Industrial ORP meter HO-480

Industrial ORP meter HO-480

The HO-480 industrial ORP meter is an ORP converter for measuring the oxidation-reduction potential of all types of solvent.
Being combined with a lead-free sensor, it makes measurements in a way that is kind to the environment.


Segment: Process And Environment
Division: Process Water
Base product
Manufacturing Company: HORIBA Advanced Techno Co. Ltd.


  • Includes a sensitivity correction function
    It is possible to compensate for changes in the sensitivity of the ORP electrodes.
  • A line-up of lead-free ORP electrodes
    Not only the glass body, but almost all sections of the ORP electrodes, including lead wires and soldered junctions are lead free.
  • Uses lead-free solder
    To reduce the burden on the environment, lead-free solder has been used to mount the components on the printed circuit board.



Product nameIndustrial ORP meter
Measuring range±2000 mV: resolution of 1 mV
Transmission output4 mA to 20 mA DC, input / output isolated type
Maximum load resistance 900 Ω
Transmission output range: freely selectable within the measurement range
RepeatabilityWithin ±5 mV of the full scale (by equivalent input)
LinearityWithin ±5 mV of the full scale (by equivalent input)
Contact outputOutputs: 2 points
Alarm contact output (R1 and R2)
Contact type: relay contact, SPDT (1c)
Contact rating: 240 V AC, 3 A and 30 V DC, 3 A (resistance load)
Contact function: selectable from upper / lower limit operation (ON / OFF control), alarm, and maintenance.
Calibration functionSensitivity compensation
Adjust: ±200 mV
Span variable range: 50.0 % to 150.0 %
Transmission output
hold function
·Previous value hold
·Optional value hold
Selectable from the above (However, only the previous value hold is available in the maintenance mode.)
Self-diagnosis function·Outside of the measuring range
·Converter error
Power supplyRated voltage 100 V AC to 240 V AC, 50/60 Hz, 10 VA (max)
StructureIndoor-use panel installation type
Panel: IP65 dust and water proof structure
Protective structurePanel: IP65 (IEC60529, JIS C0920)
Conforming standardsCE Marking
FCC Rule
External dimensions48 (W) mm x 96 (H) mm x 115 (D) mm
Case depth: approx. 105 mm
MassApprox. 400 g


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