Personal O2 Safety Monitor

The SAN-20 Personal O2 Safety Monitor is designed for employees who work in enclosed areas where oxygen depletion may cause personal harm.

In stock


Description / Personal O2 Safety Monitor


  • Large LCD display: O2, temperature, %RH
  • Audible, visual strobe and vibrating alarms
  • Programmable alarm settings
  • Man down alarm - leverages accelerometer technology
  • Rugged design with metal clip, protective rubber enclosure
  • NEW! Rechargeable Li-Ion battery – 72+ hours per charge
  • Calibrate using ambient air
  • No over-exposure or negative memory effects
  • IP54 housing protects against dust and rain



Oxygen Sensor

  • Measurement Range: 0 to 25.0% vol.
  • Resolution: 0.1% vol.
  • Sensing Method: Fluorescence quenching by oxygen
  • Temperature Range: 14-140°F (-10.0-60.0°C) display
  • Humidity Range: 0 to 99% RH
  • Response Time: <15 seconds
  • Expected Lifespan: > 2 years

Temperature Sensor

  • Display Resolution: 0.1°F (0.1°C)
  • Display Options: °F/°C (switchable)
  • Accuracy: +0.9°C(+0.5°F)
  • Response Time: 5~30 seconds (device must equilibrate with environment)

Humidity Sensor

  • Measurement Range: 0.0 to 99.9% RH
  • Display Resolution: 1%RH
  • Accuracy: +4.5%RH
  • Response Time: < 8 seconds for 63% of step change


  • Operating: 32°F to 122°F (0°C to 50°C), <95% RH non-condensing
  • Storage: 14°F to 140°F (-10°C to 60°C), < 99% RH non-condensing
  • Power Supply: Li-ion battery (4.2V, 1500mAh), 
  • Dimensions: 3.9 x 2.0 x 1.7 in. (98x50x42mm)
  • Weight: 4.76oz. (135 grams)


  • Micro USB Power Cable w. Wall USB Charger
  • Durable Industrial Clip
  • User Manual


  • 1 year - See CryoFX® Terms and Conditions.

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