UK Alphasense Carbon Monoxide/Hydrogen Sulfide Sensor (H2S+CO) Dual Gas Sensor - COH-A2

1. Carbon Monoxide/Hydrogen Sulfide Sensor (H2S+CO)Dual Gas SensorCOH-A2 Introduction:

COH-A2The sensor provides a unique approach in terms of external dimensions and electrode structure. A high-capacity filter on the carbon monoxide working electrode completely eliminates cross-sensitivity of the channel to hydrogen sulfide, acid gases, and similar gases like sulfur dioxide and nitrogen oxide. In portable instrument design, using the COH-A2 series sensor enables precise factory-level maintenance and field-level calibration of composite gases without worrying about incorrect adjustment of the CO channel.

2. Features of COH-A2 Carbon Monoxide/Hydrogen Sulfide Sensor (H2S+CO) Dual Gas Sensor

1. Can test CO and H2S gases
2. Electrochemical principle
3. 4-series size
4. CO range: 0~1000ppm, H2S range: 0~100ppm
5. Linear output
6. Resistant to interference from C2H4, H2, CL2

3. COH-A2 Carbon Monoxide Sensor Channel Technical Specifications:

Resolution: 0.5ppm
Response time t90 (seconds) <20s
Measurement range: 2000 ppm
Zero current <0~-4ppm
Sensitivity: 50-95 nA/ppm, 400ppm CO
Linearity: Full scale 10~40ppm error, linear 0-400ppm
Overload range: 5,000ppm / stable response to gas pulse concentration

4. COH-A2 Hydrogen Sulfide Sensor Channel Technical Specifications:

Resolution: <0.05ppm
Response time t90 (seconds) <30s
Measurement range: 200 ppm
Zero current: 0~-0.3ppm
Sensitivity: 700-1000 nA/ppm, 20ppm H2S
Linearity: Full scale 0~-3ppm error, linear 0-20ppm
Overload range: 500ppm / maximum concentration for stable response to gas pulse

Introduction

As the demand for multi-gas detection becomes increasingly common, personal safety gas detectors are now used in almost every industry. Most of these gas detectors can simultaneously detect carbon monoxide and hydrogen sulfide.
Using Alphasense's new dual gas (H2S+CO) sensor can significantly reduce the manufacturing cost and product size of designers' gas detectors. The Alphasense dual gas sensor is patented and adopts a new design concept.

The COH-A2 sensor is an enlarged version of the D2 sensor, whose reliable performance in the industry has been verified for many years. When measuring carbon monoxide and hydrogen sulfide simultaneously, the sensor's performance and long-term stability will not be degraded.

5. COH-A2 CO Sensor Channel Specifications

6. COH-A2 H2S Sensor Channel Specifications