Humans respirate Volatile Organic Compounds (VOCs) as well as CO2. The BAPI sensor measures these VOCs and indicates when a space is occupied just as well as a CO2 sensor.
The advantage of the VOC sensor is that it measures air contaminants from other sources besides respiration, such as building materials, cleaners, perfumes and furniture and carpet off-gassing. Using this sensor for Demand Controlled Ventilation then is a way of achieving true indoor air quality, rather than just CO2 dilution.
A further benefit is that it requires no additional work on your part. That’s because the sensor converts the VOC reading to a CO2 equivalent level. This lets you use ASHRAE’s CO2-based VRP schedule to ventilate. (More information on the CO2 equivalent output is available on the “Application Notes” tab below.)
The Duct unit samples duct air using an aspiration tube. The Rough Service unit features a ventilated BAPI-Box and is ideal for rough service areas such as outdoor air plenums, equipment rooms, attics, green houses and warehouses.
VOC Sensing Element | Micro-machined Metal Oxide |
---|---|
VOC Detection Range | 0 to 2,000 ppm CO2 Equivalent |
Operating Environment (Temperature) | 32F to 122F (0C to 50C) |
Response Time | Less Than 60 Seconds |
Start-Up Time | 15 minutes |
Operating Environment (Humidity) | 0 to 95% RH Non-Condensing |
Unventilated BAPI-Box Rating | NEMA 4, IP66 |
Power | 12 to 24 VDC, 50 mA Peak; 18 to 24 VAC, 1.5 VA Peak |
Enclosure Material | Polycarbonate, UL94 V-0 |
Analog Outputs | 0 to 5VDC or 0 to 10VDC >10KΩ impedance; VOC Contaminants: 0 to 2,000 PPM CO2 Equivalent |
Download Product Information:
VOC Duct and Rough Service Sensor Datasheet
BAPI VOC Sensor Offers an Alternative to CO2 for Demand Controlled Ventilation
Common Volatile Organic Compounds Detected by BAPI’s VOC Sensor
Using the BAPI VOC Sensor for Demand Controlled Ventilation
VOC Duct and Rough Service Sensor Installation and Operating Instructions
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