Single function controller
The Wallace & Tiernan® SFC is particularly useful in the measurement and control of disinfectants, allowing devices such as dosing pumps, electric stroke positioners and continuous actuators to maintain accurate and measured concentrations in one single unit.
Markets that will benefit from this new instrument include water, industrial process water, swimming pools, public utilities, food and beverage industries and waste water plants.
The portfolio of measurements available includes parameters such as free chlorine, total chlorine, pH value, redox voltage, conductivity, chlorine dioxide, ozone, potassium permanganate, fluoride and temperature.
Used with the Wallace & Tiernan® SFC PC unit, the SFC offers a choice of four control options. The flow proportional control option enables the adjustment of the feed rate based on the current process flow, whereas the feed forward control adjusts the feed rate in proportion to an external measurement input or optional measurement module. Both closed-loop and compound loop control maintains a desired setpoint based on a measured value, however, the compound loop control also allows for fluctuations in the water flow.
Due to the wide variety of Wallace & Tiernan® SFC options, all conceivable water treatment applications, including single feedback closed-loop control, can be catered for.
The modular design of the SFC consists of an electronic module, a flow cell module and a sensor measuring module. This enables more than one parameter to be measured by simply combining more electronic modules together using a CAN sensor/actuator bus. In this fashion, the interoperability and flexibility of the SFC unit is also compatible with the MFC. In addition, all currently available measurement sensors can be utilised with the Wallace & Tiernan® SFC.
TWallace & Tiernan® SFC also offers screen trending and a SD card for configuration and data storage.