iSense CO2 level controller

CO2Meter iSense-sampling-level-controller_medium

Available models:

ESCM-43-NM – Greenhouse
ESCM-45-NM – High Concentration

The iSense measures and controls CO2 levels.

  • Control a Fan or Damper (IAQ)
  • 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 or IP65 Enclosure
  • Hydrophobic filters stopping moisture and spore 


The iSense CO2 Level Controller combines our accurate NDIR infrared CO2 sensor with an industrial-quality relay capable of controlling up to 10 amps and 250 volts. The iSense CO2 Level Controller comes either pre-programmed or you can program your own CO2 levels to turn relays on and off.

The iSense CO2 sensor has a lifespan of up to 15 years and no calibration or maintenance is required.


There are three models available:

  • CO2 Level Controller GreenhouseGreenhouse 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. Rated IP65 for complete, indoor environmental protection.
  • 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.
  • 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 3m of wire. The removable screw terminal block with well-marked connections on the PCB make this a very simple device to install.


related products



CO2Meter GasLab_grandeFor direct communication or user programing the level controller through your computer’s USB port. With it, you can interface with the sensor using our free GasLab® software 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 and greenhouse 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
  • Environmental Protection: IP65 or NEMA-4


specifications for high concentration model
  • CO2Meter CM-0042-NEMA-CO2-kit_1024x1024Measurement 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



Download ESCM iSense CO2 Level Controller Manual