RAE Systems ToxiRAE 3 Single Gas Monitor


  • 0.1ppm resolution on Hydrogen Sulfide (H2S) sensor
  • Carbon monoxide (CO) sensor
  • Can record STEL, TWA, high and low alarms
  • Logs up to 10 events
  • Water- and dust-resistant
  • Audible, visual, and vibration alarm

This portable single-gas monitor is designed to keep workers safe against the threat of carbon monoxide (CO) and hydrogen sulfide (H2S). The ToxiRAE 3’s high-performance, three-electrode sensor delivers the fastest possible response time. When used with the AutoRAE Lite bump test and calibration station, it provides a low total cost of ownership (TCO) to organizations that are looking to protect workers and deliver worksite CO and H2S personal detection compliance. With its water and dust-resistant housing, and three-alarm capability, it’s a valuable tool for ensuring workers are aware of the presence of CO or H2S.

Gas Range Resolution
Hydrogen Sulfide (H2S) 0 to 100 ppm 0.1 ppm
Carbon Monoxide (CO) 0 to 500 ppm 1 ppm
Carbon Monoxide (CO), Ext. Range 0 to 1999 ppm 1 ppm
Size 3.4" L x 2.2" W x 0.8" H (8.6 cm x 5.5 cm x 2.0 cm)
Weight 3.5 oz (99 g) with battery
Battery User-replaceable 2/3 AA high-capacity lithium
  • 95 dB (at 30 cm) buzzer and flashing red LED to indicate exceeded preset limits
  • High: Displays "High" and emits 3 beeps and flashes per second
  • Low: Displays "Low" and emits 2 beeps and flashes per second
  • STEL: Displays "STEL" and emits 1 beep and flash per second
  • TWA: Displays "TWA" and emits 1 beep and flash per second
  • Vibration alarm
  • 6-LED visible alarm
Data logging 10 events
Response Time T90 < 12 seconds
IP Rating IP-67
EMI/RFI Highly resistant to EMI/RFI. Compliant with EMC directive 2004/108/EC
  • cCSAus: C1D1, Groups A, B, C, D, T4
  • ATEX: ExII 1G Ex ia IIC T4 Ga
  • IECEX: Ex ia IIC T4 Ga
Operating Temperature
  • Continuous: -4° to 140° F (-20° to +60° C)
  • Intermittent: -22° to 140° F (-30° to +60° C)
Humidity 0 to 95% relative humidity (non-condensing)
Warranty 2 years, including sensors and battery if used within specs
Calibration Two-point calibration for zero and span