Panel-mount type pH meter with 4-point alarm time sharing proportional control

A compact water quality meter that offers a wide range of features and functionality.

A pH meter that supports time-proportional control. Suitable for pH monitoring and control in various production processes, as well as wastewater treatment and other applications. We offer a wide range of cleaning devices to accommodate a variety of samples.

Division: Process Water
Manufacturing Company: HORIBA Advanced Techno Co., Ltd.

Lineup of a wide range of electrodes

A wide variety of electrodes are offered to match the sample characteristics. The dome-shaped electrode with minimal irregularities provides confidence in its workability and strength when dealing with dirt. Additionally, by having two junctions, clogging can be better avoided, and stable measurement values can be expected (sleeve-type electrodes which allow easy release of inner liquids are also available).

Comprehensive range of cleaning devices

A diverse lineup of cleaning devices is offered. The ultrasonic cleaner can be retrofitted to HP-960FTP sites that are not equipped with a cleaner.

Product nameIndustrial pH meter
Measuring range0 pH to 14 pH: 0.01 pH resolution.
Temperature 0℃ to 100℃: 1℃ resolution (selectable display).
RepeatabilityWithin±0.05 pH (Equivalent input)
linearityWithin±0.05 pH (Equivalent input)

4 mA to 20 mA DC, input/output isolated type
Maximum load resistance: 900 Ω
Transmission output range: Free

Contact outputOutputs: 4 points
Alarm contact output (R1, R2, R3, and R4)
  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.
Contact inputInput: 1 point
Contact type: open collector, No-voltage contact
Contact function: external input for Hold operation
Control operations

ON/OFF control

  • Upper and lower limits setting range: 0.00 pH to 14.00 pH
  • Control width: 0.00 pH to 4.00 pH (±0.00 pH to ±2.00 pH)
    Time-division proportional control
  • Upper and lower limits setting range: 0.00 pH to 14.00 pH
  • Proportional band: 0.00 pH to 4.00 pH
  • Cycle time: 5 s to 300 s
  • Control output shift capability: 0% to 50% of shift volume for the cycle time
  • Self-extending cycle time capability: The cycle time is extended automatically when the deviation value enters a set range (F zone) in proportion to the deviation value (This feature has no effect when the shift function has been enabled).
  • F zone: 1% to 100% of the proportional band (Self-extension of the cycle time starts working when the deviation enters the above range).
  • Upper limit for extending the cycle time: 0 s to 300 s.
  • Maximum control volume: 50% to 100% (To be applied regardless of whether the measured value is in the proportional band or not).
Calibration functionTwo-point automatic calibration or manual calibration.
Two-point automatic calibration: with automatic validation of the electrode characteristics.
  Types of standard solution: pH 2, pH 4, pH 7, pH 9 and pH 10 (JIS)
  Combination of standard solutions: pH 7 and one of the others
  Manual calibration: Freely selectable, but the difference should be over 2 pH.
Temperature calibration (one point).
output hold feature
Selectable from the previous value hold, the preset hold, or the continuous output (However, only the previous value hold is available in the maintenance mode.)

Calibration function: Asymmetry potential error, sensitivity error, response speed error and standard solution error.
Electrode self-diagnosis: Temperature sensor short-circuit and temperature sensor disconnection.
Outside of the measuring range.
Converter error.


Selectable from compensation ON (350Ω (25℃), 500Ω (25℃),1 kΩ (0℃)6.8 kΩ (25℃) and 10 kΩ (25℃)) and compensation OFF.

0℃ to 100℃
−5℃ to 45℃
Relative humidity20% to 85% (without dew condensation)
−25℃ to 65℃
Power supplyRated voltage 100 V to 240 V AC, 50 Hz/60 Hz, 10 VA (max.)
StructureIndoor-use panel installation type
   Panel case: ABS, Terminal: PBT
Panel: IP65 dust and water proof structure
Protective structurePanel: IP65 (IEC60529, JIS C0920)
Rear case: IP20, Terminal: IP00
Class II device (IEC61010-1)
Pollution level 2 (IEC61010-1)
CE MarkingEMC Directive: EN61326-1
Low Voltage Directive: EN61010-1
RoHS Directive: EN50581
(Industrial electromagnetic environment)
Noise increase ±0.05 pH or less
FCC RuleFCC Part15
96 (W)  × 96 (H)  × 115 (D) mm
Case depth: approx. 105 mm
MassApprox. 550 g

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