Capacitive Level Meter
Typ: NMC

Development at the highest level

The KOBOLD capacitive level indicators type NMC serve to measure liquid levels in tanks. They consist of a measuring probe and a connecting head with a plug-in evaluation module.

Depending on the operating conditions, different probes are available. The devices do not have any mechanically moving parts and therefore hardly any mechanical wear. The plug-in evaluation module can de changed easily so that the devices are really easy to maintain.

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  • Water or waterlike liquids
  • Liquid food
  • Chemical and aggressive liquids
  • Oil
  • Pharmaceutical liquids
Technical data

Measuring principle: capacitive (for liquids up to 1000 pF)

Probe length: 265…4000 mm (shorter versions on request)

Measuring error: <1,5 % of probe length

Temperature of medium:

  • -20 … +90 °C
  • -20 … +200 °C for NMC-H

Ambient temperature: -10 … +60 °C

Max. Pressure: -1 … +30 bar

Media DC-value: εr = min. 1,5


  • Housing: Polycarbonate
  • Process connection:
    • stainless steel 1.4305 (model NMC-N, NMC-H, NMC-T)
    • PVDF (model NMC-S)
    • Probe: stainless steel with PTFE coating (for model NMC-N and NMC-H)
    • PVDF-coating for model NMC-S
    • stainless steel probe 1.4305 with internal sensor (stainless steel for PTFE coating) for model NMC-T

Process connection:

  • G 1 male for model NMC-N, NMC-H, NMC-T
  • G 2 male for model NMC-S
  • Adapter for model NMC-N, NMC-H, NMC-T: thread G 1 ¼, G 1 ½
  • welding-in sleeve (not for NMC-S) Ø external 40 mm


  • 4-line LCD, alphanumeric
  • Display of % and mA (with one position after the decimal point)

Power supply:

  • 10 … 35 VDC
  • 12…30 VDC for ATEX

Electrical connection: 1 x M20 x 150

Output: 4-20 mA, 2-wire

Ingress protection: IP 65


Ex II 2/1 GD Ex ia IIC T4 Gb/Ga

Ex ia IIIC T85 ºC Db/Da

20 ºC<Ta<+60 ºC