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Air Quality Monitor


A VOC monitor, or a volatile organic compound monitor, is a device used to measure the levels of volatile organic compounds (VOCs) in the air. We offer advanced semi-conductor based reliable, efficient and cost effective VOC monitor and controller. VOC can be monitored at Duct, plenum or space mounting providing total flexibility to suit all applications. The Sensor continuously tracks the indoor VOC and odor and this signal is then delivered to the Central Controller for necessary control to dynamically modulate the Ozone output from Duct mounted Units via Variable Load Controller to eliminate increased VOC, odor and smoke.

The VOC sensor is suitable to detect multiple VOC's present in the Indoor environment and deliver the signals based on the TVOC. The sensor is designed for continuous operation. It provides a 0 to 10 VDC analog signal for interface to BMS. The VOC sensor and controller is fully factory wired and assembled and field wiring is limited to only input and output connections. All in one neat, compact enclosure for easy, economical and quick installation.

Options Available Wall Mounted / Duct Mounted
Type Gas sensitive semiconductor (GSS)
Meter Range 0 – 500 ppm
Least Count 1 PPM
Accuracy <± 10%
Display 4 X 20 vacuum florescent display (VFD)
Relay set point User adjustable
Enclosure casing Flame resistant thermoplast PS
Alarm Setting Settable Throughout The Range
Operating temperature -5° C to 40° C
Operating relative humidity 5% to 95% non-compensating
Digital output RS 232
Digital output RS 232
Analog output 0 – 5 VDC
Relay output 24 V; 5A (MAX), 220 V AC, 2 Amp
Power supply 11 - 24 VDC; 2.1 mm plug with centre +ve

Carbon Dioxide Monitor & Controller

A carbon dioxide (CO2) monitor and controller is a device that measures the concentration of carbon dioxide in the air and controls the level in an enclosed space by regulating the HVAC system or activating ventilation fans. A CO2 monitor and controller helps to maintain a healthy indoor environment by constantly measuring the concentration of carbon dioxide in the air and regulating ventilation systems and air conditioning. The device typically uses infrared technology to detect carbon dioxide and displays the concentration in parts per million (ppm) on a digital display.

Carbon dioxide monitors and controllers are commonly used in buildings where there are high occupancy numbers such as classrooms, offices, and conference rooms, as well as in industrial settings. By continuously monitoring and controlling carbon dioxide levels, they help to improve indoor air quality, promote occupant health and well-being, and increase energy efficiency.

Model OZ-AIR SM-55-CO2
Sensor Type Non-Dispersive Infrared Detector (NDIR)
System type Duct / Field Mountable
Accuracy ± 2% of Reading
Measuring range
  • CO2
  • Temperature
  • Humidity
  • Display


  • 0 – 5000 PPM
  • 0-100 oC
  • 0-100 % RH
  • 4 Digits, 7 Segment LCD With PPM Indicator
Self-Diagnostics LCD Error Indication
Audio & Visual Alarm High Level Settable Throughout The Range
Analogue voltage O/P 3 X 4-20 mA for CO2, Air Quality & Temperature
Alarm setting Settable Throughout The Range
Alarm output 1 No, Potential Free Contacts
Modbus Interface For CO2, Air Quality & Temperature
Power supply 220-230 VAC / 50 Hz / 1 PE / 5.0 W