The induction surface of capacitance sensor is composed of two coaxial mental electctrodes, which from a capacitor and connected on RC oscillation circuit, just like an open capacitor electrode.

When connecting to power supply, RC oscillator does not work. When an object is clos eto capacitor electrode, the capacitor capacity will increase, and the oscillator will vibrate. Through the treatment of behind stage circuit, both signals of stop oscillation and oscillation will be converted to switch signs for checking the existence of object. this distance can be obtained, but to nonmetal object, the action distance is d etermined by material dielectric constant, the more dielectric constant, the more action distance will be obtained.

DETECTION DISTANCE 0-25mm
Flush	DC 6-36 VDC   AC 90-250 VAC	NPN	NO	CM37-3025NA
			NC	CM37-3025NB
			NO+ NC	CM37-3025NC
		PNP	NO	CM37-3025PA
			NC	CM37-3025PB
			NO+ NC	CM37-3025PC
		SCR Control- lable silicon	NO	CM37-2025A
			NC	CM37-2025B
Detectable object'				conductor and dielectric body
Consumption current				DC<15mA,AC<10mA
Controloutput				DC:200mA,AC:300mA
Output voltagc dropDC/AC				DC<3V,AC<7V
DC/AC Response frequency				DC:50Hz,AC:10Hz
Shell material				ABSPlastic
Working environment temperature				-25ºC~70ºC
Insulation resistance				50MΩ
Protection structure				IECstandard lp54

1. Liquid level measurement-plastic or glass container
2. Material level measurement
3. Checking for broken board
4. Count the bottles
5. Detect the tightness of conveyor belt
6. Counter and detect the material level