Panel-mount type 2-channel electric resistivity meter (resistivity meter)

For control and monitoring treatment and production processes of pure water and ultra-pure water.

A high-grade resistivity meter that significantly improves critical temperature compensation performance for resistivity measurements of UPW (ultra-pure water) and high-temperature pure water, through adopting a newly designed temperature measurement circuit. Highly stable resistivity measurements are achieved through resistance to changes not only in water temperature, but also in ambient temperature.


Divisão: Process Water
Fabricante: HORIBA Advanced Techno Co., Ltd.

Enables measurements with minimal error

Measurements are affected less by ambient temperature and sample temperature, enabling accurate measurements with less error.

Highly responsive temperature sensor

Helps to minimize fluctuations in measurement values due to delayed temperature compensation in the event of sudden changes in water temperature.

We provide equipment and sensor calibration services

Temperature sensor offset calibration is offered as well as transmitter and sensor combination calibration services. *Option

2-channel specification

Allowing measurement at 2 points, and capable of displaying salt removal rate.

Product nameIndustrial 2-channel specific resistance meter
Electrode type (2-electrode method)
Sensor input2 channels (for concurrent measurement with sensors isolated each other)
Cell constant0.01/cm
Temperature sensor
Platinum resistance 1000 Ω/0℃
Measuring rangeMeasurement unitkΩ•m0 to 20.00 to 200.00 to 1000 *
MΩ•cm0 to 2.000 to 20.000 to 100.0 *
*: Measurable without temperature compensation
0℃ to 100℃
(The number of digits after the decimal point is selectable from one and two. The range of measurements is −20℃ to 120℃.)
Desalination rate0% to 100%
Temperature: 0℃ to 100℃ (Select your desired decimal point from 0, 1, and 2 digits.)
RepeatabilityWithin ±0.1% of the full scale (in equivalent input)
LinearityWithin ±0.5% of the full scale (in equivalent input)
Number of outputs: 2
4 mA to 20 mA DC/0 mA to 20 mA DC, input/output isolated type
Maximum load resistance: 900 Ω
Transmission output range: Freely selectable within the measurement range
(Negative terminals of each transmission output channel are connected inside and thus have the same electric potential.)
Contact outputNumber of outputs: 4
Alarm contact outputs (R1, R2, and R3)
  Contact type: relay contact, SPST (1a)
  Contact rating: 240 V AC, 3 A and 30 V DC, 3 A (resistance load)
  Contact function: selectable from the upper/lower limit action (ON/OFF control), delay, and hysteresis
  Selectable from the selected measurement, anomaly alarm, and maintenance.
Alarm contact output (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 the upper/lower limit action (ON/OFF control), delay, and hysteresis
  Selectable from the selected measurement, anomaly alarm, and maintenance.
  (However, R1 and R2, and R3 and R4 share the common contacts respectively.)
Calibration functionSpecific resistance: Based on the specified compensation coefficient for cell constant (parameter input)
Temperature: Calibrated by comparing with the reference thermometer
RS-485 input/output
output hold feature
  • Previous value hold
  • Optional value hold
    Selectable from the above (However, only the previous value hold is available in the maintenance mode.)
  • Sensor diagnosis
    Short-circuit and disconnection of the temperature sensor
  • Out of the measurement range
  • Converter error
  • Temperature compensation for extra-deionized water and impurities
      Select the temperature characteristics of impurities
      - NaCl temperature characteristics
      - Arbitrary temperature coefficient entry (temperature coefficient: 5%/℃)
      Reference temperature: 5℃ to 95℃
  • No temperature compensation is performed.
0℃ to 100℃
Extra deionized
water specific
resistance selection
kΩ•m182.3 (standard), 181.8, 182.4Select from options shown on the left.
MΩ•cm18.23 (standard), 18.18, 18.24
Clipping functionWhen the measured value is above the upper limit of the measurement range derived from the specified specific resistance, the specified resistance is used as the measured value.
−5℃ to 45℃
Relative humidity20% to 85% (without dew condensation)
−25℃ to 65℃
Power supplyRated voltage 100 V to 240 V AC, 50/60 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 Directives: EN61326-2-3
Low Voltage Directive: EN61010-1
RoHS Directive: EN50581
FCC RuleFCC Part15
96 (W) mm × 96 (H) mm × 115 (D) mm
Case depth: approx. 105 mm (when panel-mounted)
MassApprox. 550 g
Compatible sensorsERD/ERF-series specific resistance sensor, cell constant 0.01/cm

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