Nivocap RF-Capacitance

The NIVOCAP CK-100 series new generation capacitance level switches unlike the traditional capacitive principle they operate as capacitance meters in the RF (radio-frequency) range. The most advantageous feature of this technique is that the instrument has great build-up immunity, therefore the NIVOCAP CK-100 is an excellent choice for those adhering, sticky substances where the rival vibrating or the other contacting measurement technologies are not applicable. The mechanical construction consists of a stainless steel probe and a reference probe between two insulations. The intelligent microcontroller based electronics of the NIVOCAP CK evaluates continuously the voltage level proportional to the capacitance difference between the two probes and the housing. This way it provides more stabile measurement compared to the analogue capacitance switches. The units are available only with paint coated aluminium housing, because one reference point of the measurement is the housing itself. An insulated section of the probe called the guard-ring allows that the material build-ups on the probe can be ignored preventing false switching. The maximal probe length of the NIVOCAP CK series is 3 meter (10 feet) in case of the rod extended types and the cable extended versions can be ordered up to 10 meter (33 feet) probe length. The high temperature and the Dust-Ex approved models are suitable for using in harsh environments so they can be ideal choice for power generation applications.

Operating Principle:

RF-Capacitive

Features:

Intelligent electronic level switch
Built-up immunity
Easy calibration
Selectable sensitivity
Fail-safe operation mode
Rod or cable extended versions
Calibration with external magnet
High temperature version
Dust-Ex models

Application:

For adhering, sticky materials
For solids with r  1.5 relative dielectric constant and liquids
Pharmaceutical and food industry
Power generation processes

Specification:

Probe length 400 … 600 mm (1.3 … 2 feet) 700 mm … 3 m (2.3 …10 feet) 1 … 10 m (3.3 … 33 feet)
Material of wetted parts DIN 1.4571 / 316Ti stainless steel + PPS insulation
Probe: DIN 1.4571 / 316Ti stainless steel + PPS Insulation;
Cable: PE coating
Process connection ¾”, 1”, 1 ½” BSP / NPT threaded connection; as per order codes
Ambient temperature -30 °C … +65 °C (-22 °F … + 149 °F)
Medium temperature Standard: -30 °C … +110 °C (-22 °F … 230 °F),
High temperature type: -30 °C … +235 °C (-22 °F … 455 °F)
-25 °C … +90 °C
(-13 °F … + 194 °F)
Process pressure Max. 3 bar g (0.3 MPa / 43.5 psi g)
Response time (selectable) 0.15 – 15 sec
Sensitivity Coarse settings: Selectable with push button out of 4 ranges; 4 indication LED
Fine adjustment: with potentiometer within the selected range
Fail-safe mode Low, high (selectable with DIP-switch)
Calibration With push button or external magnet
Status display Status LED, Calibration LED
Power supply 20 – 255 V AC/DC
Power consumption  2.5 VA / 2 W
Housing material Paint coated aluminum
Electrical connection
2 x M20x1.5 plastic cable glands, for 6…12 mm (0.25…0.5 inch) cable +
2 x NPT ½ ” internal thread for cable protective pipe
2 pcs. terminal blocks for 0.5…1.5 mm2 (AWG 20 … AWG 15) wire cross section