2 in 1 industrial digital pH and ORP controller with electrodes

Product Code: PH-303
In Stock
Price: $114.90

This 2-in-1 pH / ORP controller is ideal for owners of freshwater planted aquarium as well as the serious saltwater hobbyist. . It simultaneously controls and measures the pH and Redox (ORP) values, showing the values of both indicators on a large LCD screen by switching a button.

In addition, 2 BNC (pH and ORP) probes and 1 control output socket are included, which simultaneously regulate and control and  the amount of CO2 (via pH value) and ozone (via the ORP level). You can also use these functions individually using the pH or Redox control only.

The included 220V or 110V or  relay power plug can be attached to any 110V or 220V device, such as an ozonizer, an oxygen pump, a CO2 regulator, an air outlet stone or an electromagnetic valve.


  • Simultaneously regulates and controls the ORP and pH level in liquids
  • Simultaneously displays both the pH and ORP (Oxidation / Reduction Potential) values on a large, readable LCD display
  • Equipped with 2 replaceable BNC probes (pH and ORP) plus 1 control output socket
  • Available with a power socket for ozone solenoids, CO2, or dosing pumps
  • Easy calibration of pH and TDS with only a mini screwdriver (detailed calibration procedure is described in the manual)
  • Quick and easy installation and operation
  • With an additional Protection Dead Band feature that automatically turns off the device to avoid erroneous reports
  • Meets the CE and RoHS safety and quality standards


Measuring range:

         pH: 0.00 ~ 14.00 pH

         ORP: -1999 ~ 1999mV


         pH: 0.01 pH

         ORP: 1mV


         pH: ± 0.1% + 0.02 pH

         ORP: ± 5mV

Set Range:

         pH: 3.50 ~ 10.50 pH

         ORP: 0 ~ 1000mV

  • Relay contact: 5A for alternating current 110V or 220V
  • Display: 4-digit LED display
  • Operating temperature: 0 ~ 50 ° C (32 ~ 122 ° F)
  • Humidity: 90 or less than 90% RH
  • Power: select 1 of the available adapters - 220 Volt AC power adapter (Europe, UK, Australia); 110 Volt AC Power Adapter (USA)
  • Power Requirements: AC110 Volt ± 10% 60Hz / AC220 Volt ± 10% 50Hz
  • Power consumption: 2 watts
  • Output voltage: the same as the supply voltage
  • Dimensions: Approx. 160 x 102 x 40 mm (6.30 x 4.02 x 1.57 inches)
  • Weight: approx. 800 grams

Set includes:

  • 1 x pH & ORP controller
  • 1 x set of free pH 4.003 and pH 6.864 solutions for calibration
  • 1 x replaceable 300 cm pH electrode
  • 1 x replaceable 300 cm ORP electrode
  • 2 x rubber holder for a self-adhesive cable - suction cap
  • 1x metal holder for mounting the appliance
  • 1 x mini screwdriver
  • 1 x Working instructions in English
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