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أنظمة التحكم في الغرف النظيفة والمراقبة البيئية
VOC الاستشعار
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
مقدمة المنتج
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.
الخصائص الرئيسية
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.
مخاوف المنتج للعملاء
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.
تطبيقات نموذجية
Cleanroom solvent-vapor trendingCleaning process monitoringLaboratory air qualityVentilation demand indication
المعلمات الفنية
Typical construction values for a cleanroom VOC air quality sensor are shown below.
| المواد الأساسية | Metal-oxide semiconductor sensing element on FR-4 board in flame-retardant polycarbonate enclosure |
|---|---|
| سمك اللوحة | 25-45 mm housing depth |
| العرض الفعال | 80-120 mm housing width |
| الحد الأقصى الطول | Up to 150 mm enclosure height |
| الصلب يواجه سمك | 0 mm; non-metallic sensor housing |
| الكثافة الأساسية | 1180-1220 kg/m³ for polycarbonate enclosure parts |
| الموصلية الحرارية | 0.19-0.22 W/(m·K) for polycarbonate housing material |
| إنهاء السطح | Matte white housing with blue air-quality indicator and protected vent pattern |
| نوع المشترك | Snap-fit wall enclosure with rear terminal block and replaceable vent filter |
| التخصيص | متوفر على أساس التطبيق المقصود وبيئة التشغيل. |
الخيارات المتاحة
VOC index or equivalent concentration outputWall or duct mountAnalog or digital communicationIntegrated temperature and humidity compensation
Planning a VOC Sensor specification?
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