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IP66 High/Low Alarm Online pH ORP Meter for Pure Water Controller. IP66 Waterproof Rating: Designed for harsh environments with IP66 protection against dust and water. Dual Channel Alarm: Features 2 relay channels with AC250V/3A capacity for precise control. Customizable Power Supply: Supports AC 220V or 110V, 50Hz, with customizable options available. RS485 Communication: Equipped with standard Modbus protocol for easy system integration. 24/7 After-Sales Support: Provides round-the-clock technical assistance and service. ISO & CE Certified: Products meet international quality standards with ISO and CE certification. OEM/ODM Services: Offers custom design and manufacturing services based on client requirements.