Gastec Pump
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Break off the both ends of the detector tube by using the diamond built-in tip breaker.   Confirm the pump handle is fully pushed in.  Then insert the detector tube into the rubber inlet with arrow G ► mark towards the gas sampling pump. Align the guide marks on the pump shaft red (►) 100 or 50 ml, and pull out the handle until it is locked.  Wait until the sampling time has elapsed.  With an easy-to-see flow finish indicator (white disk pops out when the prescribed volume has been fully drawn), the operator is assured of fail-safe operation.
The color in the detector tube changes as the gas is drawn in.  Wait the required sampling time and read the measurement at the end of the color changed layer.  (Please note the concentration or mark the color changed demarcation on glass tube by a pen immediately).
The Gastec Standard Detector Tube System mainly consists of the Model GV-100S Gas Sampling Pump and Gastec Standard detector tubes.  Gastec standard detector tubes are provided in separate box.  All Gastec detector tubes are provided in boxes.  Each box contains 10 detector tubes of the same kind.  A box of twin tubes contains 5 Analyzer (Detector) tubes, 5 Primary (Pretreatment) tubes which a single rubber connector and provides five test.   Each box also contains the instruction sheet for the detector tube and ten numbered adhesive labels.  Each of the adhesive labels may be separated and put on the detector tube for taking notes of measurement.  Major information about the detector tube is printed on the label on the box. Model GV-100S Gas Sampling Pump Kit, its accessories (3 rubber inlets and lubricant), and the instruction sheet are provided in a carrying case.  Model GV-100LS is the larger shoulder bag which includes same accessories as 100S.  Durable leather shoulder bag GV-100LS for easy transport and hands free operation.  Moreover you can bring at least ten (10) boxes of gas detector tube, Model GV-100 Sampling Pump, model 350A 5-meter or 10-meter extension hose and Gastec Hand Book.  The Hand Book contains valuable information about environmental measurement using gas detector tubes.

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