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Drager Short Term Detection Tubes - Tetrahydrothiophene 1/b (Pack of 5)

These tubes are designed for spot-measurements and must be used with the Drager Accuro Gas Detection Pump. Buy now from Frontline Safety.

£92.32 inc VAT

£76.93

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Product description

These Drager short-term detection tubes are for Tetrahydrothiophene (1/b) and come in a pack of 5 tubes. They have a shelf life of 2 years.

Buy the Drager Accuro Gas Detection Pump by clicking here . This is required for the use of short-term gas detection tube.

Hard-to-reach and on-the-spot measurements can be carried out using the tubes, pump and accessories
Obtain measurements within 10 seconds to 15 minutes (depending on the type of tube)
Pre-entry checks, confined space entry, variations in concentration levels in the workplace and contamination of breathing zones are possible applications which may use tubes

Specification

Application Range
Standard Measuring Range:	1 to 10 ppm / 4 to 40 mg/m3
Number of Strokes n:	30
Time for Measurement:	In air - approx. 15 min
	In natural gas - approx. 10 min
Standard Deviation:	± 15 to 20 %
Color Change:	violet --> yellow brown

Ambient Operating Conditions
Temperature:	0 to 35 °C
Absolute Humidity:	< 30 mg H2O / L

Reaction Principle
THT + KMnO4 --> yellow brown reaction product

Cross Sensitivity
Up to 10 ppm hydrogen sulfide is adsorbed in the pretube, causing a brown discoloration. It is impossible to measure tetrahydrothiophene in the presence of mercaptans. Up to 100 ppm of olefines (e. g. ethene, propene) will cause the color of the indicating layer to become lighter, at higher concentrations the olefins are also indicated. Up to 200 ppm methanol does not interfere.

Extension of the Measuring Range
1.6 to 16 ppm / 6.4 to 64 mg/m3 n = 20 multiply the reading by 1.6