Gastec 149 快速甲基丙烯酸甲酯测量探测管CH2:C(CH3)CO2CH3(10~500ppm)

Indicator: 10 to 200 ppm
Measuring Range: 
+ 10 to 200 ppm, Number of Pump Strokes 2
+ 200 to 500 ppm, Number of Pump Strokes 1
Sampling Time: 2 minute per pump stroke
Colour Change: Yellow → Pale blue
Reaction Principle: CH2:C(CH3)CO2CH3 + Cr6+ + H2SO4 → Cr3+
Coefficient of Variation: 10% (for 10 to 50 ppm), 5% (for 50 to 200 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
10 to 200 ppm 200 to 500 ppm
Number of Pump Strokes
2 1
Correction Factor
1 2.5
Sampling Time 2 minutes per pump stroke
Detecting Limit 1 ppm (n=2)
Colour Change Yellow → Pale blue
Reaction Principle CH2:C(CH3)CO2CH3 + Cr6+ + H2SO4 → Cr3+
Coefficient of Variation 10% (for 10 to 50 ppm), 5% (for 50 to 200 ppm)
Shelf Life 2 Years
Corrections for temperature & humidity Temperature correction is necessary
Store the tubes at cool and dark place.
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Alcohols, Esters, Ketones   + Pale blue
Other substance measurable with this detector tube
Tube 102L Reading (n=2) 10 20 30 50 100 150 200
Allyl isothiocyanate (%) 5 10 15 30 70 130 200
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
50 ppm 100 ppm 1.7 to 8.2%
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