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CH-A3 Combustible Gas Pellistor
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Product Details
Brand Name: | Alphasense | Place of Origin: | United Kingdom | Model Number: | CH-A3 |
Usage: | Gas Sensor | Theory: | Other, Combustible Gas Pellistor |
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 |
Contact Us
- Week technology ltd
- Contact nameCherry
- Phone86-0755-83289036-843
- Address16 Floor, Building #3, Zhongke Mansion, Gaoxin South Shenzhen,Guangdong
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