Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Detection Gas	Formaldehyde (CH2O)
Sensor Type	Electrochemical
Output Interface	UART Serial (TTL Level)
Operating Voltage	5.0V ± 0.2V DC
Measurement Range	0 - 5 ppm
Resolution	0.01 ppm
Response Time	≤ 60 seconds (T90)
Operating Temperature	-20°C to 50°C
Operating Humidity	15% - 90% RH (Non-condensing)
Expected Lifespan	2 Years (in air)

6 reviews

Anonymous

Mar 27, 2026

Rating: 4/5

Good accuracy, needs warm-up time

We used this for a prototype indoor air quality station. It requires about 3-5 minutes of warm-up before readings stabilize, but once running, it tracks formaldehyde spikes well during furniture off-gassing tests.

Anonymous

Mar 25, 2026

Rating: 4/5

Solid performance for the price

The serial protocol is straightforward to parse. I appreciated the low power consumption in idle mode. Only minor issue is that high humidity can cause slight drift, but that is expected for electrochemical sensors.

Anonymous

Mar 12, 2026

Rating: 3/5

Works well but sensitive to cross-gas

The sensor works as described for formaldehyde, but I noticed it reacts slightly to strong alcohol vapors. Make sure to place it away from cleaning supplies if you want pure CH2O readings. Otherwise, good hardware.

Anonymous

Mar 12, 2026

Rating: 5/5

Compact and reliable

Small form factor made it easy to fit into our custom enclosure. The voltage requirements are standard 5V which simplifies power design. Very happy with the purchase for our smart home sensor array.

Anonymous

Mar 10, 2026

Rating: 5/5

Exactly what I needed

Bought this to monitor new carpet emissions in my office. It detected elevated levels immediately after installation and slowly dropped over weeks as expected. Great tool for peace of mind.

Anonymous

Mar 01, 2026

Rating: 5/5

Perfect for DIY Air Quality Monitors

This module integrated seamlessly with my ESP32 project. The UART output is stable and the readings seem consistent when compared to a professional meter. Documentation was clear enough to get started quickly.

5 FAQ

Q: How often does the sensor need calibration?

A: For most DIY and general monitoring applications, factory calibration holds for the life of the sensor (approx. 2 years). For critical industrial safety applications, we recommend annual verification against a known standard.

Q: Does this module come with a cable or do I need to solder headers?

A: The module typically comes with pin headers pre-soldered, but no connecting cables are included. You will need to use jumper wires or solder your own connections depending on your setup.

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

A: The default baud rate for the ZE08-CH2O module is 9600 bps. This can sometimes be configured via specific command frames if your application requires a different speed.

Q: Is there a library available for Arduino?

A: Yes, several open-source libraries exist for the ZE08 series on GitHub and the Arduino Library Manager. Search for 'ZE08' or 'Formaldehyde Sensor' to find community-maintained drivers that handle the parsing automatically.

Q: Can this sensor detect other VOCs like benzene?

A: No, this is an electrochemical sensor specifically calibrated for Formaldehyde (CH2O). While extreme concentrations of other gases might cause minor interference, it is not designed or certified to detect benzene or general VOCs accurately.

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