Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Model Number | CJSH22-CH2O |
| Detection Target | Formaldehyde (CH2O) & VOCs |
| Operating Voltage | 3.3V - 5V DC |
| Communication Interface | UART / TTL |
| Measurement Range | 0.00 - 5.00 mg/m³ |
| Resolution | 0.01 mg/m³ |
| Response Time | < 30 Seconds |
| Operating Temperature | -10°C to 50°C |
| Module Dimensions | 32mm x 22mm x 10mm |
| Average Power Consumption | < 50mA |
Anonymous
Apr 05, 2026
Rating: 5/5
Excellent for IoT projects
Integrated smoothly with my ESP32. Data output is stable and the documentation was clear.
Anonymous
Mar 31, 2026
Rating: 3/5
Sensitive to interference
Be careful with alcohol vapors nearby as it may affect the VOC reading slightly.
Anonymous
Mar 10, 2026
Rating: 5/5
Accurate readings
Compared well against a professional meter during testing. Very satisfied with the precision.
Anonymous
Feb 26, 2026
Rating: 4/5
Good value sensor
Works as described. Takes a minute to warm up before readings stabilize.
Anonymous
Feb 03, 2026
Rating: 5/5
Compact and efficient
Low power draw is great for battery devices. Fits easily into small enclosures.
Q: Is calibration needed out of the box?
A: Factory calibrated, recalibration suggested annually for high precision.
Q: What is the expected lifespan?
A: Approximately 5 years under normal operating conditions.
Q: Does it detect Carbon Monoxide?
A: No, this module is specific to Formaldehyde and general VOCs.
Q: Are connecting cables included?
A: Pin headers are included, but wires are sold separately.
Q: Is this Arduino compatible?
A: Yes, sample libraries and code are available in the documentation package.
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