Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	ZE08-CH2O
Detection Target	Formaldehyde (CH2O)
Communication Interface	UART (TTL Level)
Operating Voltage	5.0V ± 0.1V DC
Measurement Range	0 - 5.00 mg/m³
Resolution	0.01 mg/m³
Response Time	≤ 30 seconds
Operating Temperature	-10°C to 40°C
Dimensions	32mm x 25mm x 16mm
Service Life	Approx. 3 years in air

6 reviews

Anonymous

Mar 31, 2026

Rating: 4/5

Good sensitivity, needs warm-up

The sensor works well but requires about 3 minutes of warm-up time before the readings stabilize. Once warmed up, it detects formaldehyde changes quickly. Documentation could be slightly more detailed.

Anonymous

Mar 29, 2026

Rating: 5/5

Reliable industrial component

Bought this for a custom ventilation control system. It has been running continuously for two weeks without drift. The build quality is solid and the pinout is clearly marked on the PCB.

Anonymous

Mar 26, 2026

Rating: 5/5

Perfect for my air quality monitor project

This sensor module integrated seamlessly with my ESP32 setup. The UART communication is stable and the data readings seem consistent when compared to a reference meter. Great value for DIY enthusiasts.

Anonymous

Mar 21, 2026

Rating: 4/5

Solid performance for the price

Works as advertised. The voltage level is truly TTL compatible which saved me from needing extra logic converters. Only minor issue is the connector isn't included, so you need to solder headers yourself.

Anonymous

Mar 12, 2026

Rating: 5/5

Excellent for environmental monitoring

I am using this to monitor off-gassing in a new furniture workshop. The resolution of 0.01 mg/m³ is sufficient to catch small spikes. Highly recommend for professional prototyping.

Anonymous

Mar 07, 2026

Rating: 3/5

Works but tricky for beginners

The sensor itself is fine, but if you don't know how to parse UART data strings, you might struggle. Would be nice to have a sample Arduino library linked in the product description. Eventually got it working though.

5 FAQ

Q: Is a separate heating circuit required for operation?

A: No, the module contains the necessary conditioning circuitry internally. You only need to supply 5V DC power to the VCC and GND pins.

Q: Does this module output analog voltage or digital data only?

A: This ZE08-CH2O module outputs digital data via the UART interface. It does not provide an analog voltage output proportional to concentration.

Q: Can this sensor detect other gases like benzene or VOCs?

A: No, this electrochemical sensor is specifically calibrated for Formaldehyde (CH2O). While extreme concentrations of other gases might cause minor cross-sensitivity, it is not designed or recommended for detecting benzene or general VOCs.

Q: What is the baud rate for the UART communication?

A: The default baud rate is 9600 bps. Please refer to the specific datasheet protocol section for frame structure details.

Q: How do I calibrate the sensor if the readings drift over time?

A: The sensor features an automatic baseline correction function when exposed to clean air for a prolonged period. For precise calibration, a zero-point calibration in fresh air and a span calibration with a standard gas source are recommended per the manual.

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