Gastec 12LL 氰化氢HCN气体检测管(0.2~10ppm)

Vạch chỉ thị: 0.2 ~ 5 ppm
Thang đo: 
+ 0.2 ~ 5 ppm, bơm 2 lần
+ 5 ~ 10 ppm, bơm 1 lần
Thời gian lấy mẫu: 1.5 phút mỗi lần bơm
Chuyển đổi màu: vàng sang hồng
Hệ số biến đổi: 5% (0.2 ~ 5 ppm) 
Số ống trong hộp: 10
Dùng thích hợp với bơm: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range 0.2 to 5 ppm 5 to 10 ppm
Number of Pump Strokes 2 1
Correction Factor 1 2
Sampling Time 1.5 minutes per pump stroke
Detecting Limit 0.05 ppm (n=2)
Colour Change Yellow → Pink
Reaction Principle Hydrogen Cyanide reacts with the reagent to form intermediate material which stains indicator pink .
Coefficient of Variation 5% (for 0.2 to 5 ppm) 
Shelf Life 2 Years
Corrections for temperature & humidity Unnecessary
Store the tubes at cool and dark place.
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Ammonia 2.2 ppm No discolouration
Hydrogen Chloride 1.6 ppm + Pink at 2.0 ppm
Nitric Acid 2.0 ppm + Pink at 3.0 ppm
Sulphur Dioxide 0.5 ppm + Pink at 0.6 ppm
Nitrogen Dioxide 5.0 ppm + Pale pink at 5.5 ppm
Hydrogen Fluoride 10.0 ppm + Pink at 15.0 ppm
Hydrogen Sulphide   + Pink
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
- C 4.7 ppm 5.6 to 40%

 

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