How to Select Portable Gas Detectors
When selecting a portable gas detector, users often struggle to choose between diffusion type and pump-suction type. In fact, diffusion and pump suction are only two working modes of gas detectors. The relevant introduction is provided below.
Diffusion gas detectors are designed for open spaces, measuring the gas concentration surrounding the instrument. They serve as personal protective equipment for operators. However, pump-suction gas detectors are required for areas inaccessible to personnel.
Typical scenarios include the interior of pipelines, sewers, tanks, cargo holds and grain silos. Portable pump-suction gas detectors are available with external pumps or built-in pumps. A gas detector equipped with an external pump works as a diffusion detector when the pump is uninstalled; users can attach the pump as needed. Multi-gas detectors and compound gas detectors support optional external pump installation.
The sampling distance of an external pump can reach 20 meters. For detectors with built-in pumps (such as model X-AM7000) available in both diffusion and pump-suction versions, the sampling distance can be up to 45 meters. Therefore, users shall select the device according to actual application environments.
These detectors are widely used in chemical engineering, mining, iron and steel, petroleum, pipeline inspection, pharmaceutical manufacturing, decoration, fuel processing, food production, laboratories, gas leakage inspection and other industries. Pump-suction gas detectors are developed for special working conditions. Suitable for sites with explosion risks and toxic gas leakage such as underground pipelines and mines, they can fully protect personnel safety and production equipment.
Jet self-priming pumps are produced in multiple series with different motor power, suction head, delivery head and flow rate, resulting in different prices. In addition, pumps with copper wire windings and aluminium wire windings differ in cost.
