iSense 1% & 30% CO2 Level Controller - NEMA4

iSense 1% & 30% CO2 Level Controller - NEMA4
Regular price $499.00

POs or wholesale quantity discounts click here

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

  • Control a Fan or Damper (IAQ and OSHA)
  • CO2 Delivery or Enrichment (Greenhouse & High Concentration)
  • Spray Water Resistant NEMA Level 4 Enclosure
  • Hydrophobic filters stopping moisture and spore 

Most inexpensive CO2 controllers skimp on parts like long-lasting CO2 sensors and high-quality 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 / 250 volts (2500 Watts).


This device will NOT meet requirements for CO2 safety monitoring which requires a Fixed/Wall mounted, hard-wired alarm per the NBIC, NFPA, or IFC regulations. Refer to our CO2 Safety Products page for devices that meet your needs.

Call us at (877) 678-4259 toll-free or email us to speak with our technical sales team about purchasing the correct device.


CM-0042-NM - IAQ Model - controls a damper, fan, or another HVAC device to keep the CO2 levels below 1,000ppm. The industrial-quality relay closes at 1,000ppm and opens again at 600ppm. 

CM-0043-NM - 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.

CM-0044-NM - OSHA - for control /alarms in industrial or storage applications operate at 5,000 ppm releases at 4,500ppm.

CM-0045-NM - 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-mounted, 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. 

Specifications (ALL)

  • 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)
  • 1/8"ID x 1/4" OD x 1/16" Wall Clear PVC Tubing
  • 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 - See CO2Meter Terms and Conditions. 

    For direct communication or user programming the level controller through your computer's USB port will need a CM-0108 RS485 Cable available here.

    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.

    • Data Sheets

    • Manuals

    • Technical Documents

    • Videos

    • Additional Resources

    Customer Reviews

    Based on 1 review

    "Easy to install, easy to set up, and easy calibration - just what I was looking for."

    - Phillip Farrar
    Water Plant Superintendent

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