Formaldehyde Gas Detector - Threshold Alert Sensor (0-20ppm)

The Formaldehyde Detection Sensor is a compact safety monitoring module designed to identify hazardous HCHO levels in indoor environments. This formaldehyde threshold detection unit provides instant visual indication when concentrations exceed recognized safety limits, enabling rapid response in homes, offices, laboratories, and industrial spaces. Built for straightforward integration with automation or monitoring systems, the gas detection module operates across a wide 5–24V DC power range and delivers simple digital high/low signals. The compact air‑quality monitoring sensor supports continuous operation while maintaining stable long‑term performance for indoor environmental safety monitoring.

Note: The threshold of this sensor is factory-fixed and cannot be modified by the user. Custom threshold parameters can be set for bulk orders.

Instant Formaldehyde Hazard Alerts

This HCHO monitoring module focuses on threshold-based safety detection rather than complex measurement output. When formaldehyde concentration surpasses the preset safety threshold of 0.075mg/m³ (0.06ppm), the air quality detection unit immediately triggers a high-level signal and visual indicator. Such simplified alert logic enables rapid hazard recognition in indoor environments where formaldehyde exposure may lead to respiratory irritation or long-term health risks.

Wide Voltage Compatibility for Easy Integration

Designed for flexible deployment, this environmental gas detection board supports a broad 5–24V DC operating voltage range. Compatibility with common industrial controllers, automation systems, and embedded electronics simplifies installation without additional voltage regulation circuits. The digital high/low signal output also enables direct integration into alarm systems, ventilation control setups, or environmental monitoring networks.

Clear Visual Status Indication

An onboard indicator light provides immediate visual confirmation of environmental conditions. When surrounding air contains formaldehyde levels above the preset threshold, the integrated LED illuminates to signal a potential hazard. This built‑in alert mechanism allows quick visual checks in smart buildings, laboratories, classrooms, or enclosed spaces where continuous environmental awareness is required.

Stable Long‑Term Operation and Durable Construction

Engineered for dependable indoor deployment, this formaldehyde sensing module maintains signal stability of less than 2% drift per month and responds to concentration changes within 15 seconds. A flame‑retardant PVC enclosure protects internal components while supporting reliable operation across temperatures from -10°C to 50°C. The compact 47.4mm enclosure allows discreet installation in air monitoring equipment, safety systems, or ventilation control assemblies.

Accurate concentration measurement applications requiring quantitative data may consider the MEMS Formaldehyde HCHO Gas Detection Sensor, which provides precise gas concentration monitoring capabilities.

Figure: Dimension Diagram of Formaldehyde Sensor

Figure: Connection Port Diagram of Formaldehyde Sensor

Typical deployments include smart building safety monitoring, indoor air quality alert systems, HVAC ventilation control, and workplace environmental protection. The threshold-based gas detection sensor offers a practical safety layer for spaces where formaldehyde exposure risks require immediate visual and digital alerts.