The unique circuitry of the 750 Series II Conductivity 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 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. Additional Details ------------------------------ Product description: The unique circuitry of the 750 Series II Conductivity 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 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.