solenoid shut-off

Heat Detector Testing Device — Wanlin, a Chinese fire protection products and application equipment manufacturer and exporter based in Shenzhen, China, supplies the A119-YW line across photoelectric smoke detectors, A1R / A2S heat detectors, resettable and weatherproof manual call points, EN 54-3 and EN 54-23 sounder strobes, the 860 addressable fire alarm ···