Capacitive Sensors Selection Guide: Technical Criteria & Application Standards
Capacitive Sensors selection guide: technical parameters, mounting and compliance standards, and Isıso comparison.
Capacitive sensors are proximity sensors that detect solid, powder and liquid materials without contact, whether metallic or not, by measuring the change in capacitance caused by an object entering the electric field in front of the sensing surface. They are used to detect granule and powder levels in silos, liquid behind a plastic or glass container, and wood, paper and plastic parts. The category includes Isıso models with M12, M18 and M30 housings, sensing distances such as 4 mm, 8 mm and 15 mm, and flush and non-flush heads; there are NPN and PNP types with 10-30 V DC supply and NO or NC types with 20-250 V AC and 90-250 V AC supply. Choose the housing diameter according to the mounting hole, the sensing distance according to the material, the flush or non-flush head according to the mounting style, the supply according to your DC or AC circuit, and the output according to the PLC input type. The sensing distance depends on the dielectric constant of the material; dry plastic, wood or grain is detected from a shorter distance than water and metal. They must not be confused with inductive sensors; an inductive sensor detects only metal, whereas a capacitive sensor also detects non-metallic materials. The Capacitive Sensors category on Welibaba includes 19 active models from leading manufacturers such as Isıso.
Key Technical Parameters for Selecting Capacitive Sensors
To specify the right Capacitive Sensors model for your panel or installation, verify the following parameters against your engineering schedule:
| Parameter | Typical Catalog Values | Verification Note |
|---|---|---|
| Connection Type | Kablolu | Verify against project schedule and load calculation |
| Sensing Distance | 10 mm, 15 mm, 4 mm, 5 mm | Verify against project schedule and load calculation |
| Body Type | M12, M18, M30 | Verify against project schedule and load calculation |
| Output Type | NC, NO, NPN NO, NPN NO+NC | Verify against project schedule and load calculation |
Installation, Compatibility, and Commissioning Checklist
- Electrical & Mechanical Matching: Confirm that rated voltage, current capacity, and mounting dimensions align with the upstream and downstream components in Industrial Sensors.
- Environmental & Enclosure Rating: Check IP protection class, housing material, and terminal capacity for dusty, humid, or high-vibration industrial environments.
- Related Product Groups: If your application calls for a different form factor or rating, compare sibling categories such as Inductive Sensors, Fiber Optic Sensors and Accessories, Photoelectric Sensors.
Frequently Asked Questions
What is the first parameter to check when selecting Capacitive Sensors?
Start by confirming the circuit's rated electrical values and physical mounting dimensions, then use the technical attribute filters on the Capacitive Sensors page to narrow down compatible series.
Which Capacitive Sensors brands are available on Welibaba?
Welibaba currently stocks 19 active models in this category from manufacturers including Isıso, complete with verified specifications and unit pricing.
How can I compare Capacitive Sensors models by manufacturer part number?
You can search directly by manufacturer SKU/order code or use the category filter panel to compare equivalent models across brands side by side.