| CO-A4 Carbon Monoxide Sensor CO Sensor PERFORMANCE |
| Sensitivity |
nA/ppm in 2ppm CO |
220 to 375 |
| Response time |
t90 (s) from zero to 10ppm CO |
< 20 |
| Zero current |
nA in zero air at 20°C |
-100 to +10 |
| Noise* |
±2 standard deviations (ppb equivalent) |
20 |
| Range |
ppm limit of performance warranty |
500 |
| Linearity |
ppm CO error at full scale, linear at zero, 15ppm CO |
< ± 1 |
| Overgas limit |
maximum ppm for stable response to gas pulse |
2000 |
| * Tested with Alphasense AFE low noise circuit |
| |
|
|
| CO-A4 Carbon Monoxide Sensor CO Sensor 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 |
| |
|
|
| CO-A4 Carbon Monoxide Sensor CO Sensor ENVIRONMENTAL |
| Sensitivity @ -20°C |
(% output @ -20°C/output @ 20°C) @ 5ppm CO |
50 to 85 |
| Sensitivity @ 50°C |
(% output @ 50°C/output @ 20°C) @ 5ppm CO |
110 to 125 |
| Zero @ -20°C |
nA change from 20°C |
10 to 40 |
| Zero @ 50°C |
nA change from 20°C |
-120 to -200 |
| |
|
|
| CO-A4 Carbon Monoxide Sensor CO Sensor CROSS SENSITIVITY |
| Filter capacity |
ppm·hrs H2S |
250,000 |
| H2S sensitivity |
% measured gas @ 5ppm H2S |
< 0.1 |
| NO2 sensitivity |
% measured gas @ 5ppm NO2 |
< -2 |
| Cl2 sensitivity |
% measured gas @ 5ppm Cl2 |
< 0.1 |
| NO sensitivity |
% measured gas @ 5ppm NO |
< -2 |
| SO2 sensitivity |
% measured gas @ 5ppm SO2 |
< 0.1 |
| H2 sensitivity |
% measured gas @ 100ppm H2 at 20°C |
< 10 |
| C2H4 sensitivity |
% measured gas @ 100ppm C2H4 |
< 0.5 |
| NH3 sensitivity |
% measured gas @ 20ppm NH3 |
< 0.1 |
| |
|
|
| CO-A4 Carbon Monoxide Sensor CO Sensor 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 (AFE circuit is recommended) |
33 to 100 |
| Weight |
g |
< 6
|
