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日本东和TOWA电容式水平传感器CA-A1SA产品介绍
2013/8/26 15:32:54
浏览：1678
(CAPACITANCE TYPE LEVEL SENSORS)
★CA-A1SA
Capacitance type level sensors consist of ground and electrodes and an electronic circuit,enabling electrodes to function as capacitors.
Conditions determining the capacitor capacity include shape,dimensions,and layout if conditions other than relative permittivity (*1) of the object measured are the same,the capacitor capacity depends on the relative permittivity of the object messured.Taking the capacity of air measured by the sensor as the reference,we identity differences among measured objects having different relative permittivity.If we take 1 of 2 measured objects having different relative permittivity as a reference,we can discriminate between the 2 objects.The discrimination signal is provided as output.
*1.Relative permittivity(specific inductive capacity or dielectric constant) is the ratio of the electrical capacity,the space between capacitor electrodes is filled with an insulator(dielectric), to the electrical capacity when the material is removed to make a vacuum and the value is a constant determined by the type of substance.
FEATURES
Selectable sensitivity with dip switches,high,normal,low and extra-low,easy calibration.Robustness against electrostatic stability,wide variety probe design.
Supply voltage:100V/200V AC±10%(50/60HZ)
Mounting:Threaded with R1"
Power consumption:2.0VA
Output:1C relay 250V AC,3A(resistance load)
30V DC,3A(resistance load)
Working pressure:980kpa
Protection:IP65
Painting color:Munsell 10YR 7.5/14
Stable detection at High sensitivity:0.5~10pF
Normal sensitivity:2~20pF
Low sensitivity:5~100pF
Extra=low sensitivity:≥20pF
Allowable temperature:
Outside the tank -10~60℃
Inside the tank -20~80℃
Timer function:On=delay timer setting from 0 to about 10 sec.(variable)
CA-A3SA,CA-A8FA,CA-A4SA,CA-A1WA,CA-B1SA,CA-A4XA,CA-A2SA,CA-A1SA-025,CA-A1SA-050,CA-A1SA-075,CA-A2SA-025,CA-A2SA-050,CA-A2SA-075