Capacitive Proximity Sensors for Non-metal & Liquid Detection.
XSZ capacitive proximity sensors detect liquids, powders, plastic, glass, paper, wood, granules and other non-metal materials. They are suitable for level control, packaging verification, hopper monitoring and applications where inductive sensors cannot detect the target.
Detect materials that inductive sensors cannot see
Capacitive proximity sensors respond to changes in capacitance caused by the target material. This makes them useful for non-metal objects, liquid level detection and bulk material monitoring.
Non-metal Detection
Detect plastic, glass, paper, wood, rubber, cartons, powders, grains and other materials that metal-only sensors cannot detect.
Liquid Level Control
Monitor water, oil, chemicals or other media in tanks, tubes, plastic bottles and containers without direct contact.
Adjustable Sensitivity
Fine-tune the sensing threshold to detect the target medium while reducing false triggers from container walls, dust or background objects.
Use capacitive sensors for level, filling and non-metal presence detection
Capacitive sensors are practical when the target is liquid, powder, granule, packaging material or a non-metal object that requires non-contact detection.
- Liquid level detection in plastic tanks, bottles, pipes and transparent containers
- Powder, grain and plastic granule level monitoring in hoppers and silos
- Packaging content detection for cartons, bags, boxes and containers
- Plastic, glass, wood, rubber, paper and non-metal object presence detection
- Food, beverage, chemical, packaging and injection molding equipment
- OEM equipment supply with custom cable, connector, label and sensitivity setup
Match the sensor to the material and detection task
Capacitive sensing performance depends on the target material, density, moisture, container wall and installation environment. Use this table to start model selection.
| Target Material | Typical Use | Selection Focus | Buyer Note |
|---|---|---|---|
| Water / liquid | Level detection in tanks, bottles and pipes | Container wall, liquid conductivity and mounting distance | High dielectric liquids are usually easier to detect |
| Oil / chemicals | Non-contact level control and process monitoring | Medium type, safety requirement and housing material | Confirm chemical compatibility and sealing requirements |
| Plastic / glass | Object presence and container detection | Target thickness, distance and background suppression | Low dielectric materials may need shorter distance |
| Powder / granules | Hopper, silo and feeding equipment monitoring | Dust buildup, density change and vibration | Sensitivity should be adjusted for stable feeding signals |
| Carton / paper | Packaging line detection and content checking | Package thickness, filling state and speed | Useful for full/empty checks when photoelectric sensing is difficult |
Detect liquid or material through non-metal container walls
Capacitive sensors can often detect liquid, powder or granules through plastic or glass walls. The result depends on wall thickness, target material, sensing distance and sensitivity setting.
Good Fit
- Plastic or glass container wall
- Water-based liquid or high dielectric material
- Stable mounting distance and fixed container position
- Adjustable sensitivity with enough installation margin
Needs Testing
- Thick wall or irregular container shape
- Low dielectric material such as some oils or dry powders
- Material buildup on the sensor face or container wall
- Nearby objects causing background influence or false signals
Confirm the real material and environment before ordering
Capacitive sensors are sensitive to material, moisture, dust and surrounding objects. Confirming these details early helps reduce false signals, missed level detection and repeated sample changes.
What material is inside?
Water, oil, powder, plastic granules and cartons behave differently. Send the exact medium so the sensitivity range can be selected correctly.
What wall or package is between?
Plastic wall, glass wall, carton thickness and container position affect detection. Wall material and thickness should be confirmed before testing.
Will dust or buildup appear?
Powder, moisture, residue and material buildup can change the sensing condition. Choose proper mounting and cleaning access for stable operation.
Build the capacitive sensor around your material and machine layout
XSZ supports capacitive sensor configurations for level control, packaging machinery, feeding systems and OEM automation equipment.
Housing and Installation
Choose housing size, sensing face, threaded body, cable direction and mounting position based on tank, hopper or machine space.
- M18 / M30 and common industrial housings
- Flush or non-flush installation by model
- Bracket and container-wall mounting support
Sensitivity and Output
Match the sensor response to the target material, controller input and machine control logic.
- Adjustable sensitivity options
- NPN or PNP output
- NO, NC, DC or AC options by model
Cable and Branding
Customize details for OEM equipment, distributor product lines or replacement projects.
- Cable length and connector type
- Private label and wiring diagram
- Packaging and batch supply support
Stable capacitive detection depends on material, distance and adjustment
Instead of choosing only by catalog sensing distance, confirm the real medium, container wall, installation gap and environment. This helps XSZ recommend a model with enough sensing margin.
Material dielectric behavior
Water-based liquids are usually easier to detect. Oils, dry powders and low-density materials may require closer distance or sample testing.
Wall thickness and distance
Plastic, glass or package walls reduce the available sensing margin. Provide wall material, wall thickness and target distance.
Sensitivity and background
Correct adjustment helps detect the intended material while reducing false triggers from brackets, residues, nearby objects or operator movement.
| What to Confirm | Why It Matters | What to Send XSZ |
|---|---|---|
| Target material | Different materials create different capacitance changes | Liquid, powder, plastic, glass, carton, granule or exact medium name |
| Container or wall | Wall material and thickness affect through-wall detection | Plastic, glass, tube, tank, carton thickness or installation photo |
| Working distance | Practical distance may be lower than rated distance | Gap between sensor face and material or container wall |
| Environment | Dust, humidity, residue and vibration can change the signal | Temperature, moisture, dust, buildup and cleaning condition |
Send your material and installation details for a suitable model suggestion
Tell us the material to detect, container wall, working distance, output type and environment. XSZ engineers can help narrow down the right capacitive proximity sensor for your machine.
Share Material
Send liquid, powder, plastic, carton, glass or exact medium information.
Confirm Setup
Provide container wall, sensing distance, mounting photo and environment conditions.
Get Model
Receive suitable series, sensitivity guidance, sample suggestion and OEM options.
XSZ supports capacitive sensor selection, sampling and OEM supply
Work with a sensor manufacturer for application review, sample confirmation, private label, cable and connector customization, batch supply, export packing and distributor cooperation.
Compare other XSZ sensor options for your automation project
If capacitive sensing is not the best fit, these related product pages can help you choose the right detection principle.