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 25. 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 750 Series II models feature an IP64/NEMA 3 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. Accessories include a 3 Sensor input, a 3 Range switch (both installed separately from the monitor / controller) and a RA - Remote Alarm.