Resistivity Monitor/Controllers 751-752-753-754 models

Guaranteed Accuracy and Reliability

Field Proven Electronics
The unique circuitry of the 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 corrected to 25°C. The TC may be disabled to conform with USP requirements.

Built-in electronic calibration allows for fast quality checks without standard solutions. (Note: for maximum system accuracy standard solutions are recommended). 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 above or below setpoint readings.

All 750 Series II models feature an IP65/ NEMA 4X water resistant and corrosion-proof rated enclosure. Compact in size at 152 x 122 mm/6 x 4.8 in., they 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.

Features

• Resistivity ranges: 0-200 Kilohms to 0-20 Megohms-cm
• Choice of 3 1/2 digit display or analog meter
• Automatic temperature compensation to 25°C
• 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 sensors

Benefits

• Affordable
• Ease of Operation
• Low Maintenance
• Ensures Product Quality

750 Series II Resistivity Sensor Specifications:

• Constant: 0.05
• Temperature Compensation: Two integral temperature sensors provide automatic TC to 25ºC.
• Pressure/Temp Limits: 100 psi/690 kPa @ 212ºF/100ºC.
• 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.

Resistivity Sensor — CS10
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.

Functional Specifications:

750 Series II Product Applications:

• Deionization (Dl) and distillation ultrapure water treatment systems
• Electronics
• Pharmaceuticals
• Laboratories
• Food Processing
• Plating
• Power Plants
• Boiler Condensate
• Process Control

RESISTIVITY SENSOR #CS10
For 750II Resistivity Monitor/controllers

• Small size enables convenient installation and service.
• Dual O-ring seals used on all versions for high on-stream reliability.
• Plastic gland fitting allows removal and replacement without tools.

MODELS: CS10 and CS10LS
BENEFITS

• Economic Value
• Small, Convenient Size
• 100 psi at 100°C
• General Purpose Use
• Field Replaceable

DESCRIPTION
Wetted materials of construction are 316 stainless steel and Teflon®**, with double O-ring seals at all points. The first EPR O-ring bears the brunt of process interface, allowing the second O-ring to maintain reliable sealing, free from chemical attack. An integral temperature element allows automatic compensation for maximum accuracy. Leads are 10 ft./3 meters standard.
Process connections are made via a bored through swage 3/4" NPT fitting as standard. This fitting may be installed into a line or tank, or may be reversed and connected to a standpipe for use in a submersion configuration.
The CS10 was designed primarily for use in pure water applications.

SPECIFICATIONS

Sensor Constant:

See 750II Sensor Selection Guide.

Limited Warranty
All Myron L® Monitor/controllers have a Two (2) Year Limited Warranty. pH Sensors have a Six (6) Month Limited Warranty. If any Monitor/controller 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 only. The Myron L® Company assumes no other responsibility or liability.

Resistivity Range Notes:
† Available in digital models only

Conductivity/TDS and Resistivity Accessories Notes:
* Does not fit into enclosure, must be mounted separately

** Teflon® is a registered trademark of DuPont.

Call or email for Special Order Sensor Options

• Models: 751II, 752II, 753II, 754II, -SC, -4A, -PA, -PAT, -35BL, -45BL, -TP, -TH, -PC, -24VA, -PTS, -SFP, -TPA, -HT, SCO, 4AO, 3SE, 3SO, 3RER, 3ROR, 3SRER, 3SROR, PAO, PATO, 35BLO, 45BLO, TPO, THO, TPC, PCO, SMP50, RA, VR, 024-1, CS-11, CS-14, CS-17, CSC, RC, RCATF, CS10, CS10LS, -T, -25, -100, -PV, -HPSS & -SQC