Capacitive Level Switch for Liquids & Solids

Level Switch

Capacitive Level Switch

MODEL: ZNC-YW780

Applicable Media: Liquids, Viscous Materials, Powders and Granules
Dielectric Constant: ≥ 1.5
Process Temperature: -40°C to +115°C
Operating Pressure: -1 to +25 bar
Wetted Materials: PEEK + SS304 / SS316L
Output Signal: PNP or NPN (Factory-Selected)
Power Supply: 12–32 VDC
Response Time: 0.2 s
Electrical Connection: M12 4-Pin Connector
Protection Rating: IP67
Applications: High-Level Alarm, Low-Level Detection and Pump Dry-Run Protection

Description

Overview

The ZNC-YW780 Intelligent Capacitive Level Switch provides point level detection for liquids, viscous materials, powders and granules in industrial tanks, vessels and process equipment.

Its high-frequency sensing principle detects changes in material dielectric properties, making it suitable for high-level alarms, low-level monitoring and pump dry-run protection. The compact G1/2 design combines a PEEK sensing tip with stainless steel wetted-part options.

Features

High-Frequency Sensing

Capacitive point level detection with good resistance to foam interference.

Multiple Media Types

For suitable liquids, viscous media, powders and granules.

Compact G1/2 Connection

Space-saving threaded installation in tanks and process equipment.

PEEK and Stainless Steel

PEEK sensing tip with SS304 or SS316L wetted-part options.

Selectable Output

Factory-selected PNP or NPN output and configurable switching delays.

IP67 Protection

Compact industrial design with IP67-rated ingress protection.

Applications

Typical applications of this capacitive point level switch include:

✓Water tank high- and low-level detection

✓Overflow alarm systems

✓Pump dry-run protection

✓Viscous liquid level monitoring

✓Powder and granule level detection

✓Industrial vessel level monitoring

OEM and Customization

ZINACA offers configuration choices for different installation and control requirements:

PNP or NPN output SS304 / SS316L wetted parts M12 connector / flying lead Configurable switching delays

Other application-specific requests are subject to technical feasibility confirmation.

Selection Notes

Medium: Confirm dielectric constant ≥ 1.5 and check material buildup conditions.

Materials: Verify compatibility with PEEK, selected stainless steel and FKM.

Process conditions: Check temperature, pressure and installation position.

Electrical output: Specify PNP or NPN when ordering; confirm final wiring before installation.

Frequently Asked Questions

Can this capacitive level switch detect both liquids and solids?

Yes, for suitable liquids, viscous materials, powders and granules, depending on dielectric properties and process conditions.

Can PNP and NPN outputs be used simultaneously?

No. The output type is factory-selected; PNP is the standard default.

Is it suitable for sticky or coating materials?

Potentially, but applications with significant buildup should be evaluated individually.

Does the ZNC-YW780 measure continuous liquid level?

No. It detects material presence at a fixed point rather than continuous level.

Technical Specifications ZNC-YW780 \| Intelligent Capacitive Level Switch
Parameter	Specification
Sensing & Application
Model	ZNC-YW780
Product Type	Intelligent Capacitive Point Level Switch
Measuring Principle	High-frequency capacitive sensing
Applicable Media	Liquids, viscous materials, powders and granules
Minimum Dielectric Constant	≥ 1.5
Operating Frequency	50–200 MHz
Measurement Hysteresis	±1 mm*
Repeatability	±1 mm*
Process & Mechanical
Process Temperature	−40 to +115 °C
Ambient Temperature	−40 to +80 °C
Operating Pressure	−1 to +25 bar
Process Connection	G1/2 A male thread
Wetted Materials	PEEK + SS304 or PEEK + SS316L
Sensing Tip / Surface	PEEK / Ra less than 0.8 µm
Process Seal	FKM O-ring
Electrical & Switching
Supply Voltage	12–32 VDC
Switching Output	1 × PNP or 1 × NPN (factory-selected; PNP default)
Maximum Output Load Current	20 mA
Output Voltage Drop	Less than 2 V
Operating Current	9 mA
Power Consumption	0.28 W
Dielectric Strength	500 VAC
Electrical Connection	4-pin M12 connector; 4-core flying-lead option
Ingress Protection	IP67
Response & Configuration
Response Time	0.2 s
Blocking Delay	0.2–5 s (10 selectable steps)
Alarm Delay	0–99 s (adjustable)
Configuration Method	Handheld configurator or supported PC software
Status Indicators	Yellow LED: start-up / fault; green LED: alarm indication
Installation Area	Non-hazardous industrial environments
Notes: PNP and NPN are alternative factory-selected outputs, not simultaneous outputs. Confirm the final connector pin assignment before wiring. *Hysteresis and repeatability values are from the supplied reference and should be verified for the intended application.

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