How Gastec Gas Sampling Pump and Detector Tubes Works
Introduction to Gastec Detector Tube System
In this section, Paul Crows introduces the Gastec detector tube system and highlights its usefulness in measuring gases that are difficult to measure with other instruments. He also mentions the simplicity and safety of the system.
The Gastec Detector Tube System
- The Gastec detector tube system offers over 500 different tubes for measuring various gases.
- These tubes are intrinsically safe, pre-calibrated, and inexpensive to use.
- They are particularly useful in environmental and industrial environments.
- The system consists of a gas tech pump, a maintenance kit, and an instruction manual.
Components of the Gas Tech Pump
In this section, Paul Crows explains the different parts of the gas tech pump used in the Gastec detector tube system.
Gas Tech Pump Components
- The gas tech pump has several parts including:
- Sampling tip for inserting tubes
- Rubber flanges (replacement included in maintenance kit)
- Tip breaker for snapping off tube ends
- Tube counter or stroke counter
- Handle with marks for different sample sizes (100 cc and 50 cc)
- Flow finish indicator to indicate sample completion
Leak Check Procedure
In this section, Paul Crows demonstrates how to perform a leak check before using detector tubes.
Leak Check Procedure
- Insert an unbroken tube into the front end of the pump.
- Reset the stroke counter and set it to 100 cc mark.
- Draw out until it comes to a full click stop.
- Wait for one minute.
- Firmly grab the handle and body of the pump, give it a quarter turn.
- If the handle returns to its original position, there are no leaks.
- If there are leaks, replace the flange or lubricate the pump cylinder.
Tube Boxes and Instructions
In this section, Paul Crows discusses the tube boxes and the instructions provided with them.
Tube Boxes and Instructions
- Each tube box contains 10 tubes for 10 tests.
- The front of the box indicates the range of tubes and storage instructions.
- Tubes are pre-calibrated for use only with the Gastec pump.
- The top of the box displays the valid until date.
- Inside each box, there is a card for writing notes and instructions for using specific detector tubes.
Extended Ranges and Tube Usage
In this section, Paul Crows explains how extended ranges can be achieved with certain detector tubes by adjusting pump strokes.
Extended Ranges and Tube Usage
- Some detector tubes allow for extended ranges by adjusting pump strokes.
- For example, carbon dioxide uses one pump stroke while chlorine uses half or two pump strokes to modify the range.
- Pump strokes determine the concentration measurement range of specific gases.
Conclusion
This section concludes Paul Crows' demonstration on how to use the Gastec detector tube system. He briefly mentions scoring and snapping off tube ends as part of using the system.
Conclusion
- To use the system, select a tube, insert it into the tip breaker, score one end, snap it off, and repeat for the other end.
Timestamps have been associated with relevant bullet points in accordance with your request.
Using the Detector Tube
In this section, the speaker explains how to use the detector tube to measure carbon dioxide concentration.
Using the Detector Tube
- Line up the 100 cc mark with the red arrow on the tube.
- Draw a sample that takes approximately one minute to complete.
- The tube is initially white in color, but as carbon dioxide comes in contact with the reagent, it turns light purple.
- Wait for the flow finish indicator at the back of the tube to indicate that the pump stroke is completed.
- After one minute, take a reading off the detector tube and record it on a small card or sheet of paper for a permanent record.
Reading and Recording Concentration
- Once the pump stroke is completed, remove it from the tube holder.
- The gastec tube shows a concentration of about 1000 parts per million (ppm) of carbon dioxide.
- This reading indicates that there is currently 1000 ppm of carbon dioxide present.
That concludes how to use the detector tube to measure carbon dioxide concentration.