Horiba D-75 Portable pH, ORP, Dissolved Oxygen Meter

In stock
The Horiba D-75 meter measures pH, ORP, dissolved oxygen, saturated oxygen and oxygen concentration with a wide range of electrodes to best suit the testing environment at hand. Waterproof and field ready.

Horiba D-75 Portable pH, ORP, Dissolved Oxygen Meter


This meter does not come with any electrodes, please choose the desired sensor from the appropriate category.

Features:D-75T 08-s


  • Economical meter for pH, ORP, dissolved oxygen, oxygen saturation, oxygen concentration, and temperature measurement
  • Choose from a wide selection of pH electrodes to fit specific testing situations (sold separately)
  • Measures oxidation reduction potential of samples at the same time with the 2 testing channels
  • Revolutionary waterproof meter and electrodes make testing in the field easy and care-free (Conforms to waterproof standard of IEC529:IP67)
  • Quick connection to a PC allows for easy and fast data evaluation and printing
  • Automatic data-logging function stores up to 1,000 sets of data automatically
  • Self diagnostic function ensures reliable monitoring of battery voltage, calibration, LCD checks and temperature testing
  • User-friendly operation and portability with a large Backlit LCD display

The Horiba D-75 meter allows the user to test the pH, ORP (oxidation reduction potential) and conductivity of samples of many different types. The wide range of pH electrodes allows the user to customize the measurement method to best fit their testing situation. This meter was designed to be used in the field or the lab as it is waterproof yet highly accurate. This versatility makes testing care-free and easy in all situations.


The Horiba D-75 meter can also test the dissolved oxygen content of samples- a factor in overall water quality. None of the dissolved oxygen electrodes are included with the meter and a full list of different Horiba dissolved oxygen electrode models can be found here.


Horiba Instruments Inc. is famous for the quality of its measurement devices and electrodes. The Horiba D-75 is interchangeable with any of the pH electrodes found in the Horiba pH electrode category. The full listing of pH electrodes can be found here.


The Horiba D-75 is also capable of measuring the oxidation reduction potential of aqueous solutions, and the optional ORP probe can be found here.


The Horiba D-70 series of field and lab meters all come with the ability to connect the meter to your PC for easy data collection and storage. You can also use the meter to connect to a printer output so you can print off your data and findings directly either in the lab or the field (except for the D-71).


The Horiba D-70 series meters are among the highest quality IP-67 rated waterproof meters and electrodes available. Used primarily for water analysis, it can easily be used to test a huge range of liquid samples such as soil samples, plant sap samples, liquid fertilizers, compost tea and even your fruit and vegetable juices.


The D-70 series comprises of the following meters, all of which are available from Agriculture Solutions LLC.


D-71 - Economical meter for pH and temperature.

D-72 - Multi-parameter meter for ph/temperature/ORP with PC/printer output capability.

D-73 - Multi-parameter meter for pH/temperature/ORP/ISE with PC/printer output capability.

D-74 - Multi-parameter meter for pH/temperature/ORP/conductivity with PC/printer output capability.

D-75 - Multi-parameter meter for pH/temperature/ORP/dissolved oxygen with PC/printer output capability.


All meters are of the highest quality. None of the D-70 series meters come with electrodes allowing you to choose exactly which electrodes you prefer and easily replace old or broken electrodes without replacing the top-of-the-line meter. For a full range of electrodes for this meter visit the D-70 series electrodes pages.


Optional: hard case, meter stand with arm, strap, AC Adapter and serial cable.




  • Display Range: 
    • pH: -2.00 to 16.00 (Flashing in the case of outside measurement range)
    • mV(ORP): -2000 to 2000 mV (Flashing in the case of outside measurement range)
    • Temperature: 0.0℃ to 100.0℃(-30℃ to 130℃) (Flashing in the case of outside measurement range)
    • Dissolved Oxygen: 0.00~20.00 mg/L
    • Saturated Oxygen: 0.0~200.0%
    • Oxygen Concentration: 0.0~50.0%
  • Resolution: 
    • pH: 0.01 pH
    • mV(ORP): 1 mV
    • Temperature: 0.1℃
    • Dissolved Oxygen: 0.01 mg/L
    • Saturated Oxygen: 0.1%
    • Oxygen Concentration: 0.1%
  • Repeatability: 
    • pH: ±0.01 pH±1digit
    • mV(ORP): ±1 mV±1digit
    • Temperature: ±0.1℃±1digit
    • Dissolved Oxygen: ±0.1 mg/L±1 digit
  • Operating ambient temperature/humidity: 0℃ to 45℃, 80% or less in relative humidity (no condensation)
  • Power: LR03/AAA alkaline batteries or AAA Ni-H rechargeable batteries × 2, AC adapter 100 V to 240 V 50/60 Hz (optional)
  • Current consumption: Less than 2 mA
  • Battery life (without screen backlighting): Approx. 500 hours
  • Dimensions: Approx. 67 (80) × 28 (42) × 170 mm (The figures in parentheses are maximum thicknesses.)
  • Weight (without batteries and electrode): Approx. 285 g

Unit Ship Weight: 4 lbs

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