Thermal flow transmitter CF420


for liquids
Other characteristics
analog output


The CF420 is a flow Transmitter that measures the velocity of liquid flows. The CF420 provides two output options; a 4-20mA output and a PNP switch output. The electronics module converts the signal from the probe to a 4…20mA analog output, which can be used to indicate flow rate. For the PNP output, the measured flow rate is compared to the field calibrated set point value and the Switch changes state once the set point value has been achieved. A chain of 8 LED’s gives the user a visual indication of the flow rate as well as set point status, and one di-chromatic LED indicates switch point status. Like all of Sitron’s products, the CF420 can be configured to accommodate our customer’s unique process control requirements. All models can be ordered with a great variety of threaded, flange, or sanitary process connections or even with separate electronics and process sensor. Application: Flow for Liquids Operating Voltage: DC – 24Vdc (+/- 10%) Consumption: Max. 1VA Output: 4..20mA and PNP output (Max 400mA) Set Point Range: Water : 0.2 to 2 m/s / Oil: 0.4 to 4 m/s Accuracy: +/- 10% Response Time: 3 to 10s Repeatability: +/- 1% Flow Rate Indication: 8 LED’s bragraph / Central Red led – flow is below setpoint / Central Green led – flow is above setpoint Enclosure Material: Nylon Electrical Connection: Cable gland 1/2” NPT or M12 connector Process Connection: ½” to 1 1/2” BSP or NPT, adjustable, sanitary or flanged connections Wetted Material: 316 Stainless Steel Operating Temperature: 14 to 176º F (-10 to 80ºC) or Extended neck to 248ºF (120ºC) Max Pressure: 1450 PSI (100 Bar) or 4500 PSI (300bar) upon request Class Protection: IP65 (IEC 60529)