• Combustible Gas Pellistor
  • Combustible Gas Pellistor
Mouse over image to zoom

Combustible Gas Pellistor

ISweek online 2h ago

ISweek_com

Send Inquiry Chat Now

  • Price

    Price on request   ≥1piece

  • Model Number

    CH-A3

  • Data Sheet

  • Package

    Original packaging

  • Specs

    CH-A3

  • Quantity

    - +

  • Send Inquiry

Product Description

CH-A3 Combustible Gas Pellistor Description
Alphasense flammable gas pellistors are available in two housing sizes: A for fixed installation applications and A or D for portable applications.

The innovative design of the Alphasense pellistor range provides high quality, low power (only 190mW) and excellent poison resistance. All pellistors are housed in certified flameproof chambers.

CH-A3 is a drop-in (20mm diameter) replacement to existing products with improved stability and poison resistance.

CH-A3 Combustible Gas Pellistor PERFORMANCE
Sensitivity
 mV / % methane
 15 to 22
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



CH-A3 Combustible Gas Pellistor 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%



CH-A3 Combustible Gas Pellistor 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



CH-A3 Combustible Gas Pellistor ELECTRICAL
Voltage
 V (±0.2 V)
 3.0
Power consumption
 mW
 190
Voltage sensitivity
 % sensitivity change / 0.1V change
 3



CH-A3 Combustible Gas Pellistor KEY SPECIFICATIONS
Weight
 g
 < 26
Operating life
 months until 75% original sensitivity (24 month warranted)
 > 24

Sensitivity
Hydrocarbon/Gas
 % Sensitivity relative to Methane
 % LEL Sensitivity to Methane
Hydrogen
 130 to 140
 160 to 175
Propane
 150 to 190
 350 to 450
Butane
 150 to 180
 420 to 500
n-Pentane
 180 to 200
  600 to 670
Nonane
 150 to 170
 800 to 950
Carbon Monoxide
 42 to 44
  17 to 18
Acetylene
 150 to 170
 300 to 340
Ethylene
 150 to 170
 270 to 320
Isobutylene
  180 to 200
 450 to 500