Monitor and control process water using ORP sensors.


  • Automatic temperature compensation 0-100° C
  • Set points on front panel
  • Large bright red LED screen
  • Easy to install

ORP Controller Product Description

Global Water’s ORP Controller is a 1/8 DIN panel mount controller with dual SPDT Hi/Lo relays, manual set points and calibration potentiometers set into the front of the panel. The ORP controllers feature a voltage/recorder output and an internal ORP select switch. The ORP Controller’s display is a large 0.56 inch high efficiency bright red LED. The ORP Controller’s sensor connectors are a BNC input and spade lug screw type connector block. The ORP Controller requires a Pt-100 ATC probe or a simulation resistor for temperature.

The ORP controllers use an all solid state design to achieve low power consumption and reduced internal heating. Each ORP controller is heat cycled 100 hours before shipment. The ORP controller offers automatic pH temperature compensation from 0 to 100°C and set points that cover the entire ORP sensor span.

ORP Controller Specifications

ORP Controller Range:
pH:  0 to 14.0
Temp:  32.0 to 212.0 °F (0.0 to 100.0 °C)
mV:  -1990 to +1990
ORP Controller Resolution:
pH:  0.1
Temp:  1.8 °F (1 °C)
mV:  10
ORP Controller Accuracy:
pH (+ digit):  0.1 (relative) when standardized within 2 pH
Temp (+ digit):  1
mV (+ digit):  +0.1 %

Input Impedance:  >1012 ohms
Temperature Compensation:  Auto 32.0 to 212.0 °F (0.0 to 100.0 °C)
Recorder Output (Full Range):
pH:  1400 mV
Temp:  1000 mV
mV:  + 1990mV

Dual point ON/OFF control:  pH or ORP with internal select switch
Dead Band:  + 0.1 pH for each set point
Relay Output:  8 Amp at 115 VAC, 4 Amp at 230 VAC
Readout:  0 .56″ high efficiency red LED display
Power Source:  115 VAC, 230 VAC + 15% 50/60 Hz
Dimension:  3.75x2x6.75 inch (96x48x172mm)
Weight:  1.5 lbs (0.69 kg)

ORP Controller Options

3671 KB ORP Controller Kit (PN# HB0350)
Kit includes: ORP controller, 600P pH/Ref Electrode, and ATC probe.or ATC probe

3671 ORP Controller (PN# HB0300)


600P ORP Controller pH/Ref Electrode (PN# DO0010)
Industrial pH sensor: epoxy with BNC connector.  Comes with a 3 ft cable.  Max Temp. 60° C

3671A ATC phono plug (PN# HB0310)
Glass, Pt-100 with Phono Plug, 30 Inch Cable

600E-ORP Industrial ORP Transmitter Sensor (PN# DO0510)
Industrial ORP sensor: epoxy with BNC connector, Max Temp. 60° C, 3-ft cable.


3675 pH/ORP Controller (PN# HB0100)

6309POT pH/ORP Controller

PC320 Temperature Controller