This M18 plastic photoelectric sensor uses a focused light beam to find objects without touching them. You can get it in different kinds: diffuse for general sensing, retro-reflective for longer distances with a mirror, and through-beam for the longest, most reliable sensing using separate light sender and receiver units. Features and Benefits
- Many Sensing Types - Pick the right M18 photoelectric sensor for your job. Options include a diffuse reflection sensor with adjustable sensitivity or a through-beam sensor with a 5m sensing distance.
- NPN Output Choices - It comes with NPN Normally Open (NO) or Normally Closed (NC) outputs. These connect easily with common control systems.
- IP65 Rated Case - The M18 plastic optical sensor body keeps out dust and low-pressure water jets. It works in many factory settings.
- Light Plastic Body - The M18 round plastic sensor body doesn't rust and costs less. It's a good choice for general automation. Applications
- Conveyor Line Control: Finds products, boxes, or containers on a conveyor. It can count items or manage sorting gates.
- Packaging Machines: Senses bottles, labels, or flaps to make sure the machine works in the right order.
- Access Monitoring: Use a through-beam M18 plastic photoelectric sensor to watch a doorway or opening for safety or security.
How They Work
A photoelectric sensor, also known as an optical or light sensor, uses a beam of light to detect the presence or absence of an object. This M18 Diffuse Reflective sensor emits a light beam which, if reflected back by an object within its 30cm adjustable range, triggers a proximity switch output. The sensor detects objects without physical contact, making it suitable for delicate or fast-moving items. The plastic body ensures durability in various industrial environments, with the integrated connector simplifying installation.
3 Main Types of Photoelectric Sensors
Photoelectric sensors come in three primary types: Diffuse, Reflector, and Through-Beam. This particular sensor supports all three detection types. Diffuse sensors, like this M18 unit, detect objects by sensing reflected light from the target itself. Reflector types use a separate reflector to bounce the light back to the sensor. Through-Beam sensors have a separate emitter and receiver, with detection occurring when an object breaks the light beam between them.
Common Applications
Photoelectric sensors are widely used in industrial automation for tasks such as object detection, counting, and positioning. Their ability to detect objects within a 30cm adjustable range makes them versatile. For example, they can be used to confirm product presence on a conveyor belt, monitor fill levels in hoppers, or ensure correct component placement. The proximity switch output can then trigger other machinery or alarms, improving efficiency and safety in various production lines.
The Core Components
The core components of this M18 photoelectric sensor include the light emitter, the receiver, and the integrated connector. The emitter generates the light beam, while the receiver detects the reflected light. The plastic body protects these internal components, ensuring reliable operation. Its M18 housing diameter indicates its standard size for mounting. The sensor operates with a voltage below 50Vac or 75Vdc, making it suitable for low-voltage control systems.
The 3 Main Operating Modes
This photoelectric sensor offers three main operating modes: Diffuse, Reflector, and Through-Beam, aligning with its detection types. In Diffuse mode, the sensor emits light and detects reflections directly from the target object within its 30cm adjustable range. Reflector mode requires a separate reflector to bounce the light back to the sensor. Through-Beam mode uses a separate emitter and receiver, with the sensor detecting an object when it interrupts the light beam passing between them.
Body Material: Plastic. Voltage: Below 50Vac or 75Vdc. Connector Type: Integrated Connector. Detection Type: Diffuse, Reflector, Through-Beam. Housing Diameter: M18. Output Type: Proximity Switch. Sensor Type: Photoelectric. Housing Diameter: M18. Housing Material: Plastic. Operating Voltage Range: 10-30V DC (typical). Max Output Current: 200 mA. Output Configuration: NPN, PNP (typical). Sensing Range (Diffuse): 5 cm to 100 cm (adjustable, typical). Sensing Range (Reflector): 0.1 m to 5 m (with reflector, typical). Sensing Range (Through-Beam): 0.1 m to 15 m (typical). Operating Temperature: -25°C to +60°C. Protection Rating: IP67. Connection Type: Integrated cable or M12 connector. Light Source: Infrared LED or Red LED. Product Type: Photoelectric Sensor. Response Time: < 1 ms. Sensing Principle: Diffuse, Reflector (Retro-reflective), Through-Beam. Q: What are the sensing ranges for the diffuse and through-beam models? A: The diffuse-reflective model can be adjusted to detect objects up to 30 cm away. The through-beam version has a much longer range, working at distances up to 5 meters between its emitter and receiver units.. Q: How well does the plastic body hold up against dust and water? A: The sensor has an IP65 rating, meaning its PBT plastic housing is completely sealed against dust. It can also withstand low-pressure water jets from any direction, making it suitable for many factory floor conditions.. Q: How does this photoelectric sensor connect to a control panel? A: This particular model features an M12 connector at its base instead of a fixed pigtail cable. This lets you use a separate cable of whatever length you need and makes replacing the sensor faster.. Q: Is the reflector included if I buy the retro-reflective type? A: Yes, when you order the retro-reflective model, the matching reflector is included in the box. You'll get both the sensor and the reflector needed for it to function.. Q: What kind of warranty do you provide on these optical sensors? A: We offer a one-year warranty that covers any functional failures or defects that aren't caused by misuse or physical damage. If your sensor has a problem within a year, we'll work with you to get it replaced..