Product Overview

Capacitive Bin Level Switch is a point level detection device that monitors the presence or absence of liquids, powders, granules, and bulk solids by sensing changes in capacitance. It is widely used in storage tanks, silos, hoppers, and process vessels for high and low level control.

Key Features

Capacitive sensing technology detects level changes without moving mechanical parts, reducing wear and maintenance.
NPN or PNP output options simplify integration with PLCs, relays, and industrial control systems.
Multiple insertion depths available to suit different vessel sizes and installation requirements.
Compact G1/2 threaded process connection enables fast installation on tanks, bins, and hoppers.

Typical Applications

Grain storage silos

Powder processing hoppers

Plastic pellet bins

Cement storage vessels

Chemical dosing tanks

Water treatment tanks

Food ingredient containers

Bulk material handling systems

High-level overflow protection

Low-level empty tank detection

Technical Specifications

HNL60-A Capacitive Level Switch Parameters
Specific Parameters	Value / Description
Measurement Principle	The HNL60-A capacitive level switch is based on the principle that capacitance changes with the dielectric constant of the medium. The probe and the container wall (or the built-in reference electrode) form the two poles of the capacitor. When the liquid level rises, the capacitance changes abruptly as the high-dielectric-constant liquid (such as water with a dielectric constant of approximately 80) replaces the low-dielectric-constant air (with a dielectric constant of approximately 1). The built-in electronic circuitry detects this change, and when a preset threshold is reached, it triggers the switch to activate, outputting an on/off signal.
Product Type	Standard type ED sealing ring
Insertion Depth	20mm,30mm,35mm,50mm,100mm,Customizable
Measurement Accuracy	±1mm
Output Signal	NPN,PNP
Power Supply	24VDC
Mechanical Interface	G1/2
Electrical Interface	Hirschmann/connector
Material	304, PEEK
Temperature Range	0～100℃
Certificate	CE certified

OEM & Customization

Insertion Depth: 20mm, 30mm, 35mm, 50mm, 100mm, or custom lengths
Probe Material: 304 stainless steel, PEEK, or specified materials
Process Connection: G thread, NPT thread, BSP thread, or customized fittings
Electrical Connection: Hirschmann connector, cable outlet, aviation connector, or specified connector type
Switching Point Adjustment: Factory preset or customer-defined sensitivity settings
Housing Marking: Custom logo, model number, and private labeling
Packaging Service: OEM packaging, barcode labels, and customized cartons
Documentation: Customized manuals, labels, inspection reports, and certificates

Certifications & Compliance

CE - Compliance with applicable EU safety, health, and electromagnetic compatibility requirements
RoHS (Optional) - Restriction of hazardous substances in electrical and electronic equipment
EMC Compliance - Electromagnetic compatibility for industrial environments
Factory Calibration Report (Optional) - Verification of switching performance before shipment

FAQ

Q: What is the working principle of a capacitive level switch?

A: The sensor detects changes in capacitance between the probe and the vessel wall (or reference electrode). When material contacts the probe, the dielectric constant changes and triggers the switching output.

Q: Can this level switch detect powders and bulk solids?

A: Yes. It can be used for powders, granules, pellets, grains, and many bulk solid materials, provided the material has sufficient dielectric properties for capacitive detection.

Q: Does the sensor require direct contact with the material?

A: Yes. The probe is installed inside the vessel and detects level changes when the medium reaches the sensing area.

Q: What is the minimum order quantity?

A: Standard MOQ is typically 10 pieces for regular models. OEM orders may require higher quantities depending on customization requirements.

Q: What is the typical production lead time?

A: Standard products are generally shipped within 5–10 working days. Customized orders typically require 2–4 weeks depending on specifications and order volume.

Q: Are OEM and private label services available?

A: Yes. OEM services include logo printing, customized labels, packaging, documentation, and specification adjustments according to project requirements.

Q: What warranty is provided?

A: A standard 12-month warranty is available against manufacturing defects under normal installation and operating conditions.

HNL60-A Capacitive Level Switch Parameters
Specific Parameters	Value / Description
Measurement Principle	The HNL60-A capacitive level switch is based on the principle that capacitance changes with the dielectric constant of the medium. The probe and the container wall (or the built-in reference electrode) form the two poles of the capacitor. When the liquid level rises, the capacitance changes abruptly as the high-dielectric-constant liquid (such as water with a dielectric constant of approximately 80) replaces the low-dielectric-constant air (with a dielectric constant of approximately 1). The built-in electronic circuitry detects this change, and when a preset threshold is reached, it triggers the switch to activate, outputting an on/off signal.
Product Type	Standard type ED sealing ring
Insertion Depth	20mm,30mm,35mm,50mm,100mm,Customizable
Measurement Accuracy	±mm
Output Signal	NPN,PNP
Power Supply	24VDC
Mechanical Interface	G1/2
Electrical Interface	Hirschmann/connector
Material	304, PEEK
Temperature Range	0～100℃
Protection Level
Certificate	CE certified
Ordering Information	-

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