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COH-A2 Carbon Monoxide + Hydrogen Sulfide Sensor (CO + H2S Sensor)
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MOQ: 1 Piece (Price negotiable depending on order volume and customization)
Key Specifications
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Brand Name:
Alphasense
Place of Origin:
United Kingdom
Model Number:
COH-A2
Payment & Shipping
Payment Methods:
Port of Shipment:
HK
Delivery Detail:
7 days
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Brand Name
Alphasense
Place of Origin
United Kingdom
Model Number
COH-A2
Usage
Gas Sensor
Theory
Other, Electrochemical Gas Sensor
COH-A2 Carbon Monoxide + Hydrogen Sulfide Sensor Introduction
Personal gas safety monitors can be found in almost every industry, with the requirement for multiple gas detection becoming commonplace. Most of these gas detectors measure both Carbon Monoxide and Hydrogen Sulfide.
Alphasense new 2sense H2S+CO gas sensor allows designers to reduce significantly their gas detector size and cost. The patented 2sense uses a new approach to dual gas sensor design.
A larger version of the D2 sensor, which has a proven track record in the field over many years, the 2sense does not compromise performance or long term stability over the standard two-sensor solution when measuring both H2S and CO.
2Sense Dual Gas
Save space and save cost with our 2Sense family of dual gas sensors, in the A-series 20mm size.
With a patented design and best response, these dual sensors offer the required performance with obvious advantages.
CO / H2S the COH-A2 builds on 10 years of experience with our original D2 sensor.
Carbon Monoxide (CO) Sensor Specification
| Carbon Monoxide Sensor PERFORMANCE | ||
| Sensitivity |
nA/ppm in 400ppm CO |
50 to 100 |
| Response time |
t90 (s) from zero to 400ppm CO |
|
| Zero current |
ppm equivalent in zero air |
-3 to +3.5 |
| Resolution |
rms noise (ppm equivalent) |
|
| Range |
ppm CO limit of performance warranty |
1,000 |
| Linearity |
ppm error at full scale, linear at zero and 400 ppm CO |
10 to 40 |
| Overgas limit |
maximum CO for stable response to gas pulse |
5,000 |
| Carbon Monoxide Sensor LIFETIME | ||
| Zero drift |
ppm equivalent change/year in lab air |
|
| Sensitivity drift |
% change/year in lab air, monthly test |
|
| Operating life |
months until 80% original signal (24 month warranted) |
24 |
| Carbon Monoxide Sensor ENVIRONMENTAL | ||
| Sensitivity @ -20℃ |
% (output @ -20℃/output @ 20℃) @ 100ppm CO |
35 to 45 |
| Sensitivity @ 50℃ |
% (output @ 50℃/output @ 20℃) @ 100ppm CO |
120 to 140 |
| Zero @ -20℃ |
ppm equivalent change from 20℃ |
0 to 5 |
| Zero @ 50℃ |
ppm equivalent change from 20℃ |
0 to -20 |
| Carbon Monoxide Sensor CROSS SENSITIVITY | ||
| Filter Capacity |
ppm-hours of Hydrogen Sulfide |
nd |
| H2S sensitivity |
% measured gas @ 20ppm H2S |
|
| H2 sensitivity |
% measured gas @ 400ppm H2 @ 20℃ |
|
| NO2 sensitivity |
% measured gas @ 10ppm NO2 |
|
| Cl2 sensitivity |
% measured gas @ 10ppm Cl2 |
|
| NO sensitivity |
% measured gas @ 50ppm NO |
|
| SO2 sensitivity |
% measured gas @ 20ppm SO2 |
|
| C2H4 sensitivity |
% measured gas @ 400ppm C2H4 |
|
| NH3 sensitivity |
% measured gas @ 20ppm NH3 |
|
| Carbon Monoxide Sensor KEY SPECIFICATIONS | ||
| Temperature range |
℃ |
-30 to 50 |
| Pressure range |
kPa |
80 to 120 |
| Humidity range |
%rh continuous (see note below) |
15 to 90 |
| Storage period |
months @ 3 to 20℃ (stored in sealed pot) |
6 |
| Load resistor |
Ω (recommended) |
10 to 47 |
| Weight |
g |
|
Hydrogen Sulfide (H2S) Sensor Specification
| Hydrogen Sulfide Sensor PERFORMANCE | ||
| Sensitivity |
nA/ppm in 20ppm H2S |
600 to 950 |
| Response time |
t90 (s) from zero to 20ppm H2S @ 20℃ |
|
| Zero current |
ppm equivalent in zero air |
0 to -0.3 |
| Resolution |
rms noise (ppm equivalent) |
|
| Range |
ppm H2S limit of performance warranty |
200 |
| Linearity |
ppm error at full scale, linear at zero and 20ppm H2S |
0 to -3 |
| Overgas limit |
maximum ppm H2S for stable response to gas pulse |
400 |
| Hydrogen Sulfide Sensor LIFETIME | ||
| Zero drift |
ppm equivalent change/year in lab air |
|
| Sensitivity drift |
% change/year in lab air, monthly test |
|
| Operating life |
months until 80% original signal (24 month warranted) |
24 |
| Hydrogen Sulfide Sensor ENVIRONMENTAL | ||
| Sensitivity @ -20℃ |
% (output @ -20℃/output @ 20℃) @ 20ppm H2S |
80 to 90 |
| Sensitivity @ 50℃ |
% (output @ 50℃/output @ 20℃) @ 20ppm H2S |
105 to 115 |
| Zero @ -20℃ |
ppm equivalent change from 20℃ |
|
| Zero @ 50℃ |
ppm equivalent change from 20℃ |
|
| Hydrogen Sulfide Sensor CROSS SENSITIVITY | ||
| NO2 sensitivity |
% measured gas @ 10ppm NO2 |
|
| Cl2 sensitivity |
% measured gas @ 10ppm Cl2 |
|
| NO sensitivity |
% measured gas @ 50ppm NO |
|
| SO2 sensitivity |
% measured gas @ 20ppm SO2 |
|
| CO sensitivity |
% measured gas @ 400ppm CO |
|
| H2 sensitivity |
% measured gas @ 400ppm H2 |
|
| C2H4 sensitivity |
% measured gas @ 400ppm C2H4 |
|
| NH3 sensitivity |
% measured gas @ 20ppm NH3 |
|
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Business Type
Distributor/Wholesaler
Year Established
2014
Overseas Office
Yes
Total Employees
101 - 200 People
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