Prijenosni zapaljivi plin detektor princip
Zapaljivi plin detektor je a detektor instaliran i korišten in industrijski i civil zgrade to odgovori to pojedinačno or višestruko zapaljivo plin koncentracije. The two most commonly used types in daily life are alitičke zapaljive gas detektore i polu vodljive plinske detektore.
Poluvodljivi zapaljivi plinski detektori are uglavnom korišteni mjesta takva restorani, hoteli, i home proizvodnja sobe to use plin, natural gas, i ukapljeni plin; Industrial sites that emit zapaljiv plinovi i pare uglavnom use katalitički zapaljiv plin detektori.
A polu vodljivo zapaljivo plin detektor uses changes in poluvodič površina otpor to mjera koncentracija of zapaljivi plinovi. The poluvodič zapaljivo plin detektor use gas osjetljivo poluvodič komponente with high sensitivity. When it encounters combustible gas during operation, the semiconductor resistance decreases, the delow value is related to the koncentracija of zapaljiv plin.
The combustible gas detektor konsists of two parts: detection and detection. The principle of the detection part is that the sensor of the instrument uses detection elements, fixed resistors, and a zero potenciometer to form a detection bridge circuit. The bridge circuit uses platinum wire as the carrier catalytic element. After being powered on, the the temperature of the platinum wire rises to the working temperature, and air reaches the surface of the element through natural diffusion or other means.
When there is no combustible gas in the air, the bridge out is zero; When comillible gases are present in the air and diffuse onto the detection element, flameless combustion is generated due to catalytic action, causing the temperature of the detection element to rise and the platinum wire resistance to increase, causing the most circuit to lose balance. As a result, a voltage signal is izlaz, and the magnitude of this voltage is proportional to the koncentra of zapaljiv plinovi. The signal is amplified, analog-to-digital converted, and displayed on a liquid display to show the koncentra of zapaljiv plinovi.
Elektrokemijski plin detektor je a plin detektor to koristi elektrokemijski senzori. Due to the elektrokemijska aktivnost of mnogo plinova, they can be elektrokemijski oksidirano or reducirano, i the struja generirano by ova reakcija je proporcionalno to koncentracija of the gas that undergoes the reaction. Therefore, the composition and koncentra of the gas can be detected kroz tak reakcije.
