Understanding the type of FOK959S-M is essential for professionals and hobbyists involved in electronic components, industrial machines, or consumer-grade modules. In this article, we explore the classification, design attributes, functional categories, and core usage areas of the FOK959S-M component.
FOK959S-M Profile Biography Table
| Attribute | Details |
| Model Name | FOK959S-M |
| Type | Proximity Sensor (Inductive) |
| Manufacturer | Varies (OEM/Aftermarket) |
| Primary Use | Object detection in automation and robotics |
| Form Factor | Cylindrical, shielded housing |
| Mounting Type | Threaded barrel with nuts |
| Operating Voltage | 10V – 30V DC |
| Output Type | NPN or PNP, normally open |
| Sensing Distance | 2mm to 8mm (model-dependent) |
| Environmental Rating | IP67 (dustproof and waterproof) |
Understanding the Type of FOK959S-M
The type of FOK959S-M is best categorized under inductive proximity sensors. These sensors are widely used to detect the presence of metal objects without direct contact, making them ideal for automated environments.
Construction and Design Classification
FOK959S-M falls under the cylindrical inductive sensor category. This type is often threaded and encased in stainless steel or nickel-plated brass for durability. The design enables flush or non-flush mounting, affecting its sensing distance.
Functional Type: Inductive Sensor
As an inductive sensor, the FOK959S-M operates on the principle of electromagnetic induction. It emits an oscillating magnetic field that gets disturbed when a metal object enters the sensing zone, causing the output state to change.
Electrical Configuration and Type
The electrical type of FOK959S-M can be either:
- NPN (Sinking) – Connects the load between output and power.
- PNP (Sourcing) – Connects the load between output and ground.
These configurations define how the sensor connects to the controller or relay module.
Input Power Type and Range
The sensor operates with DC power supply, commonly between 10V to 30V. This low voltage ensures compatibility with industrial PLCs and embedded systems like Arduino or Raspberry Pi.
Output Type and Behavior
The most common output behavior is Normally Open (NO). However, some variants also include Normally Closed (NC) options, which can be selected based on safety or control logic requirements.
Type Based on Application Field
FOK959S-M sensors are used in:
- Manufacturing – For automation and assembly line object detection
- Packaging – To count or track metallic objects
- Robotics – As metal object proximity triggers
- Security Systems – As door sensors or access switches
Each use case may demand a variation in sensing distance or output logic, though the core sensor type remains inductive.
Environmental Suitability
This sensor type typically holds an IP67 rating, meaning it is protected from dust ingress and can survive short-term water immersion. Thus, it belongs to the rugged industrial sensor type.
How to Identify the Correct Type
To ensure you are selecting the right type of FOK959S-M, consider the following:
- Mounting requirements (flush or non-flush)
- Target metal size and type
- Required sensing distance
- Circuit logic (PNP vs. NPN)
- Environmental exposure
These criteria help narrow down the exact variant that suits your needs.
Comparison with Other Sensor Types
| Parameter | FOK959S-M (Inductive) | Photoelectric | Capacitive |
| Target Type | Metal only | Any (visible) | Solid/Liquid |
| Sensing Range | Short (up to 8mm) | Long (up to 2m) | Medium (up to 50mm) |
| Sensitivity to Dirt | Low | High | Medium |
| Price Range | Affordable | Moderate | Moderate |
This confirms that the FOK959S-M type sensor is highly suitable where short-range metallic detection is required with high reliability.
Common Variants of FOK959S-M
Different manufacturers produce variants with suffixes such as:
- FOK959S-MN: NPN, Normally Open
- FOK959S-MP: PNP, Normally Open
- FOK959S-MC: PNP/NPN, switchable
- FOK959S-M2: Sensing range of 2mm
- FOK959S-M8: Sensing range of 8mm
These suffixes define the exact type of FOK959S-M within a product family.
Conclusion
The type of FOK959S-M is best classified as a compact, cylindrical inductive proximity sensor designed for metal detection in industrial and automation contexts. With variations in output logic, sensing distance, and environmental rating, it is a highly versatile and dependable component. Understanding these types enables better integration into control systems and process automation.
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FAQs About Type of FOK959S-M
The FOK959S-M is an inductive proximity sensor, mainly used to detect metallic objects without physical contact.
NPN (sinking) sensors output a connection to ground, while PNP (sourcing) sensors output to the power supply. The wiring and controller compatibility determine your choice.
Yes, most variants have an IP67 rating, making them suitable for environments with dust and moisture.
Absolutely. If the voltage levels match (usually 12–24V), you can use a resistor-divider or optocoupler to integrate with Arduino or similar microcontrollers.
The type of FOK959S-M sensor is ideal for factory automation, robotic arms, conveyor systems, metal object counting, and position detection.