Combustible Gas Pellistor Methane Sensor 0-50%LEL Methane CH-A3

 

PERFORMANCE
Sensitivity mV / % methane 15 to 21
Response time t90 from air to 50% LEL methane (s) < 15 (typically < 7)
Zero mV in zero air ±20
Range % LEL methane 0 to 100
Linearity % methane when 5% non-linear 6

ENVIRONMENTAL
Sensitivity @ -20°C % sensitivity change, referenced to 20°C < 100.5 to 105.5
Sensitivity @ 50°C % sensitivity change, referenced to 20°C < 100 to 103
Zero @ -20°C % LEL change, referenced to 20°C < +0.5 to -2
Zero @ 50°C % LEL change, referenced to 20°C < 0 to -1.5
Temperature Range Certification to T4 -40° to +55°C
Humidity 12% sensitivity loss from 0% to 80 % rh (22°C)
Typical zero increase % LEL from 0 to 80 %rh (22°C) 1.0
Pressure Sensitivity change from 0 to 75 kPa (gauge) < 3%

INHIBITION/POISONING
Chlorine 12hrs 20ppm Cl2, 50 % sensitivity loss, 2 day recovery < 10% loss
Hydrogen Sulfide 12hrs 40ppm H2S, 50 % sensitivity loss, 2 day recovery < 50% loss
HMDS hrs until 50% activity loss @ 10ppm HMDS 9
Optional H2S disposable filter can be ordered. Part no. ASF-1

ELECTRICAL
Voltage V (±0.2 V) 3.0
Power consumption mW 190
Voltage sensitivity % sensitivity change / 0.1V change 3

KEY SPECIFICATIONS
Weight g < 26
Operating life months until 75% original sensitivity (24 month warranted) > 24