The BL981411 is a compact pH process controller built for applications where space and budget are limited. Designed to work with any pH electrode using a standard BNC connector, this controller features a high-impedance pH input and an adjustable dosing relay. With selectable automatic or manual dosing modes, it offers simple setup, ongoing maintenance, and efficient troubleshooting. Clear, easy-to-read LCD display Durable fire-retardant casing Standard BNC connection for compatibility with most pH electrodes Key Features: Adjustable Dosing Relay The built-in dosing relay can be programmed to activate when pH levels rise above or fall below a custom setpoint. This ensures precise control for your application. Overdose Protection To prevent overdosing, the controller includes a safety feature that deactivates connected devices (such as valves or pumps) if they operate continuously beyond a set time. This time limit is adjustable between 5 and 30 minutes. Manual Override Switch Easily override automatic control modes by flipping a switch to force devices into “Off” or “Always On” modes — perfect for maintenance or system checks. Fuse-Protected Dosing Output The dosing contacts are fuse protected to support devices drawing up to 2A, ensuring safe operation for connected pumps or valves. Quick Terminal Connections Easy-to-use quick-connect terminals simplify wiring for power, communication, dosing devices, and sensor inputs. Matching Pin for Ground Loop Protection An optional matching pin is included to protect the sensor from ground loop interference, helping prevent erratic readings or equipment damage.
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