Gastec 17 快速氟化氢测量探测管 HF(0.25-100ppm)

Indicator: 0.5 to 20 ppm
Measuring Range: 
+ 0.25 to 0.5 ppm, Number of Pump Strokes 7
+ 0.5 to 20 ppm, Number of Pump Strokes 4
+ 20 to 100 ppm, Number of Pump Strokes 1
Sampling Time: 45 second per pump stroke
Colour Change: Yellow → Brown
Reaction Principle: HF + Indicator → Chemical reaction compound
Coefficient of Variation: 10% (for 0.5 to 5 ppm), 5% (for 5 to 20 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Manual tube

Performance
Measuring Range
0.25 to 0.5 ppm 0.5 to 20 ppm 20 to 100 ppm
Number of Pump Strokes
7 4 1
Correction Factor
1/2 1 5
Sampling Time 45 seconds per pump stroke
Detecting Limit 0.1 ppm (n=7)
Colour Change Yellow → Brown
Reaction Principle Hydrogen fluoride reacts with indicator to produce brownish pink colour.
HF + Indicator → Chemical reaction compound
Coefficient of Variation 10% (for 0.5 to 5 ppm), 5% (for 5 to 20 ppm)
Shelf Life 3 Years
Corrections for temperature & humidity Humidity 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
Hydrogen chloride, Nitric acid 1/5 time + Brown
Chlorine, Nitrogen dioxide 1/10 time + Brown
Other substance measurable with this detector tube
Substance Correction Factor pump stroke Temperature Absolute Humidity Colour Change
Fluorine 2.5 1 20ºC (68ºF) 9 mg/L Produces a brown stain
1.0 1 20ºC (68ºF) 3 mg/L Produces a brown ring stain
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
0.5ppm(2014) C2 ppm(2014)  

 

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