Gastec® Tube and Pump System

distributed by Nextteq® International LLC

Nextteq® International LLC is also a Master Distributor for Gastec detector tubes and pump.  Nextteq continues to supply custom inventory management and technical support for Nextteq Distributors who carry this product.


The Gastec detector tube and pump system consists of the model GV-100/GV-110 gas sampling pump and Gastec standard detector tubes. Several hundred types of detector tubes are available to support different gas/vapor types or concentration ranges.


Gastec warning: DO NOT INTERCHANGE WITH ANY OTHER PUMP AND TUBE SYSTEM: 

  • Interchangeability refers to using a pump from one manufacturer and a tube from another manufacturer.
  • The ANSI/ISEA specification #102-1990 (R1998) “Performance Standard for Detector Tube Units Used to Monitor Gases and Vapors in Working Areas” is designed to ensure that gas detector tube systems are not interchangeable. (Example: different regulator threads for gas cylinders containing different gases). 
  • Interchanging parts and components of different manufacturer’s systems reduces system accuracy and reliability and may also cause system failures.

Configurations Available

Gastec GV-100 gas sampling pump kit.

Pump Features

The Gastec® GV-100 Pump showing the Built-in Tube Tip Breaker to collect broken glass tips.

Built-in Tube Tip Breaker to collect broken glass tips


The Gastec® GV-100 Pump showing the small diameter handle for two-finger pull.

Small diameter handle for two-finger pull


The Gastec® GV-100 Pump showing that the body has soft elastomer handle for easy grip.

Pump body has soft elastomer handle for easy grip


The Gastec® GV-100 Pump showing how the white flow finish indicator in the handle helps identify when the sampling is finished.

White flow finish indicator in handle helps identify when the sampling is finished

Video Instructions

Operating Procedures

The Gastec® GV-100 Pump operating procedure : 1. Break off both ends of the detector tube. Insert the tube into the rubber inlet.

1. Break off both ends of the detector tube. Insert the tube into the rubber inlet.

The Gastec® GV-100 Pump operating procedure : 2. Pull out the handle until it is locked. Wait until the sampling time has elapsed.

2. Pull out the handle until it is locked. Wait until the sampling time has elapsed.

The Gastec® GV-100 Pump operating procedure : 3. Read the measurement at the end of the coloured layer.

3. Read the measurement at the end of the coloured layer.

Airtightness Test

If the sampling pump is not airtight, measurements will not yield correct results. Before starting to measure, be sure to verify that the sampling pump is really airtight.

The Gastec® GV-100 Pump airtightness test : 1. First, confirm that the inlet nut is not loose.

1. First, confirm that the inlet nut is not loose.

The Gastec® GV-100 Pump airtightness test : 2. Insert a detector tube (with both tips intact) into the rubber tube inlet of the sampling pump.

2. Insert a detector tube (with both tips intact) into the rubber tube inlet of the sampling pump.

The Gastec® GV-100 Pump airtightness test : 3. With the handle fully pushed in, align both of the guide marks (red line + triangle) on the pump (tail-end block) and the handle (▲100).

3. With the handle fully pushed in, align both of the guide marks (red line + triangle) on the pump (tail-end block) and the handle (â–²100).

The Gastec® GV-100 Pump airtightness test : 4. Pull out the handle in one thrust until it is locked, and then release the handle. Wait until the sampling time (approx. 1 minute) has elapsed.

4. Pull out the handle in one thrust until it is locked, and then release the handle. Wait until the sampling time (approx. 1 minute) has elapsed.

The Gastec® GV-100 Pump airtightness test : 5. Grasp the handle and turn it 90 degrees. If the pump is completely airtight, the handle should readily return to its original position; with the handle's demarcation read line fully concealed.

5. Grasp the handle and turn it 90 degrees. If the pump is completely airtight, the handle should readily return to its original position; with the handle's demarcation read line fully concealed.


Note:

When you return the piston, please ease it back gradually (lightly holding on to it so it does not snap back in one thrust. Since there is a vacuum inside the cylinder, the handle tends to return rapidly). If it snaps back too hard, the impact can damage the pump causing it to malfunction.


Gastec standard detector tubes are thin glass tubes with printed calibration scales by which you can directly read concentrations of the substances to be measured or take the reading and perform calculations to get the correct reading. 

A stack of Gastec standard detector tubes.