What is a Gas Detector tube and how to use it?
With gas detection tubes, you can detect the presence of specific gases in the atmosphere. Gas detection tubes can be used to detect flammable gases, toxic gases and oxygen. Detection tubes consist of sealed glass tubes containing reactive chemicals coated on inert carrier particles. Many gas sampling pumps include a tubing cutter. A tube tip cutter is provided on the gas sampling pump to cut off the ends of the Gas Detector tube before inserting the sampling tube into the gas sampling pump.
What is a gas detection tube?
With gas detection tubes, you can detect the presence of specific gases in the atmosphere. Gas Detector tubes can be used to identify flammable gases, toxic gases and oxygen. Detection tubes consist of sealed glass tubes containing reactive chemicals coated on inert carrier particles. These tubes can be stored unopened for several years. When turned on, a hand pump is used to draw a sample of air through the tube, which changes color by reacting with target compounds in the air. A colored stain travels the length of the tube and the gas concentration is measured through the final length of the stain using a pre-calibrated scale printed on the tube.
What are the advantages and disadvantages of gas detection tubes?
One of the advantages of gas detection tubes is that they can detect many specific gases that sometimes cannot be detected by other devices. Devices such as Gas Detectors with PID sensors or electrochemical sensors. Another advantage of Gas Detector tubes over Gas Detectors is the low-cost measurement without calibration. The disadvantage of Gas Detector tubes is that measurements using Gas Detector tubes are slower and less accurate than measurements made with Gas Detectors with PID sensors or electrochemical sensors.
What are the components of a gas detection tube for a gas detection system?
The gas detection system consists of two parts:
1. A box with gas detection tubes for specific gases, usually in packs of 10,
2. Gas sampling pump. The gas sampling pump is a piston barrel pump that can draw up to 100ml of sample and maintain a constant vacuum. To make the measurement, a gas detection tube open at both ends is inserted into the rubber tube connector at the end of the barrel. When the plunger is withdrawn by pulling the handle, the sample gas is slowly (1-3 minutes) drawn out of the tube and into the barrel. How many milliliters or how many pump strokes are required to make a measurement with a specific gas detection tube is indicated on the box of the gas detection tube and in the tube instructions.
How do I insert the gas detection tube into the gas sampling pump?
Many gas sampling pumps include a tubing cutter. A tube tip cutter is provided on the gas sampling pump to cut off the ends of the Gas Detector tube before inserting the sampling tube into the gas sampling pump. To break off the tip, insert it into the hole of the cutter and bend the tube to one side. Insert the open tube into the rubber inlet connector on the gas sampling pump. Make sure the arrow on the gas detection tube points to the gas sampling pump. Twisting the gas detection tube slightly when inserting will help ensure a good seal. For double tubes, first connect the pre-tube with the measuring tube, and then insert the measuring tube into the inlet of the gas sampling pump.
How to read the gas detection tube?
Using the scale printed on the test tube, read the concentration of the test compound directly from the length of the stain.
Read the gas detection tube immediately (within a few minutes) after sampling, as stains may fade or spread over time.
What is a thick tube and what is a thin tube?
The thick tube is a Dräger or MSA/KWIK-DRAW brand gas detection tube. The two brands of gas detection tubes are interchangeable and can be used with each other's gas sampling pumps. The thin tubes are UNIPHOS, GASTEC, KITAGAWA, RAE, HONEYWELL and SENSIDYNE brand gas detection tubes. These brands of gas detection tubes are also interchangeable and can be used with each other's gas sampling pumps. However, the brand of thick tubes and the brand of thin tubes are not interchangeable due to their different sizes, so they cannot be installed in each other's gas sampling pumps.
How to store gas detection tubes?
You need to store Gas Detector tubes in a cool, dry, and dark place (such as the refrigerator). Tubes stored at room temperature will be used within the shelf life stated on the tube insert. It is recommended to store in the refrigerator at 4-7 degrees Celsius. There is no need to store the tubes below freezing, which can damage them in some cases.
