Technical specifications Version 1.0 H2S-B4 Hydrogen Sulfide Sensor – 4-Electrode Bottom View Bottom View Side View Side View PERFORMANCE Performance Sensitivity Sensitivity Response time Response Zero current time Zero current Noise* Noise Range Range Linearity Linearity Overgas Overgas limit limit * nA/ppm at 2ppm H2S 1450 to 2600 nA/ppm at 2ppm H S 1450 to 2600 < 60 t90 (s) from zero to 2ppm H2S t90 (s) from zero to 2ppm H S < 60 nA in zero air at 20°C -250 to 200 nA in zero air at 20°C -250 to 200 ±2 standard deviations (ppbequivalent) equivalent) 1 ±2 standard deviations (ppb 1 100 ppm H2S limit limitperformance warranty ppm H S of of performance warranty 100 ppb error at full scale, linearatat zero 40ppm40ppm 24 Operating months until 50% original monthly test Operating life months until 50% original signal (24 month warranted) 77 to 90 Sensitivity @ 50°C % (output @ 50°C/output @ @ 20°C) @ ENVIRONMENTAL Sensitivity @ -20°C (% output @ -20°C/output 20°C) @ 2ppm H S2ppm H100 to 110 S 77 to 90 2 Zero @ -20°C nA change from 20°C 50 to 60 Sensitivity @ 50°C (% output @ 50°C/output @ 20°C) @ 2ppm H2S 100 to 110 Zero @ 50°C nA change from 20°C -120 to -160 Zero @ -20°C nA change from 20°C 50 to 60 Zero @ NO sensitivity nA change from gas @ 5ppm 50°C 20°C -120 to -160 % measured NO < -10 2 Cross Sensitivity Cl2 sensitivity % measured gas @ 5ppm Cl2 sensitivity % measured gas @ 5ppm NO2 NO NO sensitivity % measured gas @ 5ppm SO2 sensitivity % measured gas @ 5ppm sensitivity % measured gas @ 5ppm Cl2 SO2 CO sensitivity measured gas @ 5ppm % measured gas @ 5ppm CO sensitivity % NO H2 sensitivity % measured gas @ 100ppm H2 sensitivity % measured gas @ 5ppm SO2 C2H4 sensitivity % measured gas @ 100ppm C2H sensitivity % measured gas @ 5ppm CO NH 4 NH3 sensitivity % measured gas @ 20ppm 3 sensitivity % measured gas @ 100ppm H2 CO2 CO2 sensitivity % measured gas @ 5% NO2 Cl2 NO SO2 CO H2 C2H4 sensitivity % measured gas @ 100ppm C2H4 Temperature range °C Key Specifications NH3 sensitivity % measured gas @ 20ppm NH3 Pressure range kPa CO2 sensitivity % measured gas @ 5% CO2 CROSS SENSITIVITY Humidity range Storage period Temperature range°C Load resistor Pressure range kPa Weight Humidity range Storage period Load resistor Weight % rh continuous months @ 3 to 20°C (stored in sealed pot) � (ISB circuit is recommended) g % rh months @ 3 to 20°C (stored in sealed pot) Ω (ISB circuit is recommended) g For further information on the performance of this sensor, on other sensors in the range or any other subject, please contact Alphasense Ltd. or visit our website at “www.alphasense.com”. At the end of the productʼs life, do not dispose of any electronic sensor, component or instrument in the domestic waste, but contact the instrument manufacturer, Alphasense or i

Technical specifications Version 1.0 Perf erformance Data H2S-B4 Performance Data Figure 1 Sensitivity Temperature Dependence Perf erformance Data H2S-B4 Performance Data Figure 2 Sensitivity Temperature Dependence Figure 2 shows the temperature dependence of sensitivity at 2ppm H2S. % Output (referenced (referenced to 20oC) % % Output (referenced to 20oC) Outputto 20oC) Figure 2 Sensitivity Temperature Dependence H2S-B4 Performance Data Perf erformance Data 100 110 This data is taken from a typical Figure 2 shows the temperature Figure 1 shows batch of sensors. the temperature dependence of...