Measuring range: 50-900 ppm
Number of pump strokes: 1（100ml）
Sampling time: 1 minute/1 pump stroke
Detectable limit: 5 ppm
Shelf life: 3 years
Operating temperature: 0～40℃
Reading: Direct reading from the scale calibrated by 1 pump stroke
Colour Colour change: Pale purple→Pale yellow
