| Gas Sensors |
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| TRANSMITTER SPECIFICATIONS: |
| Input voltage |
required |
+7.5 to +35.0 Volts DC |
| Output |
at zero gas concentration |
4mA (user adjustable) |
| Output |
at full-scale |
20mA (user adjustable) |
| Stability |
Stability |
< 0.05mA(< 0.25% Full Scale) |
| Maximum load |
@ 20mA, 24 VDC |
825ohms |
| Supply voltage |
dependence < ±2%output from |
+7.5 to +35 Volts DC |
| Transmitter |
current requirement |
< 100mA |
| Operating conditions see sensor data sheet specifications |
| Calibration |
Multi-turn |
zero and span potentiometers |
| Power supply protection Diode protection to voltage regulator |
| No-power equivalent circuit (for Toxic gas versions) Sensor short-circuited during power-down |
| Full-scale gas concentration Pre-calibrated |
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| PERFORMANCE: |
| Sensitivity |
nA/ppm in 400ppm CO |
80 to 120 |
| Response time |
t90 (s) from zero to 400ppm CO |
< 30 |
| Zero current |
ppm equivalentin zero air |
< ±2 |
| Resolution |
RMS noise (ppm equivalent) |
< 0.3 |
| Range |
ppm limit of performance warranty |
1,000 |
| Linearity |
ppm CO error at full scale, linear at zero, 400ppm CO |
< ±15 |
| Overgas range |
maximum ppm for stable response to gas pulse |
10,000 |
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| LIFETIME: |
| Zero drift |
ppm equivalent change/year in lab air |
<0.2 |
| Sensitivity drift |
% change/year in lab air, monthly test |
< 3 |
| Operation life |
months until 80% original signal (24 month warranted) |
> 24 |
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| ENVIRONMENTAL: |
| Sensitivity @ -20°C |
% (output @ -20°C/output@20°C) @ 400ppmCO |
65 to 85 |
| Sensitivity @ 50°C |
% (output @ 50°C /output@20°C) @ 400ppmCO |
105 to 115 |
| Zero @ -20°C |
ppm equivalent change from 20°C |
±2 |
| Zero @ 50°C |
ppm equivalent change from 20°C |
< 3 |
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| CROSS SENSITIVITY: |
| Filter capacity |
ppm-hrs H2S |
160,000 |
| Filter capacity |
ppm-hrs NO |
120,000 |
| Filter capacity |
ppm-hrs NO2 |
120,000 |
| Filter capacity |
ppm-hrs SO2 |
160,000 |
| SO2 sensitivity |
%measured gas @ 20ppm SO2 |
< 0.1 |
| NO sensitivity |
%measured gas @ 50ppm NO |
< 25 |
| NO2 sensitivity |
%measured gas @ 10ppm NO2 |
< 0.1 |
| Cl2 sensitivity |
%measured gas @ 10ppm Cl2 |
<0.1 |
| H2 sensitivity |
%measured gas @ 400ppm H2 at 20C |
65 |
| C2H4 sensitivity |
%measured gas @ 400ppm C2H4 |
65 |
| H2S sensitivity |
%measured gas @ 20ppm H2S |
0.1 |
| NH3 sensitivity |
%measured gas @ 20ppm NH3 |
0.1 |
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Note: All sensors are tested at ambient environmental conditions with 10ohm load resistor unless otherwise stated. As applications of use are outside our control the information provided is given without legal responsibility. Customers should test under their own conditions to ensure that the sensors are suitable for their own requirements.
In the interest of continued product improvement we reserve the right to change design features and specifications without prior notification. The data contained in this document is for guidance only. Jeff Cooper Controls Ltd accepts no liability for any consequential losses, injury or damage resulting from the use of this document or the information contained within it. |
