Sealed pH/ORP controller/transmitter, manual calibration, mV zero adjust, 2-relays, tinned leads.

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1/4 DIN panel mount pH/ORP controller/transmitter in a waterproof IP65 enclosure. Features, LCD display, dual SPDT Hi/Lo relays, manual set point adjust and pH calibration via potentiometers. For ORP there is a Zero Adjustment and pH/ORP is selectable via a shorting plug. Output is 4 ~ 20 mA current type. Connectors are a spade lug circular connector for pH . All other connections are tinned leads to terminal blocks. Temperature compensation is a Pt-100 ATC or simulation resistor. Power 115/230 VAC.

  • Dual function pH & ORP
  • Orp zero point calibration
  • Isolated 4 ~ 20 mA output
  • Dual on/off relays
  • Auto temperature compensation
  • Water & corrosion proof case
  • Large LCD display


pH Range
0.00 to 14.00 pH
pH Resolution
0.01 pH
pH Accuracy
±0.03 pH
ORP Range
-1999 to 1999 mV
ORP Resolution
1 mV
ORP Accuracy
±0.1% F.S.
Relays Output (Max)
5 amp. at 115 VAC, 2.5 amp. at 230 VAC, resistive load
Relay Hysteresis pH/ORP
±0.1 pH / ±10 mV
Current output
Isolated 4~20 mA
Isolation Voltage
500 VDC max
Load Resistance
500 ohm max
Current Output pH/ORP
0.00~14.00 pH / 0~1400 mV
Input Impedance
>1013 ohms
Temperature Compensation
Auto 0 to 100 °C
Temperature Sensor
pH Zero Point Control
±2.0 pH
ORP Zero Point Control
±100 mV
12.7 mm high LCD
115 VAC, 230 VAC ±15%, 50/60 Hz
910 g
96mm (l) x 96mm (w) x 171mm (d)
Cutout size
92 x 92 mm

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