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Measuring range: 4-40ppm/ 2-20ppm/ 0.4-4ppm
Number of pump strokes 1/2(50ml)/ 1(100ml)/ 5(500ml）
Sampling time: 1 minute/1 pump stroke
Detectable limit: 0.2ppm (500ml）
Shelf life: 3 years
Operating temperature: 0～40℃
Reading: Direct reading from the scale calibrated by 1 pump stroke
Colour change: Yellowish green→Pink
