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Myron L Water Quality Monitors and RO System Controllers The unique circuitry of our 750 Series II Conductivity, TDS and 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 25°C. The TC may be disabled to conform with USP requirements.

Benefits of Myron L Water Quality Monitor System Controllers

Ensures Water Quality
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.
Affordable
Ease of Operation
Low Maintenance

Myron L 750 Series Resistivity Monitors/Controllers

Model No.	Monitors	Range	Display	Function
751II-11	Resistivity	0-20 Megohm	Analog Meter	Monitor Only
751II-13	Resistivity	0-5 Megohm	Analog Meter	Monitor Only
752II-11	Resistivity	0-20 Megohm	Analog Meter	Monitor & Controller
752II-13	Resistivity	0-5 Megohm	Analog Meter	Monitor & Controller
753II-11	Resistivity	0-20 Megohm	Digital	Monitor & Controller
753II-13	Resistivity	0-5 Megohm	Digital	Monitor & Controller
754II-11	Resistivity	0-20 Megohm	Digital	Monitor Only
754II-13	Resistivity	0-5 Megohm	Digital	Monitor Only
CS10	Sensor for Resistivity Monitors- Polypropylene – 0.05 cell const.

Myron L 750 Series Condutivity/TDS Monitors/Controllers

Model No.	Monitors	Range	Display	Function
756II-111	EC (Electrical Conductivity)	0-50 µS	Analog Meter	Monitor Only
756II-113	EC (Electrical Conductivity)	0-100 µS	Analog Meter	Monitor Only
757II-111	EC (Electrical Conductivity)	0-50 µS	Analog Meter	Monitor & Controller
757II-113	EC (Electrical Conductivity)	0-100 µS	Analog Meter	Monitor & Controller
758II-111	EC (Electrical Conductivity)	0-50 µS	Digital	Monitor & Controller
758II-113	EC (Electrical Conductivity)	0-100 µS	Digital	Monitor & Controller
758II-119	EC (Electrical Conductivity)	0-1000 µS	Digital	Monitor & Controller
759II-111	EC (Electrical Conductivity)	0-50 µS	Digital	Monitor Only
759II-113	EC (Electrical Conductivity)	0-100 µS	Digital	Monitor Only
756II-110	TDS (Total Dissolved Solids)	0-20 ppm	Analog Meter	Monitor Only
756II-112	TDS (Total Dissolved Solids)	0-50 ppm	Analog Meter	Monitor Only
765II-114	TDS (Total Dissolved Solids)	0-100 ppm	Analog Meter	Monitor Only
765II-116	TDS (Total Dissolved Solids)	0-200 ppm	Analog Meter	Monitor Only
756II-120	TDS (Total Dissolved Solids)	0-1000 ppm	Analog Meter	Monitor Only
757II-110	TDS (Total Dissolved Solids)	0-20 ppm	Analog Meter	Monitor & Controller
757II-112	TDS (Total Dissolved Solids)	0-50 ppm	Analog Meter	Monitor & Controller
757II-116	TDS (Total Dissolved Solids)	0-200 ppm	Analog Meter	Monitor & Controller
757II-118	TDS (Total Dissolved Solids)	0-500 ppm	Analog Meter	Monitor & Controller
757II-120	TDS (Total Dissolved Solids)	0-1000 ppm	Analog Meter	Monitor & Controller
758II-110	TDS (Total Dissolved Solids)	0-20 ppm	Digital	Monitor & Controller
758II-112	TDS (Total Dissolved Solids)	0-50 ppm	Digital	Monitor & Controller
758II-114	TDS (Total Dissolved Solids)	0-100 ppm	Digital	Monitor & Controller
758II-114-4A (4-20mA Output)	TDS (Total Dissolved Solids)	0-100 ppm	Digital	Monitor & Controller
758II-116	TDS (Total Dissolved Solids)	0-200 ppm	Digital	Monitor & Controller
758II-120	TDS (Total Dissolved Solids)	0-1000 ppm	Digital	Monitor & Controller
758II-120-4A (4-20mA Output)	TDS (Total Dissolved Solids)	0-1000 ppm	Digital	Monitor & Controller
758II-122	TDS (Total Dissolved Solids)	0-2000 ppm	Digital	Monitor & Controller
759II-110	TDS (Total Dissolved Solids)	0-20 ppm	Digital	Monitor Only
759II-112	TDS (Total Dissolved Solids)	0-50 ppm	Digital	Monitor Only
759II-120	TDS (Total Dissolved Solids)	0-1000 ppm	Digital	Monitor Only

Sensors for Myron L 750 Series Monitors/Controllers

All Myron-L monitors and controllers require a sensor (sold separately). Recommended sensors for most applications are listed in the table below. View the “Sensor Selection Guide” in the Literature tab for additional sensor options.

Sensor Model No.	For Monitor/ Controller Type	Description
CS10	Resistivity	Polypropylene – 0.05 Cell Constant
CS51	Conductivity & TDS	Polypropylene – 1.0 Constant for use between 0-10 and 0-20,000. Includes temperature sensor for ATC. Modular polypropylene bushing.


Myron L Analog Monitor System Controller	Myron L Digital Monitor System Controller	Myron LCS10 Resistivity Sensor CS51 Conductivity Sensor

Myron L 750 Series Water Quality Monitor Features

34 Conductivity/TDS ranges: 0- 1 microsiemens/ppm to 0-200 millisiemens/ppt
7 Resistivity ranges from 0-200 Kilohms to 0-20 Megohms-cm
Choice of 3½ digit display or analog meter
Automatic temperature compensation to 77°F (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
CE Certified
Made in USA

Myron L 750 Series Monitors are CE Certified Myron L Instruments Made in USA

Applications for TDS/Conductivity Monitor System Controllers:

Reverse Osmosis Systems
Process Control
Seawater Desalination Systems
Waste Treatment Systems
Food Processing
Plating
Power Plants
Laboratories
Printing
Aquaculture
Agriculture
Environmental Studies
Medical
Boilers (250 psi @ 205°C)
Cooling Towers

Applications for Resistivity Monitor System Controllers:

Ultrapure Water Treatment Systems
Deionization (DI) Water Treatment Systems
Distillation Water Treatment Systems
Electronics
Pharmaceuticals
Laboratories
Food Processing
Plating
Power Plants
Boiler Condensate
Process Control

Myron L 750 Series Options

Second Alarm/control Module
4-20 mA Isolated Output
Piezo Electric Alarm
3½ or 4½ Digit Backlit Display
Temperature Module
24 VAC Isolated Power Supply
24 VDC Isolated Power Supply