NO-B4
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NO-B4 - 1

NO-B4 Nitric Oxide Sensor 4-Electrode 4-Electrode Technical Specification Figure 1 NO-B4 Schematic Diagram Top View PERFORMANCE Sensitivity Response time Zero current Noise* Range Linearity Overgas limit Bottom View Side View nA/ppm at 2ppm NO t90 (s) from zero to 2ppm NO nA in zero air at 20°C ±2 standard deviations (ppb equivalent) ppm NO limit of performance warranty ppb error at full scale, linear at zero and 5ppm NO maximum ppm for stable response to gas pulse * Tested with Alphasense ISB low noise circuit Zero drift Sensitivity drift Operating life ENVIRONMENTAL Sensitivity @ -20°C Sensitivity @ 50°C Zero @ -20°C Zero @ 50°C ppb equivalent change/year in lab air % change/year in lab air, monthly test months until 50% original signal (12 month warranted) (% output @ -20°C/output @ 20°C) @ 2ppm NO (% output @ 50°C/output @ 20°C) @ 2ppm NO nA change from 20°C nA change from 20°C CROSS SENSITIVITY H2S sensitivity % measured gas NO2 sensitivity % measured gas Cl2 sensitivity % measured gas SO2 sensitivity % measured gas H2 sensitivity % measured gas CO sensitivity % measured gas NH3 sensitivity % measured gas CO2 sensitivity % measured gas O3 sensitivity % measured gas Halothane sensitivity KEY SPECIFICATIONS Bias voltage Temperature range Pressure range Humidity range Storage period Load resistor Weight mV (working electrode potential is above reference electrode) °C kPa % rh continuous months @ 3 to 20°C (stored in sealed pot) Ω (ISB circuit is recommended) g At the end of the product’s life, do not dispose of any electronic sensor, component or instrument in the domestic waste, but contact the instrument manufacturer, Alphasense or its distributor for disposal instructions. 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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NO-B4 - 2

Perf erformance Data NO-B4 Performance Data Figure 2 Sensitivity Temperature Dependence 140 Figure 2 shows the temperature dependence of sensitivity at 2ppm NO. This data is taken from a typical batch of sensors. Figure 3 Zero Temperature Dependence 400 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 NO. Technical Specification Use of Alphasense ISB circuit reduces...

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