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alarm B2B elderly monitoring home automation controller wholesale water leak detectors PIR kitchen sensor kitchen industrial level control float level switch non-contact level measurement 4G level sensor LoRa level sensor wireless telemetry level system multi-point level detection RoHS compliant level transmitter smart city level monitoring level alarm system cloud level platform fire protection solution factory park fire protection solution building fire protecti source factory home fire unattended cooking alarm fire safety R&D digital fire compliance platform fire d electromagnetic compatibility EMC battery charge time hours Latin America distributor smart home safety smoke pipeline pressure monitoring Clean Room Differential Pressure Monitor battery-powered pressure gauge industrial press high temperature level gauge submersible level transmitter water tank level control digital level display remote level measurement RS485 Modbus level gauge SIL2 certified level measurement FCC 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