DFRobot Threshold Formaldehyde HCHO Detection Sensor (0-20ppm) - Fixed Threshold Module
The DFRobot Threshold Formaldehyde HCHO Detection Sensor is a dedicated module for monitoring hazardous HCHO levels in air, featuring a fixed alarm threshold of 0.06ppm. It provides a simple digital high/low output signal for easy integration with Arduino, Raspberry Pi, industrial PLCs, and other 5-24V DC control systems.
Features
- Fixed threshold detection at 0.075mg/m³ (0.06ppm) for immediate hazard alerting.
- Wide operating voltage range from 5V to 24V DC for flexible system integration.
- Fast response time of less than 15 seconds to changes in formaldehyde concentration.
- Built-in LED status indicator provides instant visual confirmation of alarm state.
- Compact, flame-retardant PVC housing ensures durability and safe installation.
Out of stock
This professional-grade formaldehyde (HCHO) detection sensor operates on a fixed-threshold principle, triggering a digital output signal when the preset safety limit of 0.06ppm is exceeded. It utilizes a stable electrochemical sensing element designed for long-term monitoring without the need for user calibration.
The module is engineered for reliability in demanding environments, featuring a wide operating temperature range from -10°C to 50°C and a robust PVC housing. Its simple high/low logic output makes it directly compatible with microcontrollers, PLC digital inputs, and alarm systems, providing a straightforward solution for real-time air quality safety monitoring.
Additional Information
| Weight | 0.025 kg |
|---|---|
| Dimensions | 12 × 9 × 4 cm |













