible host board and any mounting hardware.

Which version should I pick for an industrial environment?

This single AHT20 variant covers the full -40 ~ 85 °C and 0 ~ 100 % RH range with ±0.3 °C temperature accuracy, making it the appropriate choice for industrial use.

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