iSense Remote Oxygen Safety Alarm - NEMA4

iSense Remote Oxygen Safety Alarm - NEMA4
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  • CM-0180

  • CM-0181

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Browse more Oxygen Monitor or additional CO2Meter products.

CM-0180 25% O2
CM-0181 95% O2

The iSense Remote Oxygen Safety Alarm is designed to monitor oxygen levels in a remote location up to 10 feet away. The oxygen level transmitter is tethered to a data-logging display unit that shows O2 levels in real time. The display includes built-in memory, so it can be connected to a computer to download the logged data, or using optional radios, the data can be remotely transmitted to a PC in another area.


  • Oxygen Depletion
  • Nitrogen or CO2 Storage
  • Open Flame in Enclosed Areas
  • Welding Shops Storing C25
  • Pharma or Cryogenic Processing

In addition, the iSense includes a relay that can actively control ventilation, and a built-in buzzer to warn when O2 levels fall below a programmed limit.

Free Easy-to-use GasLab® Software 

This device uses GasLab® software for setup, calibration, data logging, and real-time data analysis. GasLab® makes it easy to export data into a .CSV file that can be imported into any industry-standard software or spreadsheet. GasLab® runs on Windows XP or higher, and free to use with our products.

Download Latest Software Here


  • Measure up to 25% & 95% Oxygen Levels Accurately
  • Non-Consumptive Technology - Does Not "Wear Out"
  • Automatic or Manual Calibration
  • Calibrate in room air or any known O2 Concentration 
  • 0-10V, 4-20mA or RS485 Output
  • Use AQ500 controller to Create Custom O2 Sensing Systems

Specifications: Display Unit

  • 24VDC Input
  • 30VDC 1 A Relay with NC and NO contacts
  • Alarm level 18.5% default, programable 
  • Maintenance Interval: no maintenance required
  • Self-Diagnostics: complete function check of the sensor module
  • Warm-up Time: < 15 min. (@ full specs < 30 min)

Specifications: Transmitter Unit

  • Measurement Range: 0 – 25% or 0-95% Oxygen
  • Sensing Method: Zirconium Dioxide (ZrO2)
  • Sampling Method: Diffusion
  • Diffusion Response Time: 4 seconds max
  • Sensitivity: ± 20 ppm ± 1 % of measured value
  • Accuracy: 2% full scale
  • Pressure Range: 2 to 3,000 mbar


  • Power Input: 24VDC ±10%
  • Current Consumption: 600 mA @ 24VDC
  • NEMA4: Splash Resistant Enclosure
  • Dimensions: 4.72 x 3.15 x 3.15 inches


  • Analog: Linear 2-10 VDC or 4-20 mA
  • Digital: RS-485


  • Sensor: 3 Years
  • Electronics: 1 Year

Manual Manual (pdf)

Dimensional Drawings (pdf)