Gastec 159L Quick-measuring Detector tubes Tetrahydrofuran C4H8O (5~232ppm)

Indicator: 5 to 80 ppm
Measuring Range:
+ 5 to 80 ppm, Number of Pump Strokes 1
+ 80 to 232 ppm, Number of Pump Strokes 1/2
Sampling Time: 2 minute per pump stroke
Colour Change: Pale yellow　→　Pale blue
Reaction Principle: C4H8O + Cr6+ + H3PO4 → Cr3+
Coefficient of Variation: 10% (for 5 to 10 ppm), 5% (for 10 to 80 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Catalog

Manual

Acrolein	30ppm	+	Pink when 30ppm or higher
Acetone	200ppm	No	Pink when 200ppm or higher
Acetic Acid	200ppm	No	No discolouration up to 400 ppm
Ethyl Acetate	1ppm	+	Pink when 2ppm or higher
Diethyl Ether	1ppm	+	Pale blue
Trichloroethylene	100ppm	No	Pink when 100ppm or higher
Toluene	1ppm	+	White when 4ppm or higher
n-Hexane	10ppm	Unclear demarcation	Pink when 10ppm or higher
Benzen	100ppm	No	White when 500ppm or higher
Methanol	2ppm	+	Pink when 5ppm or higher Pale blue when 9ppm or higher
Methyl Ethyl Ketone	2ppm	+	Pink when 3ppm or higher