Gases to be measured: SULPHUR DIOXIDE
Quantity of tubes/box: 10
Measuring range：1-60 ppm
Number of pump strokes: 1（100ml)
Sampling time: 1 minute/1 pump stroke
Detectable limit: 0.5 ppm
Shelf life: 3 years
Operating temperature: 0～40℃
Reading: Direct reading from the scale calibrated by 1 pump stroke
Colour change: pink→yellow
