Complete white VOC air quality sensor with blue indicator and protected vent pattern

Cleanroom Control and Environmental Monitoring Systems

VOC Sensor

A metal-oxide air quality sensor that tracks changing mixtures of volatile organic compounds and provides a compensated trend signal for ventilation or monitoring.

Metal-Oxide VOC Detection
Mixed-Gas Trend Signal
Humidity Compensation
Ventilation Control Output

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Product Introduction

The VOC air quality sensor uses a heated metal-oxide element whose surface resistance changes when reducing or oxidizing organic vapors are present. Embedded algorithms compensate for temperature and humidity effects and convert the raw response into a VOC index or equivalent concentration trend. The device is intended for changes in mixed indoor VOC load rather than identification of one specific compound. A ventilated wall or duct enclosure exposes the element to the monitored air while keeping power and communication terminals protected.

Key Features

Metal-oxide sensing responds to a broad range of common organic vapor changes.

Temperature and humidity compensation stabilizes the index across normal room conditions.

A trend-oriented output supports demand ventilation and environmental anomaly detection.

Wall and duct formats place the sensor where solvent or cleaning-vapor changes occur.

Customer Product Concerns

A broad VOC sensor reacts to mixtures and background changes, so it should not be treated as a compound-specific analytical instrument.

Users expect one VOC index to identify an individual chemical.The system presents the reading as a mixed-gas trend and uses compound-specific detectors where selectivity is required.

Humidity changes create an apparent VOC shift during HVAC transitions.Integrated humidity compensation reduces normal environmental cross-sensitivity.

A freshly installed sensor needs time to establish a stable background.Warm-up and baseline handling allow the metal-oxide element to settle before alarm evaluation.

Cleaning spray contacts the sensing surface directly.Protected diffusion openings and appropriate mounting separate the element from liquid droplets.

Typical Applications

Cleanroom solvent-vapor trendingCleaning process monitoringLaboratory air qualityVentilation demand indication

Technical Parameters

Typical construction values for a cleanroom VOC air quality sensor are shown below.

Core Material	Metal-oxide semiconductor sensing element on FR-4 board in flame-retardant polycarbonate enclosure
Panel Thickness	25-45 mm housing depth
Effective Width	80-120 mm housing width
Maximum Length	Up to 150 mm enclosure height
Steel Facing Thickness	0 mm; non-metallic sensor housing
Core Density	1180-1220 kg/m³ for polycarbonate enclosure parts
Thermal Conductivity	0.19-0.22 W/(m·K) for polycarbonate housing material
Surface Finish	Matte white housing with blue air-quality indicator and protected vent pattern
Joint Type	Snap-fit wall enclosure with rear terminal block and replaceable vent filter
Customization	Available based on the intended application and operating environment.

Available Options

VOC index or equivalent concentration outputWall or duct mountAnalog or digital communicationIntegrated temperature and humidity compensation

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