Overview
The Jenco 3671N pH/ORP controller is a compact, rugged 1/8 DIN panel-mount instrument designed for reliable pH or ORP monitoring and control in industrial automation and environmental applications. This model provides analog voltage output, 2 relays, and a red LED display with pt-100 ATC. The controller features dual SPDT Hi/Lo relays with manual set points and calibration via potentiometers. Its small footprint and straightforward design make it an economical choice for facilities requiring stable, accurate process control without complex software integration.
Key Features
- Voltage/recorder output and internal pH/ORP select switch for flexible output configuration
- Large bright red LED display for easy readout in control rooms
- BNC input and spade lug screw-type connector block for reliable field installation
- Pt-100 ATC or simulation resistor support for automatic temperature compensation
- Powered by 115/230 VAC with standard industrial power infrastructure
- Manual potentiometer-based calibration and setpoint adjustment—no software required
Technical Specifications
The 3671N offers a controller range of 0 to 14.0 pH or ±1990 mV ORP, with LED display resolution to 0.1 pH/10 mV and temperature indication to 1°C. The analog output is 10 mV per least significant digit, housed in a 1/8 DIN aluminum case.
Typical Applications
- Industrial water treatment and pH adjustment systems
- Wastewater treatment monitoring and control
- Swimming pool and spa automation
- Cooling tower water balance control
- Process water conditioning in manufacturing
- ORP monitoring for disinfection systems
Compatibility & Replacements
Compatible With
- Standard industrial pH electrodes with BNC connectors
- ORP sensors and probes
- Pt-100 RTD temperature sensors (ATC)
- 24 VDC recording devices via analog voltage output
- Analog data acquisition systems and SCADA
- Standard 1/8 DIN panel cutouts and enclosures
Replaces / Drop-In Replacement For
- Jenco 3671 (non-N version)
- Legacy analog voltage-output pH controllers in 1/8 DIN form factor
- Verify compatibility with your system integrator before ordering.
Works With
- Analog 4-20 mA and 0-10 VDC recorder inputs via voltage output
- Standard industrial relay logic and automation control systems
- pH and ORP sensors from Jenco and compatible manufacturers
- Manual process control without software dependencies
