Inductive Proximity Sensors — Precise Non-Contact Metal Detection
An inductive sensor is a non-contact device that detects the presence of metallic objects at distances from 1 to 40 mm without physical touch. The operating principle is based on changes to the electromagnetic field of an LC oscillator: when metal enters the sensing zone, eddy currents are induced that dampen oscillations — the electronics detect this change and generate a discrete or analog output signal. Inductive sensors are the most widely used type of industrial sensor worldwide, thanks to their absolute immunity to dust, moisture, oils, and vibrations. The chastotnik.ua catalog features industrial sensors from leading European and Japanese manufacturers for production automation.
How to Choose an Inductive Sensor: Step-by-Step Guide
Proper selection depends on four parameters: sensing distance, housing diameter, output type, and protection rating. Below is a reference table of typical solutions for different tasks:
| Housing Diameter | Sensing Distance Sn (Steel) | Sn for Aluminum | Typical Application |
|---|---|---|---|
| M5 | 0.8 mm | 0.3 mm | Micro-positioning, printing machines |
| M8 | 1.5–2 mm | 0.6–0.8 mm | Part counting, packaging equipment |
| M12 | 2–4 mm | 0.8–1.6 mm | Conveyor lines, CNC machines |
| M18 | 5–8 mm | 2–3.2 mm | Metalworking, automated production lines |
| M30 | 10–15 mm | 4–6 mm | Heavy industry, crane equipment |
Reduction factor for non-ferrous metals: aluminum — 0.4; brass — 0.5; copper — 0.3; stainless steel — 0.7. Choose a model with a 30–50% margin over the actual working distance to compensate for vibration, temperature drift, and mounting wear.
Output Types: NPN, PNP, Analog
The output type is determined by the controller to which the sensor connects. PNP (sourcing) is the standard for Europe and Ukraine, compatible with Siemens, Schneider, and ABB PLCs. NPN (sinking) is used with Asian controllers from Mitsubishi, Omron, and Keyence. Models with 4–20 mA analog output are also available for tasks requiring precise distance measurement (e.g., shaft runout monitoring). Switching logic: NO (normally open) — signal when object appears, NC (normally closed) — signal disappears when object appears. Universal NO+NC models allow mode selection during installation.
Inductive Sensor Manufacturers in Our Catalog
We work with manufacturers whose products comply with IEC 60947-5-2 standards and hold CE, UL certifications:
- Sick — Germany. Industry leader in industrial sensing: full range of housings from M5 to M30, switching frequency up to 5,000 Hz, IME and IMS series for harsh environments
- Siemens (SIRIUS 3RG) — full integration with SIMATIC S7, ET 200SP, IO-Link support for diagnostics and configuration via operator panels
- Pepperl+Fuchs — specialization in explosion-proof (ATEX/IECEx) and high-temperature solutions for the oil and gas industry
- IFM — Germany. Compact housings, built-in IO-Link, IF/IG series with a 5-year warranty
- Keyence — Japan. Miniature M3/M4 housings, highest switching frequency, ideal for high-speed production lines
- Autonics — South Korea. Optimal price-to-quality ratio for standard automation tasks
- Wenglor — compact sensors for food and pharmaceutical industries, hygienic V4A housings
- Baumer — Switzerland. Precision sensors for robotics and servo drive systems
Industrial Applications of Inductive Sensors
Inductive sensors address dozens of industrial automation tasks:
- Conveyor systems — counting metal parts, flow monitoring, jam detection
- CNC machines — axis limit switches, workpiece clamping verification, tool breakage detection
- Presses and stamping machines — stroke control, emergency stop on path overrun
- Packaging equipment — mechanism position detection, cap sealing verification
- Robotics — home position detection, gripper part-presence verification
- HVAC and water treatment — damper and valve position monitoring
Inductive Sensors by Application Type
Select the right category for precise matching:
- All industrial sensors — complete sensor product catalog
- Proximity sensors — capacitive, ultrasonic, magnetic types for non-metallic objects
- Optical sensors — photoelectric sensors for long distances and small parts
- Pressure sensors — for hydraulic, pneumatic, and vacuum systems
- Level sensors — liquid and bulk material level monitoring
Warranty, Delivery, Expert Selection
Every inductive sensor in our catalog carries an official manufacturer warranty of 12 months or more. Our engineers assist with selection based on your technical requirements — send your parameters (mounting diameter, sensing distance, supply voltage, output type, IP protection rating) and receive a recommendation within one business day. Delivery via Nova Poshta across Ukraine: Kyiv, Kharkiv, Odesa, Dnipro, Lviv, Zaporizhzhia. Invoice payment for businesses or cash on delivery for individuals.
