Simulated Long-Rod Capacitive Level Sensor for Glue and Resin Coating

1. Why You Need It

Large container glue-filling and resin-coating machines need a level sensor that reads the material level along the full depth of the vessel — not just at a single point. This simulated long-rod capacitive level sensor uses a Teflon probe that extends into the container, providing continuous contact detection for glue, resin and coating media. It replaces imported gauges on filling machines with a cost-effective, easily configured domestic alternative.

2. Working Principle

The long-rod probe detects the material along its length by capacitive sensing, giving continuous level indication for glue and resin in large containers. The Teflon probe resists adhesion, while the potentiometer or handheld setter adjusts the switch point. The NPN output with configurable NC/NO action and an M12 connector make it easy to integrate into glue-filling and resin-coating machine controls.

3. Key Advantages

• Continuous long-rod detection
• Built for glue and resin coating
• Teflon probe resists adhesion
• NPN output (NC/NO switchable)
• Potentiometer or handheld setting
• M12 connector interface
• DC 24 V supply
• 3 bar pressure resistance
• 0 to 60 °C operating range
• Replaces imported gauges

Common Pain Points & Solutions

Application Cases

Technical Specifications

FAQ

Q: What is a long-rod capacitive level sensor?

A long-rod capacitive level sensor uses an extended probe to detect material level along the full depth of a container, rather than at a single point. This provides continuous level detection for glue, resin and coating media in large vessels and filling machines.

Q: Why is Teflon used for the probe?

Teflon (PTFE) is highly non-stick and chemically resistant, so glue, resin and coating materials do not build up on the probe. This keeps the sensor accurate and reduces cleaning and maintenance in adhesive applications.

Q: What output does it provide?

It provides an NPN output whose action can be switched between normally-closed (NC) and normally-open (NO). This flexibility lets the sensor match the control logic of the glue-filling or coating machine.

Q: How is the switch point set?

The switch point is set via a potentiometer or a handheld setter. This allows the operator to adjust the detection level to suit the container and the specific glue or resin application.

Q: Can it replace imported gauges?

Yes. It is designed as a cost-effective domestic replacement for imported level gauges on large-container glue-filling and resin-coating machines, matching their function at a lower cost.

Q: What is the detection accuracy?

The detection accuracy is within 3% of the maximum detection range. This is sufficient for level control in glue-filling and resin-coating machines where precise level point detection is needed.

Q: What pressure can it handle?

It withstands up to 3 bar of process pressure, covering pressurized glue and resin dispensing systems as well as atmospheric vessels.

Q: How is it connected?

It connects via an M12 connector, a standard industrial electrical interface. The DC 24 V supply and NPN output wire directly into the machine's PLC or control relay.

Q: What temperature range does it cover?

It operates from 0 to 60 °C, covering the ambient and process temperatures typical of glue-filling and resin-coating operations.

Q: Where is it used?

It is used on glue-filling machines, resin-coating machines, adhesive dispensing systems and woodworking glue applicators. It provides continuous, adhesion-resistant level detection for adhesive media.