What is Gastec Tube?
Gastec Colour Gas Detector Tubes Gastec Detector Tubes are used in environments where sampling, screening and TWA measurement is required. They are of the highest quality for accurately analysing a wide variety of gases, vapours and ground substances. A colorimetric stain (a colour change) is created.
What is colorimetric detector tubes?
Colorimetric detector tubes are graduated glass tubes filled with chemical reagents that produce a color change when exposed to the gas in question. They’re used with hand pumps that draw a sample of air into the tube. The tubes are sealed at both ends when they come out of the package.
What are the two most common types of detector tube devices?
Types of detector tube
- Short-term measurement detector tubes.
- Passive dositubes for time-weighted measurements.
- Detector tubes for Automatic air sampling pump.
- Airtec tubes.
- Polytec tubes.
- PYROTEC detector tubes.
- Injection type detector tubes.
- Detector tubes for dissolved substances in solution.
What are detector tubes?
A detector tube is a graduated glass tube filled with a chemical reagent that will produce a colour change when exposed to the gas in question. Tubes are generally supplied in packages of 10 and are sealed at either end.
How do you read a Gastec Tube Tube?
Tips for detector tube reading: When the end of the colour change layer is flat, simply read the value at the end. When the end of the colour change layer is slanted, read the value in the middle of the slant.
Why do detector tubes have different ranges?
What range do the detector tubes measure at? For many gases and vapours, there are several concentration ranges available (ppm, %, Mg/m3, mg/l) giving you the flexibility to measure both low and high concentrations without sacrificing precision.
What is a colorimetric tube used for?
Colorimetric tube technology has been used for many years to sample for specific gases in a specific area, such as a hazardous leak in an industrial setting. A chemical reagent changes colors to indicate the existence of hazardous vapors.
How much can the accuracy of a detector tube device vary?
Tubes are not very accurate. At best, expect ± 20%. More generally, expect ± 25%. Tubes can be quite temperature sensitive, and although correction data is customarily provided by the manufacturer, in practice it is not frequently applied.
What is gas detection tube?
With a gas detector tube, you can detect the presence of a specific gas in the atmosphere. Gas detector tubes can be used to detect flammable gases, toxic gases and oxygen. Many gas sampling pumps contain a tube tip cutter.
How do you read a detector tube?
Just insert the tubes into a hand pump, suck in air through the pump, and read the results to find out if the air is safe to breathe. Gas detection tubes are commonly used to take grab samples in a wide variety of applications, including potentially hazardous work environments.
What does a photoionization detector measure?
A PID uses an ultraviolet (UV) light source to break down VOCs in the air into positive and negative ions. The PID then detects or measures the charge of the ionized gas, with the charge being a function of the concentration of VOCs in the air.