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Specifications

Sensidyne Tube 139U — Specifications
Measuring range20-1,500 ppm
Sampling time1.5 minutes/1 pump stroke
Detectable limit10 ppm
Shelf life2 years
Operating temperature10 – 40 °C
Colour changeYellow → Pale blue (The top of discoloured layer is Brown.)
Reaction principleChromium oxide is reduced