Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Brand	ASAIR
Model Number	DHT30
Communication Interface	I²C (Inter-Integrated Circuit)
Operating Temperature Range	-40°C to +80°C
Humidity Measurement Range	0% to 100% RH
Accuracy (Humidity)	±2% RH (typical)
Accuracy (Temperature)	±0.2°C (typical)
Supply Voltage	2.4V to 5.5V DC
Package Type	DFN-8 Surface Mount Module
Application Grade	Industrial & Indoor Environmental Monitoring

6 reviews

Anonymous

Mar 27, 2026

Rating: 5/5

Consistent performance in server rooms

Deployed twenty of these modules in our server room monitoring system. Zero failures so far after three months. The low power consumption is also a nice bonus for our battery-backed units.

Anonymous

Mar 26, 2026

Rating: 4/5

Great sensor, needs pull-up resistors

The sensor works flawlessly once you add the appropriate external pull-up resistors to the SDA and SCL lines. Documentation could be slightly clearer on this, but standard I²C practices apply. Very accurate data.

Anonymous

Mar 24, 2026

Rating: 5/5

Reliable upgrade from DHT22

Switched my weather station project from DHT22 to DHT30. The difference in update speed and accuracy is noticeable immediately. The industrial grade build quality gives me confidence for long-term deployment.

Anonymous

Mar 16, 2026

Rating: 5/5

Perfect for indoor agriculture monitoring

We use these sensors across our vertical farm setup. They handle the high humidity environments without drifting. The compact size made it easy to fit them into our existing enclosures.

Anonymous

Mar 15, 2026

Rating: 4/5

Good value for industrial specs

Solid sensor for the price point. It handles condensation events well and recovers quickly. Only giving 4 stars because the breakout board I bought separately had weak soldering, but the sensor module itself is top-notch.

Anonymous

Mar 01, 2026

Rating: 5/5

Excellent precision for HVAC projects

I integrated the DHT30 into a custom HVAC control board. The I²C communication is stable, and the readings are consistent with our calibrated lab equipment. Much better response time than the older DHT22 models.

5 FAQ

Q: Is this sensor compatible with Arduino Uno?

A: Yes, the DHT30 is fully compatible with Arduino Uno. You will need to connect the VCC, GND, SDA, and SCL pins and use an I²C library such as the official ASAIR driver or a generic I²C humidity library.

Q: How often should the sensor be recalibrated?

A: The DHT30 is factory-calibrated and typically maintains accuracy for years under normal operating conditions. For critical industrial applications, we suggest an annual verification against a reference standard.

Q: What is the maximum cable length recommended for I²C connection?

A: For reliable I²C communication at standard speeds (100kHz), we recommend keeping cable lengths under 30cm. For longer distances, consider using an I²C buffer or extender chip to maintain signal integrity.

Q: Can this sensor operate at 3.3V logic levels?

A: Absolutely. The DHT30 supports a supply voltage range of 2.4V to 5.5V, making it directly compatible with both 3.3V and 5V microcontroller logic systems without needing a level shifter.

Q: Does this module come with a protective filter cap?

A: The standard DHT30 module does not include a removable filter cap by default, but the sensing element has a built-in protective layer against dust. Optional IP67 housing accessories can be purchased separately for harsh environments.

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