gas leak alarm household catering gas liquefied natural gas new national standard certification automatic gas cut-off self-closing valve

gas/liquefied gas (dedicated for gas tank) has been packaged for fire protection

over fire alarm + shut-off valve (universal for medium, high and low voltage) high quality new national standard alarm + cylinder manipulator fire methane alarm + natural gas pipeline manipulator over fire alarm + electromagnetic through way valve alarm + low voltage solenoid valve (special for low voltage gas tank) digital display alarm + cylinder manipulator [4g remote notification] over fire alarm + shut-off valve fire protection wireless alarm + wireless shut-off valve 4g signal telephone notification alarm (two lines can be linked) separate alarm (non-linkage)