are intended for signalling of exceeding the set values of pre-explosion hazardous concentrations of methane (propane) or mass concentration of carbon monoxide at the level of maximum permissible concentrations in air, as well as, depending on the modification, issuing a signal to switch on the output relay, or a signal to close the shut-off gas valve.
أخبرنا بما تحتاجه واحصل على عروض أسعار من موردين موثوقين