Rae QRAE 3 - Critical Warnings and Cautions

54
Sensor Specifications
Combustible Sensor
Range
Resolution
Catalytic bead LEL
0 to 100% LEL
1% LEL
Electrochemical Sensors
Range
Resolution
Carbon Monoxide (CO)
0 to 500 ppm
1 ppm
Hydrogen Cyanide (HCN – 4R Sensor)
0 to 50 ppm
0.5 ppm
Hydrogen Cyanide (HCN – 3R Sensor)
0 to 50 ppm
0.2 ppm
Hydrogen Sulfide (H
2
S)
0 to 100 ppm
0.1 ppm
Sulfur Dioxide (SO
2
)
0 to 20 ppm
0.1 ppm
Oxygen (O
2
)*
0 to 30% Vol.
0.1% Vol.
Ammonia (NH
3
)
0 to 100 ppm
1 ppm
Phosphine (PH
3
)
0 to 20 ppm
0.01 ppm
Chlorine (Cl
2
)
0 to 50 ppm
0.05 ppm
Nitrogen Dioxide (NO
2
)
0 to 50 ppm
0.1 ppm
* Only use the liquid electrolyte O
2
sensor in the QRAE 3. Use of other types can degrade
performance.
All specifications are subject to change without notice.
LEL Range, Resolution & Response Time
LEL 0-100% 1 % 15 sec
Caution:
Refer to RAE Systems Technical Note TN-144 for LEL sensor poisoning.