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The advanced “isolated” circuitry of the 720 Series II pH/ORP Monitor/ controllers guarantees accurate and reliable measurements — completely eliminating ground-loop and noise issues. The unique sensor preamp allows for longer distances between the sensor and the Monitor/controller without the loss of accuracy or reliability.
All Myron L® Monitor/controllers feature a highly refined and precise Temperature Compensation circuit. This feature perfectly matches the NERNST equation correcting the displayed reading to 25°C. The TC may be disabled to conform with USP requirements.
Built-in electronic calibration allows for fast quality checks without buffers. (Note: for maximum system accuracy buffers are recommended).
A push-to-test button makes set point 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 set point readings.
All 720 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., the 720 Series II models are suitable for panel, bench or surface mounting.
Additional options include a Remote Alarm™ model RA.
These highly accurate sensors utilize a preamplifier to ensure stability over longer distances, and to eliminate potential noise problems thereby ensuring accurate repeatable readings.
In addition, these reliable sensors feature an integral temperature sensor to ensure accurate and rapid automatic temperature compensation.
Several choices of sensors are available, in 1/2” MNPT or 3/4” MNPT, depending on the demands of the application. The basic pH sensor utilizes the standard round glass electrode with a single reference junction. The basic ORP sensor utilizes a Platinum electrode with a single reference junction. See 720II Sensor Selection Guide for additional information.
NOTE: Heavy Duty “F” model sensors may be installed in ANY direction including inverted.
| Ranges | 0-14 pH or ±2000 mV ORP |
| Display | Analog Models: 2.5 in./63 mm meter |
| Digital Models: .5 in./13 mm 3½ Digit LCD | |
| Digital Option: 3½ Digit Backlit | |
| Linearity | Electronics: ±0.05% (±0.01 pH units/±1 mV of full scale) |
| Resolution | Analog Meter: ±0.13 pH units/±40 mV |
| Digital Display: ±0.01 pH units/±1 mV | |
| Sensitivity | 0.05% of full scale (0.01 pH units/1.0 mV) |
| Stability | ±0.05% of full scale (±0.01 pH units/±1.0 mV) |
| Repeatability | ±0.05% of full scale (±0.01 pH units/±1.0 mV) |
| Calibration Check | Built-in (7 and 0 pH / 0 and -2000 mV) |
| Recorder Output | Isolated 0-10 VDC @ 5 mA max. (linear); standard all models 100Ω |
| Output Impedance | 100Ω ±5% |
| Sensor Inputs | 1; 3 input option available. |
| (pH & ORP sensors may NOT be mixed.) | |
| Control Function | Single Alarm/controller fully adjustable 0-100% of full scale |
| Hysteresis: Adjustable from 0.3-3% of full scale | |
| Indicators: Above (red) and below (green) set point LEDs (reversible) | |
| Contact Rating: SPDT 10 amp @ 125 VAC, 30 VDC | |
| Relay operates increasing or decreasing reading (selectable) | |
| Second Alarm/controller, with above specifications – optional | |
| Solid State Output | Powered; 24 VDC unregulated 30 mA max. |
| Power | 115/230 VAC, 50/60 Hz, ±15% (user selectable) |
| 24 VAC optional | |
| Maximum Power Consumption | @ 115V: 100 milliamps |
| Dimensions | 152 H x 122 W x 96 D mm / 6 H x 4.8 W x 3.8 D in. |
| Construction | Fully gasketed, heavy-duty ABS case; water resistant and corrosion proof IP65/NEMA 4X rated |
| Ambient Temp Range | 0-60°C / 32-140°F |
| Weight | 0,9 kg/2 lbs. |
Founded in 1957, the Myron L® Company is one of the leading manufacturers of water quality management instruments in the world.
2450 Impala Drive
Carlsbad, CA 92010-7226
Tel.: 1-760-438-2021
Fax: 1-760-931-9189
info@myronl.com
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.