NO2-A43F Nitrogen Dioxide Sensor 4-Electrode Patented All dimensions in millimetres (± 0.15mm) Bottom View Side View Response time t90 (s) from zero to 2ppm NO2 < 60 Zero current nA in zero air at 20°C -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 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 Filter capacity (ppm hrs) sensitivity % measured gas sensitivity % measured gas sensitivity % measured gas sensitivity % measured gas sensitivity % measured gas sensitivity % measured gas sensitivity % measured gas sensitivity % measured gas sensitivity % measured gas sensitivity % measured gas KEY SPECIFICATIONS Temperature range °C -30 to 40 Humidity range % rh continuous 15 to 85 Storage period months @ 3 to 20°C (stored in sealed pot) 6 Load resistor Q (AFE circuit recommended) 33 to 100 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 47 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: [email protected] Website: www.alphasense.com

Figure 4 shows response from from 200ppb NO2 to 0ppb NO2. Use of Alphasense AFE circuit reduces noise to 15ppb, with the opportunity of digital smooting to reduce noise even further. Offset voltage is due to intentional AFE circuit electronic offset. NO2-A43F Performance Data Figure 3 Zero temperature dependence 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. For further information on the performance...