The Insite IG SCA will automatically configure the sensor for correct operation.
It has an alpha-numeric LCD display that is backlit and UV protected. The first line displays the type, reading, and units of the sensor. The second line displays the temperature for DO, pH, and ORP sensors.
The SCA will automatically recognize the sensor type (DO, SS, pH, or ORP) and configure itself for proper operation. The DO sensor is an optical type and does not need membranes, fill solutions, nor routine calibrations and maintenance. The SS sensor is based on near infrared technology, eliminating inaccuracies caused by changes in the process colour . The pH electrode is a flat glass, double reference junction with automatic temperature compensation, built-in preamp and signal conditioner. All sensor/ electrodes have built in self cleaning capabilities that allows for extended periods between maintenance. Simple, menu driven setup ensures quick and easy system installation. Standard outputs are two isolated 4 to 20 milliamp signals, two setpoint relays, one alarm relay, one cleaning relay, and RS-485 ModBus RTU signal. This makes active process control based on real-time data a possibility in almost any system.
Fluorescence Dissolved Oxygen —Theory of operation
A very specific energy wavelength is transmitted to a ruthenium compound immobilized in a sol-gel matrix. The ruthenium will absorb this energy, changing the outer electron’s energy level. The electron will then collapse back to its original energy state, emitting the energy as a photon with a different specific wavelength. This is called fluorescing. If the intensity of the transmitted wavelength is tightly controlled, the amount of fluorescing is both predictable and repeatable. If oxygen molecules are present the amount of fluorescing is reduced, referred to as fluorescence quenching. By measuring the amount of quenching it is possible to determine the amount of oxygen present.