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O3-B4

O3-B4
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Ozone O3-B4 Ozone Sensor 4-Electrode 4-Electrode Technical Specification Figure 1 O3-B4 Schematic Diagram Top View PERFORMANCE Sensitivity Response time Zero current Noise* Range Linearity Overgas limit Bottom View Side View nA/ppm at 100ppb O3 t90 (s) from zero to 100ppb nA in zero air at 20oC ±2 standard deviations (ppb equivalent) ppm O3 limit of performance warranty ppb error at full scale, linear at zero and 2ppm O3 maximum ppm for stable response to gas pulse * Tested with Alphasense ISB low noise circuit LIFETIME Zero drift Sensitivity drift Operating life ppb equivalent change/year in lab air % change/year in lab air, monthly test months until 50% original signal (12 month warranted) ENVIRONMENTAL Sensitivity @ -20°C Sensitivity @ 50°C Zero @ -20°C Zero @ 50°C CROSS SENSITIVITY H2S sensitivity NO2 sensitivity Cl2 sensitivity NO sensitivity SO2 sensitivity CO sensitivity H2 sensitivity C2H4 sensitivity NH3 sensitivity CO2 sensitivity KEY SPECIFICATIONS Temperature range Pressure range Humidity range Flow rate Bias voltage Storage period Load resistor Weight % measured gas @ % measured gas @ % measured gas @ % measured gas @ % measured gas @ % measured gas @ % measured gas @ % measured gas @ % measured gas @ % measured gas @ °C kPa % rh non-condensing minimum sccm during calibration V months @ 3 to 20°C (stored in sealed pot) Ω (ISB circuit is recommended)) g NOTE: all sensors are tested at ambient environmental conditions, with 10 ohm 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. Alphasense Ltd, Sensor Technology House, 300 Avenue West, Skyline 120, Great Notley. CM77 7AA. UK Telephone: +44 (0) 1376 556 700 Fax: +44 (0) 1376 335 899 E-mail: sensors@alphasense.com Website: www.alphasense.com

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Perf erformance Data O3-B4 Performance Data Figure 2 Sensitiivity Temperature Dependence % Output (referenced to 20oC) Figure 2 shows the temperature dependence of sensitivity at 100ppb O3. This data is taken from a typical batch of sensors. Figure 3 Zero Temperature Dependence (corrected) Figure 3 shows the variation in zero output of the working electrode caused by changes in temperature, expressed as nA. This data is taken from a typical batch of sensors. Contact Alphasense for futher information on zero current correction. Figure 4 shows response to 200ppb O3. Use of Alphasense ISB...

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