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| Type: | Electrochemical Gas Sensor |
| Conductivity Type: | Surface Type |
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OX-B431 O3 Sensor + NO2 Sensor Description
Alphasense is expanding its line of electrochemical toxic gas sensors to address industry-specific requirements, including emissions monitoring, process safety, environmental monitoring and VOCs.
Ozone (O3)
The new O3-B4 measures Ozone at low ppb concentrations. Low sensitivity to SO2 and repeatable sensitivity to NO2.
OX-B431 O3 Sensor + NO2 Sensor Features
| OX-B431 O3 Sensor Specification | ||
| OX-B431 O3 Sensor PERFORMANCE | ||
| Sensitivity | nA/ppm at 1ppm O3 | -225 to -550 |
| Response time | t90 (s) from zero to 1ppm O3 | < 45 |
| Zero current | nA in zero air at 20ºC | -50 to 70 |
| Noise* | ±2 standard deviations (ppb equivalent) | 15 |
| Range | ppm O3 limit of performance warranty | 20 |
| Linearity | ppm error at full scale, linear at zero and 20ppm O3 | < ±0.5 |
| Overgas limit | maximum ppm for stable response to gas pulse | 50 |
| * Tested with Alphasense AFE low noise circuit | ||
| OX-B431 O3 Sensor LIFETIME | ||
| Zero drift | ppb equivalent change/year in lab air | 0 to 20 |
| Sensitivity drift | % change/year in lab air, monthly test | < -20 to -40 |
| Operating life | months until 50% original signal (24 month warranted) | > 24 |
| OX-B431 O3 Sensor ENVIRONMENTAL | ||
| Sensitivity @ -20ºC | (% output @ -20ºC/output @ 20ºC) @ 2ppm O3 | 70 to 90 |
| Sensitivity @ 40ºC | (% output @ 40ºC/output @ 20ºC) @ 2ppm O3 | 95 to 125 |
| Zero @ -20ºC | nA | 0 to 25 |
| Zero @ 40ºC | nA | 5 to 100 |
| OX-B431 O3 Sensor CROSS SENSITIVITY | ||
| H2S | sensitivity % measured gas @ 5ppm H2S | < 170 |
| NO | sensitivity % measured gas @ 5ppm NO | < 5 |
| Cl2 | sensitivity % measured gas @ 5ppm Cl2 | < 90 |
| SO2 | sensitivity % measured gas @ 5ppm SO2 | < -7 |
| CO | sensitivity % measured gas @ 5ppm CO | < 0.1 |
| C2H4 | sensitivity % measured gas @ 100ppm C2H4 | < 0.1 |
| NH3 | sensitivity % measured gas @ 20ppm NH3 | < 0.1 |
| H2 | sensitivity % measured gas @ 100ppm H2 | < 0.1 |
| CO2 | sensitivity % measured gas @ 5% Vol CO2 | 0.1 |
| Halothane | sensitivity % measured gas @ 100ppm Halothane | < 0.1 |
| OX-B431 O3 Sensor KEY SPECIFICATIONS | ||
| Temperature range | ºC | -30 to 40 |
| Pressure range | kPa | 80 to 120 |
| Humidity range | % rh continuous | 15 to 85 |
| Storage period | months @ 3 to 20ºC (stored in sealed pot) | 6 |
| Load resistor | Ω (AFE circuit recommended) | 33 to 100 |
| Weight | g | < 6 |
|
OX-B431 NO2 Sensor Specification |
||
| OX-B431 NO2 Sensor PERFORMANCE | ||
| Sensitivity to NO2 | nA/ppm at 2ppm NO2 | -250 to -650 |
| Response time | t90 (s) from zero to 2ppm NO2 | < 35 |
| Zero current | nA in zero air at 20ºC | -50 to +70 |
| Noise* | ±2 standard deviations (ppb equivalent) | 15 |
| Range | ppm NO2 limit of performance warranty | 20 |
| Linearity | ppm error at full scale, linear at zero and 20ppm NO2 | < ±0.5 |
| Overgas limit | maximum ppm for stable response to gas pulse | 50 |
| * Tested with Alphasense AFE low noise circuit | ||
| OX-B431 NO2 Sensor LIFETIME | ||
| Zero drift | ppb equivalent change/year in lab air | 0 to 20 |
| Sensitivity drift | % change/year in lab air, monthly test | < -20 to -40 |
| Operating life | months until 50% original signal (24 month warranted) | > 24 |
| OX-B431 NO2 Sensor ENVIRONMENTAL | ||
| Sensitivity @ -20ºC | (% output @ -20ºC/output @ 20ºC) @ 2ppm NO2 | 70 to 90 |
| Sensitivity @ 40ºC | (% output @ 50ºC/output @ 20ºC) @ 2ppm NO2 | 95 to 110 |
| Zero @ -20ºC | nA | 0 to 25 |
| Zero @ 40ºC | nA | 5 to 50 |
| OX-B431 NO2 Sensor CROSS SENSITIVITY | ||
| H2S | sensitivity % measured gas @ 5ppm H2S | < 170 |
| NO | sensitivity % measured gas @ 5ppm NO | < 5 |
| Cl2 | sensitivity % measured gas @ 5ppm Cl2 | < 90 |
| SO2 | sensitivity % measured gas @ 5ppm SO2 | < -7 |
| CO | sensitivity % measured gas @ 5ppm CO | < 0.1 |
| C2H4 | sensitivity % measured gas @ 100ppm C2H4 | < 0.1 |
| NH3 | sensitivity % measured gas @ 20ppm NH3 | < 0.1 |
| H2 | sensitivity % measured gas @ 100ppm H2 | < 0.1 |
| CO2 | sensitivity % measured gas @ 5% Vol CO2 | 0.1 |
| Halothane | sensitivity % measured gas @ 100ppm Halothane | < 0.1 |
| OX-B431 NO2 Sensor KEY SPECIFICATIONS | ||
| Temperature range | ºC | -30 to 40 |
| Pressure range | kPa | 80 to 120 |
| Humidity range | % rh continuous | 15 to 85 |
| Weight | g | < 6 |
Beijing Zetron Technology Co., Ltd, formerly Beijing Senre Technology Co., Ltd was founded in 2006, located in Beijing with convenient transportation access. We have almost 16 years experience in the retail, import and export of gas detection and monitoring equipment.
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