designed for signalling of exceeding the set values of pre-explosive concentrations of methane or mass concentration of carbon monoxide at the level of maximum permissible concentrations in the 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