This uses an injector tube to sample gas samples, which is inserted into a detector tube to perform measurements. Detector tubes used for high concentration carbon dioxide and propane gases apply this feed-in method.

Tubes are supplied in packs for 10 tests.

Click on the part number to view the specific datasheet.

The prime importance in the case of emergency response to chemical spills, or investigation after a fire, is to quickly determine any gases present and their concentrations. With the Gastec Toxic Gas Detection System this can be accomplished quickly, easily and accurately on the site, using 12 types of Gastec Detector Tubes and the Gas Sampling Pump. As the substances to be measured could be hazardous, adequate precautions should be taken to ensure safety.

• Fast and easy determination of pollutants
• Portable - no power supply required
• Minimal training required - follow the simple flowchart
• Cost effective
• Minimal maintenance compared to electronic detection systems

The Gastec 810-CG-1 system can simply, quickly, and simultaneously measure four kinds of harmful contaminants (CO, CO₂, Water vapour, and Oil mist) contained in compressed breathing air (cylinder or compressor).

• Fast and easy determination of breathing air quality - simply connect the measuring device to a cylinder or compressor
• Portable - no power supply required

Gastec Colour Dosimeter Tubes (Dosi-tubes) provide reliable, on-the-spot Time-Weighted Average (TWA) monitoring of worker exposure to gases and vapours. The system is simple-to-use and easy-to-read, with no need for a pump, chart, or laboratory analysis. The Dosi-tube system allows an operator to evaluate the level of exposure over a long time period such as a working shift.

The system consists of Gastec Dosi-tubes and a tube holder (part number 810-710). The pre-scored ends of the tube are simply snapped off and the tube inserted into a tube holder. Air diffuses passively through the tube and reacts with the detecting reagent within, giving a colour change result that is indicated on the printed scale. The tube holder can either be attached in a worker’s breathing zone or installed in work areas to act as an area monitor.

Using a simple equation, the Dosi-tube system produces an average concentration of exposure over a set period of time – commonly known as a Time Weighted Average (TWA). To calculate the ppm level simply read the printed calibrated scale on the tube for exposure measurement in parts-per-million-hours (ppm-hours), and divide the reading by the number of hours sampled.

Note: When measuring carbon dioxide, mount the tube holder on the worker’s waist rather than in their breathing zone. This will avoid overstating CO₂ levels due to exhalation.