Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Sensor Type	ENS160 (Multi-gas) + AHT20 (Temp/Humidity)
Detected Gases	CO2 (eCO2), TVOC, Temperature, Humidity
Communication Interface	I2C and UART
Operating Voltage	3.3V to 5V DC
TVOC Range	0 to 65535 ppb
eCO2 Range	400 to 65535 ppm
Temperature Accuracy	±0.3°C
Humidity Accuracy	±2% RH
Board Dimensions	24mm x 18mm x 3mm
Application	Indoor Air Quality Monitoring, HVAC Systems

6 reviews

Anonymous

Mar 27, 2026

Rating: 5/5

Excellent for plant monitoring

Using this to monitor air quality in my indoor greenhouse. It helps me know when to increase ventilation. The temperature and humidity readings match my standalone hygrometer perfectly.

Anonymous

Mar 24, 2026

Rating: 5/5

Easy to integrate

Documentation was clear enough to get started quickly. The combination of gas sensing and environmental monitoring on one small board saves a lot of space.

Anonymous

Mar 24, 2026

Rating: 5/5

Best compact air quality sensor

I have tried several modules, and this ENS160+AHT20 combo offers the best balance of features and size. The UART option is a nice backup if I2C pins are scarce.

Anonymous

Mar 15, 2026

Rating: 4/5

Good value, needs calibration time

Great sensor for the price. Just remember to let it run for a few days in a well-ventilated area before trusting the baseline values. The humidity sensor is quite accurate.

Anonymous

Mar 15, 2026

Rating: 5/5

Perfect for my smart home project

This module works flawlessly with my ESP32 setup. The I2C communication is stable, and the data readings for TVOC and eCO2 seem very responsive to changes in the room.

Anonymous

Mar 05, 2026

Rating: 4/5

Solid performance

The sensor is reliable. I deducted one star because the initial burn-in period took longer than expected, but once calibrated, it provides consistent data.

5 FAQ

Q: What is the warm-up time required before accurate readings?

A: For optimal accuracy, the sensor should be powered on for at least 72 hours in a clean air environment to establish a proper baseline, though preliminary data is available sooner.

Q: Is the library compatible with Arduino IDE?

A: Yes, there are several open-source libraries available for Arduino IDE that support both the ENS160 and AHT20 sensors on this combined module.

Q: Does this module require an external pull-up resistor for I2C?

A: The module typically includes onboard pull-up resistors, but we recommend checking your specific microcontroller requirements. In most standard setups, it works plug-and-play.

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

A: For standard I2C speeds, we recommend keeping cables under 30cm without bus extenders. For longer distances, consider using an I2C buffer or switching to the UART interface.

Q: Can this detect actual CO2 or only estimated CO2?

A: This module uses the ENS160 which provides eCO2 (equivalent CO2). It calculates CO2 levels based on VOC patterns and does not use an NDIR method for direct CO2 measurement.

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