VOC-A4 Electrochemical VOC Sensors Description：

VOC-A4 Datasheet VOC-B4 Datasheet

Designed to work alongside our existing range of sensors, the VOC-A4 and B4 will detect a variety of compounds including Benzene, Formaldehyde and Ethanol. Both sensors have excellent response times, low power consumption and can be used in a bespoke circuit or with our individual sensor boards (ISB) in the case of the B4 or alongside other sensors in our multiport Analogue Front-End boards (AFE) in the case of the A4.

The Alphasense VOC electrochemical VOC-A4 and VOC-B4 sensors are the perfect companions for our amperometric 4-electrode air quality sensors. In environmental air quality applications, the VOC-A4 and VOC-B4 should be used in combination with one of our A-Series (CO-A4) or B-Series (CO-B4) Carbon Monoxide sensors. Although we recommend using these sensors at 0V for air quality applications, the voltage for both the VOC-A4 and VOC-B4 can be altered to operate at V, 0.1V, 0.2V or 0.3V, allowing the option to detect a range of different gases.

Suitable for various environmental air quality applications

Adaptable voltage from 0V to 0.3V

Available in both A-Series (20mm diameter, 16.5mm depth) and B-Series (32mm diameter, 16.5mm depth)

Can be adapted to measure Benzene, Formaldehyde, Ethanol, Toluene and Xylene

Minimal battery drain and maintenance

Excellent detection/response time

VOC-A4 sensor

VOC-A4 electrochemical sensor

20mm diameter, 16.5mm depth

4 electrodes

230 to 410 nA/ppm in 2ppm CO

< 30 t90 (s) from zero to 2ppm CO

± 200 nA in zero air at 20°C

VOC-B4 sensor

VOC-B4 electrochemical sensor

32mm diameter, 16.5mm depth

4 electrodes

400 to 700 nA/ppm in 2ppm CO

< 30 t90 (s) from zero to 2ppm CO

± 200 nA in zero air at 20°C