HE-200R (Four-Wire Analyzer)


  • Accurate measurement of UPW resistivity
  • Well-examined temperature compensation function for UPW
  • Arbitrary setting of the compensation target temperature
  • Extensive interfaces (2-channel transmission output, RS-485 compatible, 3-relay output)

Hergestellt von HORIBA Advanced Techno


Measuring method

Two electrode method

Measuring range

Cell constant





0.000 to 2.000

0.00 to 20.00*


0.00 to 20.00

0.0 to 200.0*

* With conditions under which temperature compensation is not performed, it is possible to display 0.0 to 100.0 MΩ·cm (0 to 1,000 kΩ·m).



0 to 100   Resolution: 0.01˚C


Electrical resistivity: ±0.1% full-scale or less, Temperature: ±0.1˚C (for equivalent input)


Electrical resistivity: ±0.5% full-scale or less, Temperature: ±0.5˚C (for equivalent input)

Transmission output

Two points   4 to 20 mA DC   Input/output insulated type   Maximum load resistance 900 Ω

Contact output

Three points   Non-voltage contact output Relay contact, SPDT (1c)
 Contact function: R1, R2: Selectable from upper limit alarm, lower limit alarm, transmission output hold operation
  FAIL: Malfunction alarm
 Alarm operation: Output details: Electrical resistivity, temperature

Contact input

One point   Contact format: Open collector non-voltage a contact
 Contact function: Transmission output hold external input

Communication function

RS-485   Two wire system, Input/output insulated type (not insulated for transmission output)

Temperature compensation range

0 to 100˚C

Ambient temperature

-20 to 55˚C

Temperature compensation element

Pt 1000 (0˚C)

Calibration function

Electrical resistivity: Based on input of cell constant correction coefficient (parameter input)
Temperature: One point calibration compared with reference temperature gauge

Additional function

Ultra-pure water electrical resistivity selection function, clip function

Self-diagnosis function

Sensor diagnosis error, Analyzer malfunction

Power supply

90 to 264 V AC 50/60 Hz
Power consumption 15 W or less


Outdoor installation type: IP65 protection level
Mounting method: 50A pole or wall mounted
Case: Aluminum alloy
Mount fitting/hood: SUS304

Compatible sensor

ERF series electrical resistivity sensor (cell constant 0.01/cm)

Pair calibration accuracy*

Electrical resistivity: ±0.01 MΩ·cm or less (for standard unit / same temperature)
Temperature: ±0.02˚C or less (for standard unit / same temperature)


Approx. 4.5 kg

Equipment protected

CE marking, FCC rules

* The sensor and analyzer are assembled in advance and pair calibration is performed before shipping.

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