Kobold NEK-2273N20C – NEK Compact Conductive Level Switch, PNP, Polypropylene Body, 73 mm, 3/4″ NPT
The Kobold NEK-2273N20C is a compact conductive level switch from Kobold’s NEK series. It has a polypropylene body, 73 mm stainless steel electrodes, a 3/4″ NPT process connection and a PNP open collector output, with a 2 m (6 ft) PVC cable.
The PNP (sourcing) output is the standard choice for most European PLCs and control systems. The NEK detects the level of conductive liquids by applying a low AC voltage to a pair of 316Ti stainless steel electrodes. When the liquid reaches the electrodes, a small current flows between them and the switch changes state. The 73 mm immersion length places the switch point further into the tank than the 36 mm version, which helps where the switch is fitted through a thicker wall, boss or adapter. With no moving or protruding parts, it is well suited to dirty liquids, liquids with high solids content, low-viscosity media and aggressive chemicals. The polypropylene body is a cost-effective choice for low-pressure tanks at moderate temperatures. The switch can be installed horizontally or vertically.
Key Technical Data – Kobold NEK-2273N20C
- Series: Kobold NEK compact conductive level switch
- Measuring principle: Conductive, no moving parts
- Housing: Polypropylene
- Electrodes: Stainless steel 1.4571 (316Ti)
- Immersion length: 73 mm
- Process connection: 3/4″ NPT male
- Max. pressure: 6 bar (approx. 87 psig)
- Operating temperature: –25 to +60 °C (polypropylene body)
- Installation position: Horizontal or vertical
- Output: PNP open collector, max. 32 V / 100 mA, short-circuit proof
- Supply voltage: 18–29 V DC, < 20 mA
- Switching delay: 0.5 s (dry/wet and wet/dry)
- Sensitivity: approx. 50 kΩ
- Min. liquid conductance: approx. 100 µS/cm
- Electrical connection: 2 m (6 ft) PVC cable, 3-core screened
- Degree of protection: IP68
Choosing the Right NEK Version
- NEK-2273N20C: PNP, polypropylene, 73 mm (this item)
- NEK-2236N20C: polypropylene, 36 mm immersion length
- NEK-2173N20C: PPS body (max. 20 bar, +85 °C), 73 mm
- NEK-1273N20C: NPN open collector version
- NEK-3273N20C: relay output (changeover contact)
The output type (PNP or NPN) must match the PLC input. If the switch is installed in a metal tank, the tank must be connected to the NEK supply ground (GND). Our sales team can help you confirm the right version.
Typical Applications
- High and low level detection in small, low-pressure tanks
- Water, wastewater and process liquids with solids
- Chemical media compatible with polypropylene and 316Ti
- Dry-run protection for pumps
Buy Kobold NEK-2273N20C from Atlantech Drives
- Fast sourcing, shipped worldwide
- 12-month warranty
- Senior commercial advice on level switch versions and lead time
- Quick, no-obligation quotes: get a quote today
