Product Introduction
1. H2S-A4 Hydrogen Sulfide Sensor (H2S Sensor) Description
Alphasense's hydrogen sulfide gas sensors use fuel cell technology.
H2S-A4 Hydrogen Sulfide Sensor Dimensions:
Diameter 20mm, industrial standard size for portable gas detectors
When measuring current concentration ranges from ppb to 1% H2S, it has high sensitivity and low zero value, enabling accurate and stable readings.
2. H2S-A4 Hydrogen Sulfide Sensor (H2S Sensor) Typical Applications
Air quality trace hydrogen sulfide monitoring, hydrogen sulfide gas transmitters.
3. H2S-A4 Hydrogen Sulfide Sensor (H2S Sensor) Performance
| Sensitivity | 2ppmH2S，nA/ppm | 1400~1850 |
| Response Time t90 | From zero to 2ppm H2S (s) | <45 |
| Zero Current | Output in zero air at 20°C (nA) | -250 to 100 |
| Interference* | Average interference (ppb) | 5 |
| Range | H2S warranty detection range (ppm) | 50 |
| Linearity | Full scale error, linear at 0-110ppm H2S | < ± 0.5 |
| Overload | Maximum ppm for stable response to gas pulses | 100 |
4. H2S-A4 Hydrogen Sulfide Sensor (H2S Sensor) Lifespan
| Zero Drift | Change in ppm per year in laboratory air | <±100 |
| Sensitivity Drift | Percentage change per year in laboratory air | <20 |
| Operating Life | Time until output drops to 80% of original signal (months) (warranty 12 months) | 24 |
5. H2S-A4 Hydrogen Sulfide Sensor (H2S Sensor) Environment
| Sensitivity at -20°C | At 2ppm, (output at -20°C / output at 20°C) % | 80-92 |
| Sensitivity at 50°C | At 2ppm, (output at 50°C / output at 20°C) % | 100-110 |
| Zero at -20°C | Change in ppm relative to 20°C | 30~50 |
| Zero at 50°C | Change in ppm relative to 20°C | 90~110 |
6. H2S-A4 Hydrogen Sulfide Sensor (H2S Sensor) Compatible Sensor Circuit Board:
Analog Front End (AFE) A4 Series Air Quality Sensor - AFE
Based on product design, A4 series air quality sensors need to be used with an analog front end (AFE): Since portable monitoring devices require compact size, we have designed the circuit board with high component density, saving valuable space for your monitoring device. Based on product design, A4 series air quality sensors need to be used with an analog front end (AFE): Since portable monitoring devices require compact size, we have designed the circuit board with high component density, saving valuable space for your monitoring device. Now simply connect the AFE and A4 sensor to a multiplexed ADC to quickly record air quality data.
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