Gas Sensor

So2-b4 sulfur dioxide sensor so2 sensor 4-electrode - so2-b4
temperature range : -30 to 50 ℃
pressure range : 80 to 120 kpa
humidity range : 15 to 90 % rh continuous (see note below)
storage period : 6 months @ 3 to 20°c (stored in sealed pot)
load resistor : 33 to 100 ω (isb circuit is recommended)
weight :
model number: so2-b4
product specification
so2-b4 sulfur dioxide sensor 4-electrode
performance
sensitivity nappm at 2ppm so2 275 to 475
response time t90 (s) from zero to 2ppm so2
zero current na in zero air at 20℃ -80 to +80
noise* ±2 standard deviations (ppb equivalent) 5
range ppm limit of performance warranty 100
linearity ppb error at 100ppm so2 , linear at zero and 10ppm so2 0 to -2
overgas limit maximum ppm for stable response to gas pulse 200
* tested with alphasense isb low noise circuit
lifetime
zero drift ppb equivalent changeyear in lab air
sensitivity drift % changeyear in lab air, monthly test
operating life months until 50% original signal (24 month warranted) > 36
environmental
sensitivity @ -20℃ (% output @ -20℃output @ 20℃) @ 2ppm so2 70 to 82
sensitivity @ 50℃ (% output @ 50℃output @ 20℃) @ 2ppm so2 95 to 110
zero @ -20℃ na change from 20℃ 0 to -10
zero @ 50℃ na change from 20℃ 10 to 30.