The capacitance level sensor measuring principle is based on the physical properties of a capacitor formed by the sensor and the vessel wall, the electric capacity is affected by the dielectric value of products. When the sensor is not covered, the dielectric constants =1 (Air is usually =1) when the sensor is covered, the dielectric constant will increase in capacity, the electronic oscillator (1 MEGA Hz radio frequency) will create a resonating signal, which will turn the unit on or off for level control purpose.

• No moving parts inside the device, it will be not affected by friction, which are suitable for powder or

liquid application.

• Various models are suitable for different application.

• Operating temperature -20 ~ 200¢XC, Max. 800¢XC.

• The sensitivity, which includes 10pf, 20pf and 40pf, is adjustable.

• With timing delay design, timing adjustable range 0 ~ 6 seconds.

• Voltage: 110V/220VAC or 24VDC

• Output: NPN transistor, 5A/250VAC and 5A/240VAC SPDT contact.

• Standard connecting screw 1" NPT, special specification are acceptable.

• Enclosure protection IP65 or explosion-proof.

• SA-75U Zener barriers inside provide intrinsic safety (Ex ia IIC) to SA17 ( ) D type level switch.