Technology

Sitron's line of thermal flow switch is based on the principle of thermal dispersion. A typical configuration uses two platinum Resistance Temperature detectors (RTD's) set within the tip of the sensor. One RTD is heated a few degrees above the temperature of the medium and the other RTD is used as a reference, sensing the actual process temperature. The second RTD also monitors the temperature of the medium, as any changes in temperature must be compensated for in the first RTD. As the process medium flows over the tip of the sensor it disperses some of the heat from the first RTD. The temperature change between the two RTDs signals the probe's electronics and the switch changes state once the set point has been reached. For the CF420, the microprocessor-based electronics constantly updates and reviews the signals received, in return putting out a 4-20mA analog output signal, which is proportional to the flow rate.

Features

Simple to install & low in costNo moving parts-maintenance free reliability Optimal temperature compensation Can operate in temperatures up to 248ºF (120ºC) Have a maximum working pressure of 4350PSI (300 bar). Choice of output signal Chain of 8 LED's-Integrated flow rate/set point indication Fast response time for flow or level Excellent low flow sensitivity Can be coated for aggressive mediums Insensitive to dirt and most particles Available in threaded, sanitary and adjustable insertion length connections approved

Sitron-USA, Inc. 21 West Nicholai St. Hicksville, NY 11801 Ph:(516) 935-8001 Fax: (516) 935-6001 e-mail: www.sitron.cominfo@sitron.com -