iSense 30% CO2 Sampling Level Controller - NEMA4

iSense 30% CO2 Sampling Level Controller - NEMA4
iSense 30% CO2 Sampling Level Controller - NEMA4
iSense 30% CO2 Sampling Level Controller - NEMA4
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CM-0045-NM-SP - High Concentration

The iSense doesn't just measure CO2 levels - it controls them. With its built-in micro sampling pump, use it for

  • Fermentation and incubation where humidity results in condensation
  • High temperature environments such as combustion measurement
  • Low temperatures applications like cryogenic enclosures
  • Samples drawn from an inaccessible location
  • Sanitary protocols like pharmaceutical manufacturing that prohibit in-situ measurement
  • Transmitter and Controller applications

Most inexpensive CO2 controllers skimp on parts like CO2 sensors and relays. The CO2 Level Controller is different: it combines our accurate NDIR infrared CO2 sensor with a sample draw pump and an industrial-quality relay capable of controlling up to 10 amps and 250 volts, all inside a NEMA-rated enclosure.

Use our free GasLab® software to customize settings to your specifications. 


  • Controller and transmitter
  • Can trigger relay at any set point up to 30% CO2
  • Built-in 10,000 hour gas micro-sampling pump
  • Built-in high-voltage and high-amperage relay
  • RS485 MODBUS for level reporting and configuration
  • 4-20 mA output, programable scaling   
  • Spray water resistant NEMA enclosure
  • 1% (10,000 PPM) range available on request 


  • CO2 Measurement: non-dispersive infrared (NDIR)
  • Measurement Range: 0-300,000 ppm (0-30%)
  • Programmable Range 0-30% configuration via RS485 connection.
  • Accuracy: ± 0.2% vol CO2 ± 3% of measured value
  • 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: 4.5 x 7 x 2.5 inches (WxLxH)
  • Relay rated 277 VAC, 10A 
  • User programmable or specify during ordering 


  • Power supply w/ international plug kit 120-220 VAC 50/60 Hz - 24 VAC
  • RS485 - USB communications cable
  • M12 8 signal cable 2 meter (connection for 4-20, RS485 and Relay)
  • Filters for particulate and hydrophobic and condenser
  • Fittings and Tubing
  • Calibration certificate


  • 1 year

CO2 Level controller manual Manual (pdf)

CO2 Level controller drawing Dimensional Drawings (pdf)