| CO-B4 Carbon Monoxide Sensor (CO Sensor) 4-Electrode PERFORMANCE |
| Sensitivity |
nA/ppm at 2ppm CO |
420 to 650 |
| Response time |
t90 (s) from zero to 10ppm CO |
< 25 |
| Zero current |
nA in zero air at 20℃ |
+30 to -130 |
| Noise* |
±2 standard deviations (ppb equivalent) |
4 |
| Range |
ppm limit of performance warranty |
1000 |
| Linearity |
ppb CO error at full scale, linear at zero, 500ppm CO |
20 to 35 |
| Overgas limit |
maximum ppm for stable response to gas pulse |
2000 |
| * Tested with Alphasense ISB low noise circuit |
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| CO-B4 Carbon Monoxide Sensor (CO Sensor) 4-Electrode LIFETIME |
| Zero drift |
ppb equivalent change/year in lab air |
< ±100 |
| Sensitivity drift |
% change/year in lab air, monthly test |
< 10 |
| Operating |
life months until 50% original signal (24 month warranted) |
> 36 |
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| CO-B4 Carbon Monoxide Sensor (CO Sensor) 4-Electrode ENVIRONMENTAL |
| Sensitivity @ -20℃ |
(% output @ -20℃/output @ 20℃) @ 5ppm CO |
40 to 70 |
| Sensitivity @ 50℃ |
(% output @ 50℃/output @ 20℃) @ 5ppm CO |
110 to 125 |
| Zero @ -20℃ |
nA |
-30 to +30 |
| Zero @ 50℃ |
nA |
-50 to -200 |
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| CO-B4 Carbon Monoxide Sensor (CO Sensor) 4-Electrode CROSS SENSITIVITY |
| Filter capacity |
ppm·hrs H2S |
250,000 |
| H2S |
sensitivity % measured gas @ 5ppm H2S |
< 1 |
| NO2 |
sensitivity % measured gas @ 5ppm NO2 |
< 1 |
| Cl2 |
sensitivity % measured gas @ 5ppm Cl2 |
< 1 |
| NO |
sensitivity % measured gas @ 5ppm NO |
< -3 |
| SO2 |
sensitivity % measured gas @ 5ppm SO2 |
< 0.1 |
| H2 |
sensitivity % measured gas @ 100ppm H2 at 20 ℃ |
< 10 |
| C2H4 |
sensitivity % measured gas @ 100ppm C2H4 |
< 1 |
| NH3 |
sensitivity % measured gas @ 20ppm NH3 |
< 0.1 |
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| CO-B4 Carbon Monoxide Sensor (CO Sensor) 4-Electrode KEY SPECIFICATIONS |
| Temperature range |
°C |
-30 to 50 |
| Pressure range |
kPa |
80 to 120 |
| Humidity range |
% rh continuous |
15 to 90 |
| Storage period |
months @ 3 to 20°C (stored in sealed pot) |
6 |
| Load resistor |
Ω (ISB circuit is recommended) |
33 to 100 |
| Weight |
g |
< 13 |
