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 The unique circuitry of our 750 Series II Resistivity Monitor/Controllers guarantee 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. Uncompensated models available to conform with USP 24.
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/below setpoint readings.
All 750 Series II models feature a IP64/NEMA 3X splash and corrosion proof rated enclosure while being a compact size at 6x4.8 inches (15.2x122mm). They are suitable for panel, bench or surface mounting.
Additional options include a 3 Sensor input, a 3 Range switch (both installed separately from the monitor/controller), and a RA™ - Remote Alarm. Custom and OEM Models available. Contact us with your requirements.
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Applications
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Deionization (DI) and distillation ultrapure water treatment systems
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| Electronics |
| Pharmaceuticals |
| Laboratories |
| Food Processing |
| Plating |
| Power Plants |
| Boiler Condensate |
| Process Control |
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Features
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| Seven Ranges: 0-200 Kilohms to 0-20 Megohm-cm |
| Choice of analog meter or 3.5 digit LCD |
| Automatic temperature compensation to 25°C |
| IP64/NEMA 3X splash & corrosion proof enclosure |
| Single setpoint/alarm standard |
| Adjustable setpoint hysterisis |
| Solid state output |
| 10 amp relay operates on choice of increasing or decreasing reading |
| LED's show "above/below" alarm/control status |
| Push-to-test set point check |
| Internal set point discourages unauthorized adjustment |
| Unique, easily installed sensor |
| Selectable 115/230VAC |
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Resistivity Monitor/controller Specifications
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| Ranges |
Resistivity: 7 ranges from 0-200Kilohm to 0-20Megohm |
| Readout |
| Models 751II & 752II - 2½" (63mm) analog meter |
| Models 753II & 754II - 1/2" (13mm) 3½ digit LCD; opt. 4½ digit backlit LCD |
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| Accuracy |
| Models 751II & 752II - ±2% of full scale |
| Models 753II & 754II - ±1% of full scale |
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| Sensitivity |
0.05% of full scale |
| Stability |
0.05% of full scale |
| Repeatability |
0.1% of full scale |
| Calibration Check |
Built in |
| Voltage
Output |
0-10 VDC @ 5 mA max. (linear); standard all models |
| Sensor Inputs |
1 (3 input option available) |
| Control Function |
| Single alarm/controller - |
fully adjustable 0-100% of full scale |
| Second alarm/controller - |
with above specs, opt. on 752II & 753II |
| Hysterisis - |
Adjustable from 0.3-3% of full scale |
| Indicators - |
Above (green) and below (red) setpoint LEDs (reversible) |
| Contact Rating - |
SPDT 10 amp @ 250 VAC, 30 VDC. Relay operates with increasing or decreasing reading (user selectable) |
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| Solid State Output |
Powered; 24VDC unregulated 30mA max. |
| Power |
115/230 VAC, 50/60 Hz, ±15% (user selectable) |
| Maximum Power Consumption |
100mA @115VAC |
| Dimensions |
6" (152mm) H x 4.8" (122mm) W x 3.8" (96mm) D |
| Construction |
Fully gasketed heavy-duty ABS case; splash & corrosion proof IP64/NEMA 3X rated |
| Ambient Temperature Range |
32°F (0°C) to 140°F (60°C) |
| Weight |
2 lbs (0.9 kg) |
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