These products can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP),
which is known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information go to www.P65Warnings.ca.gov

Click here for detailed image of the 750 II Resistivity



  • Affordable

  • Ease of Operation

  • Low Maintenance

  • Ensures Product Quality

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


Since Temperature Compensation is at the heart of accurate water measurement, all Myron L Monitor/controllers feature a highly refined and precise TC circuit. This feature perfectly matches the water temperature coefficient as it changes. All models are corrected to 25C. The TC may be disabled to conform with USP requirements.


Built-in electronic calibration allows for fast quality checks.


A push-to-test button makes setpoint checks easy, while the internal alarm set discourages unauthorized adjustments.


Standard on all controller models is a heavy-duty, 10-amp output relay, operating on either increasing or decreasing readings. Bright green/red LEDs indicate readings above or below setpoint.


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.


Additional options include a 3 Sensor Input Switch and/or a 3 Range Switch and a Remote Alarm model RA.




All 750 Series II Resistivity models require a CS10 series sensor. This reliable sensor features two integral thermistors to ensure accurate and rapid automatic temperature compensation. The sturdy polypropylene standard bushing is modular for easy, inexpensive replacement. A PVDF or 316 stainless steel bushing can also be ordered. The metal portion is available in either 316 stainless steel (standard) or titanium.


Note: Special Order, CS40 and CS41, High Temperature/High Pressure sensors available upon request.







Deionization (DI) and distillation ultrapure water treatment systems




Food Processing


Power Plants

Boiler Condensate

Process Control



7 Resistivity ranges from 0-200 Kilohms to 0-20 Megohms-cm

Choice of 3 digit display or analog meter

Automatic temperature compensation to 25C

Isolated 0-10 VDC Recorder Output standard

IP65/NEMA 4X water resistant and corrosion-proof enclosure

Built-in electronic calibration

Single set point/alarm standard

Adjustable setpoint hysteresis 

Solid State 24 VDC  Output

10 amp relay operates on 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



Options Include:

Second Alarm/Control Module

4-20 mA Isolated Output

Piezo Electric Alarm

3 Digit Backlit Display

Temperature Module

24 VAC Isolated Power Supply

24 VDC Isolated Power Supply















Constant: 0.05

Temperature Compensation:  Two integral temperature sensors provide automatic TC to 25C.

Pressure/Temp Limits:  100 psi/690 kPa @ 212F/100C.

Bushing: Modular Polypropylene threaded 3/4 NPT. 1/2 PVDF or 316 stainless steel fittings (optional).

Cable:  Shielded 10 ft./3 meters standard; 25 and 100 ft./ 8 and 30 meter lengths available.

Dimensions: Metal portion 30 L x 13 Dia. mm/ 1.2 L x .5 Dia. in.; overall length 91 mm/3.6 in.



Additional Information

750 Series II Data Sheet
(includes specs, options and order info)

click here: PDF

Price List click here: PDF
Sensor Price List click here: PDF
Replacement Parts click here: PDF
OEM Parts click here: PDF

750II Sensor Selection Guide 

click here: PDF

750II Range Selection Guide  click here: PDF
Resistivity Sensor # CS10 click here: PDF
Sanitec Fitting Sensor Option click here: PDF

Operation Manual

click here: PDF

Limited Warranty
All MyronL Monitor/controllers and sensors have a Two (2) Year Limited Warranty. If any Monitor/controller or sensor fails to function normally, return the unit to the factory prepaid. If, in the opinion of the factory, failure was due to materials or workmanship, repair or replacement will be made without charge.
A reasonable service charge will be made for diagnosis or repairs due to normal wear, abuse or tampering. Warranty is limited to the repair or replacement of Monitor/controller or sensor only. The MyronL Company assumes no other responsibility or liability.


                      Site last updated on: 30-Apr-2008 

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