The Hach sc200 is the successor to both the sc100 digital controller and the GLI53 analog controller, unifying digital and analog sensor support in a single platform. Compatible with over 30 Hach sensor series covering 17+ water quality parameters — pH/ORP, dissolved oxygen, free and total chlorine, conductivity, turbidity, flow, sludge level, nitrate, ammonia, and more — the sc200 is deployed across municipal drinking water plants, wastewater treatment facilities, and industrial process water systems.

Why combine digital and analog sensor inputs in one controller?

The dual-input architecture allows a single sc200 to monitor two parameters simultaneously — two digital sensors, two analog sensors, or one of each — eliminating the need for separate controllers per measurement point. This is particularly valuable at remote monitoring stations and compact analyzer panels where space and cost per measurement loop matter. All sensor inputs are auto-recognized: plug in a digital sensor and the controller identifies the parameter, model, and serial number without manual configuration.

What communication and integration options are available?

Two 0/4–20 mA analog outputs with HART protocol come standard, each configurable for linear, logarithmic, bilinear, or PID control modes. Four SPDT relays (5 A/250 VAC) support alarm, timer, dosing, PWM, frequency, and event-based control functions. For plant-wide SCADA or PLC integration, optional plug-in modules add Modbus RS232, Modbus RS485 RTU, or Profibus DPV1 communication. An SD card slot on the front panel stores data logs and enables rapid configuration cloning — set up one sc200, copy the SD card, and replicate settings across every controller in the plant.

How does the sc200 handle field conditions?

The IP66/NEMA 4X-rated enclosure is available in polycarbonate, powder-coated aluminum, or 304 stainless steel, accommodating wall, pole, and panel mounting. The graphical dot-matrix LCD (240 × 160 pixels) with LED backlight remains readable in direct sunlight and dim control rooms alike, and the 30-language menu system reduces training time for multinational operating teams. Operating temperature spans −20 to +60 °C with 0–95% relative humidity non-condensing, making the sc200 suitable for outdoor installations without supplemental climate control.