ORP pH controller FLS M9.46

Overview
The FLS M9.36 and FLS M9.46 are industrial pH/ORP controllers designed for precise, reliable measurement and continuous process monitoring. Both models feature automatic buffer recognition during calibration and in-line adjustment for accurate readings in varying operating conditions. They include a large 4” graphical transflective display with high‑brightness backlighting for clear visibility and a 4–20 mA analog output for integration with remote control systems. The FLS M9.46 adds Modbus RTU communication and a digital SSR output for fast, reliable minimum/maximum alarm activation, while the FLS M9.36 offers a streamlined configuration without Modbus and SSR output.

Main advantages of Modbus RTU

• Reduction of wiring and installation costs
• High compatibility with international standards
• Reliable signal transmission in harsh environments
• Remote configuration and monitoring capability
• Simple and cost‑effective scalability

Applications

• Water treatment and regeneration
• Industrial wastewater recovery and treatment
• Scrubber control
• Neutralisation systems
• Heavy metal recovery
• Metal surface coating processes
• Processing and manufacturing industries
• Chemical production
• Swimming pools and spas

Main features

• Calibration with automatic buffer recognition and in-line adjustment
• Compatible with most common pH/ORP electrodes and temperature sensors
• Transflective 4” graphical display with high‑brightness backlighting
• pH input range: –2 to 16 pH; resolution ±0.01 pH
• ORP input range: –2000 to 2000 mV; resolution ±1 mV
• Supply voltage: 12–24 VDC ±10% regulated
• Maximum electrical consumption: <300 mA

Characteristics / Technical specifications

• Models: FLS M9.36 and FLS M9.46
• Display: 4” graphical transflective display with high‑brightness backlighting
• Analog output: 4–20 mA
• Digital SSR output: available on M9.46 (alarm activation)
• Communication: Modbus RTU on M9.46
• Calibration: automatic buffer recognition and in‑line adjustment
• Electrode compatibility: compatible with FLS pH/ORP electrodes (bulb and flat) and standard temperature sensors
• pH measurement range: –2 to 16 pH; resolution ±0.01 pH
• ORP measurement range: –2000 to 2000 mV; resolution ±1 mV
• Supply voltage: 12–24 VDC ±10% regulated
• Maximum electrical consumption: <300 mA