Gastec 159 Quick-measuring Detector tubes Tetrahydrofuran (C4H8O 159 (20~800ppm))

Indicator: 50 to 800 ppm
Measuring Range: 
+ 20 to 50 ppm, Number of Pump Strokes 2
+ 50 to 800 ppm, Number of Pump Strokes 1
Sampling Time: 3 minute per pump stroke
Colour Change: Pink → Pale Blue
Reaction Principle: C4H8O + Cr6+ + H2SO4 → Cr3+
Coefficient of Variation: 15% (for 50 to 200 ppm), 10% (for 200 to 800 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
20 to 50 ppm 50 to 800 ppm
Number of Pump Strokes
2 1
Correction Factor
0.4 1
Sampling Time 3 minutes per pump stroke
Detecting Limit 2 ppm (n=2)
Colour Change Pink → Pale Blue
Reaction Principle C4H8O + Cr6+ + H2SO4 → Cr3+
Coefficient of Variation 15% (for 50 to 200 ppm), 10% (for 200 to 800 ppm)
Shelf Life 3 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   + Pale blue
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
1.4-Dioxane by scale 2 25 to 140 ppm
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
50 ppm 100 ppm 2 to 11.8%
  • 质量承诺
  • 正品保修
  • 送货到家
  • 交易简单化