iSense 1% & 30% CO2 Level Controller - NEMA4

iSense 1% & 30% CO2 Level Controller - NEMA4
iSense 1% & 30% CO2 Level Controller - NEMA4
iSense 1% & 30% CO2 Level Controller - NEMA4
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  • CM-0042-WP-NM

  • CM-0043-WP-NM

  • CM-0044-WP-NM

  • CM-0045-WP-NM

  • CM-0108

For large quantities, please contact

Browse more CO2 Monitor or additional CO2Meter products.

CM-0042-NM - IAQ
CM-0043-NM - Greenhouse
CM-0044-NM - OSHA
CM-0045-NM - High Concentration


The iSense doesn't just measure CO2 levels - it controls them.

  • Control a Fan or Damper(IAQ and OSHA)
  • Control CO2 Delivery (Greenhouse & High Concentration)
  • Relay rugged High-Voltage and High-Amperage 
  • RS485 MODBUS, 4-20 mA / 0 -10V Outputs
  • Spray Water Resistant NEMA Level 4 Enclosure
  • Hydrophobic filters stopping moisture and spore 

CO2 Level Controller Greenhouse

Most inexpensive CO2 controllers skimp on parts like CO2 sensors and relays. The CO2 Level Controller is different: it combines our accurate K-30 NDIR infrared CO2 sensor with an industrial-quality relay capable of controlling up to 10 amps and 250 volts.

Their are four models available:

IAQ Model - controls a damper, fan or other HVAC device to keep the CO2 levels below 1,000ppm. The industrial-quality relay closes at 1,000ppm and opens again at 600ppm. 

Greenhouse Model  - controls CO2 delivery via a CO2 generator or a pressurized CO2 tank control valve. The industrial-quality relay opens at 1,500ppm and closes again at 1,200ppm.  Plug this unit into the same timer that controls your light source for a complete indoor greenhouse growing solution.

OSHA - for control /alarms in industrial or storage applications operate at 5,000 ppm releases at 4,500ppm.

HIGH CONCENTRATION - 0-30% CO2 range for fermentation and incubation applications. Programmable range: specify operate and release levels in special instructions when ordering.  Default set for 5% incubation level. Can be user-programmed via RS-485 cable.

All CO2 Level Controllers are designed to be wall-mounded, and include a 110VAC-24VDC adapter and 10ft of wire. The removable screw terminal block with well-marked connections on the PCB make this a very simple device to install. 


For direct communication or user programing the level controller through your computer's USB port will need an RS485 Cable available here. (CM-0108) With it, you can interface with the sensor using our free GasLab® software available here and change the parameters of the level controller to your specifications.


  • CO2 Measurement: non-dispersive infrared (NDIR)
  • Sensor Life Expectancy: > 15 years
  • Maintenance Interval: no maintenance required
  • Self-Diagnostics: complete function check of the sensor module
  • Warm-up Time: < 1 min. (@ full specs < 15 min)
  • Spray water resistant enclosure
  • Dimensions: 2.5 x 5 x 1 inches (WxLxH)
  • Specifications for IAQ, Greenhouse, OSHA Models

    • Measurement Range: 0-2,000 ppm analog output
    • Programmable Range: 0-10,000 ppm (custom configuration required)
    • Repeatability: ± 20 ppm ± 1 % of measured value
    • Accuracy: ± 30 ppm ± 3 % of measured value

    Specifications for High Concentration Model

    • Measurement Range: 0-300,000 ppm (0-30%)
    • Programmable Range: (custom configuration required)
    • Default relay set for 5% incubation
    • Accuracy: ± 0.2% vol CO2 ± 3% of measured value


    • 277V, 10A relay included
    • IAQ version: Relay closed: 1,000ppm, open 600ppm
    • Greenhouse version: Relay open 1,500ppm, closed 1,200ppm
    • OSHA version: Relay closed: 5000 ppm, open 4500 ppm
    • High Concentration: User programmed or specify during ordering. Default 5.0% open 4.5% close


    • 120-220VAC - 24VDC International wall power supply included
    • USB- RS485 Bridge Cable - 5 meter length is not included.  To purchase please see CM-0108.


    • 1 year

    CO2 level controller manual Manual (pdf)

    Dimensional Drawings (pdf)