The Differential Series pH/ORP sensors are designed for use with most commercially available analyzers. The reference element is a second glass pH electrode immersed in a reference buffer solution. This glass reference system allows the sensor to be used in applications that poison conventional pH or ORP sensors.
The sensors are classified as either Universal or Loop-Powered,depending on the output selected. The Universal sensors emulate standard, non-amplified combination sensors and are designed to interface with virtually all pH/ORP analyzers. The sensors require no power supply as the preamplifier is powered by an internal lithium battery.
The pH sensor outputs a mV signal in the range of -500 to +500 mV, linear over the 0 to 14 pH range.
The ORP sensor outputs a mV signal that ranges from -1000 to +1000 mV.
The Loop-Powered sensors require an external 7-30 VDC power supply and provide a 4-20 mA output signal for direct connection to generic panel meters, data acquisition systems, or other devices that accept a current input.
The sensor includes integral temperature compensation of the pH signal, so no temperature output is provided.
The sensor output is uncalibrated, therefore, the receiving instrument must be capable of providing user calibration of the pH or ORP signal on a periodic basis.
|Differential Series VL22 pH/ORP Sensor Specifications:
Measuring Range: 0 to 14 pH; -1000 mV to +1000 mV ORP
Temperature Compensation: Pt1000 or Pt100 RTD
Temperature Range: -5 to 95°C (23 to 203°F)
Pressure Range: 0 to 100 PSIG
Max. Flow Rate: 10 feet (3 meters) per second
Max. Sensor to Analyzer Distance: 3000 feet (914 meters) for
Universal and 1000 feet (305 meters) for Loop-Powered
Sensor Body Options: 1" NPT convertible or 1¼ insertion
Wetted Materials: PEEK, ceramic, titanium, glass, Viton®,
EPDM, Platinum, and Stainless Steel with insertion body styles