The unique circuitry of our 750 Series II Resistivity Monitor/controllers guarantees accurate and reliable measurements. Drift-free performance is assured by “field has proven” electronics, including automatic DC, offset compensation and highly accurate drive voltage.

Digital and Analog 750 Series II models have an IP65/NEMA 4X water-resistant & corrosion-proof rated enclosure. At 152 x 122 mm/6 x 4.8 in., all models are suitable for panel, bench or surface mounting.

Technical Brochure




  • 7 Resistivity ranges from 0-200 Kilohms to 0-20 Megohms-cm
  • Choice of 3½ digit display or analog meter
  • Automatic temperature compensation to 25°C
  • Isolated 0-10 VDC Recorder Output standard
  • IP65/NEMA 4X water-resistant and a corrosion-proof enclosure
  • Built-in electronic calibration
  • Single setpoint/alarm standard
  • Adjustable setpoint hysteresis
  • Solid State 24 VDC Output
  • 10 amp relay operates on the choice of increasing or decreasing reading
  • LEDs show “above/below” alarm/control status
  • Push-to-test set point check
  • Internal set point discourages unauthorized adjustment
  • Selectable 115/230 VAC
  • Reliable, easily installed sensor
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