KJTDQ M100-RT/35/76a/115 Photoelectric Switch: The Ultimate Guide to Reliable Sensing

• time：2026-01-11 02:31:55
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In the world of industrial automation, precision and reliability are non-negotiable. The M100-RT/35/76a/115 photoelectric switch stands as a testament to this principle, offering a robust solution for countless detection and positioning tasks. This comprehensive guide delves into the features, applications, and benefits of this specific sensor model, explaining why it is a preferred choice for engineers and system integrators globally.

At its core, the M100-RT/35/76a/115 is a retro-reflective photoelectric sensor. This means it houses both a light emitter and a receiver in a single unit. It operates by emitting a beam of light towards a dedicated reflector. When an object interrupts this beam, the sensor detects the change in the received light and triggers a switching signal. The "RT" in its designation typically signifies this retro-reflective mode. The specific numerical codes like 35, 76a, and 115 often refer to critical technical specifications such as sensing range, light source type (likely a precise red or infrared LED for the 76a), housing material, and electrical connection type (like a 115mm cable or a specific connector variant). This precise coding allows for exact identification and application matching.

The construction of the M100 series is designed for harsh environments. It commonly features a sturdy housing rated at IP67, making it resistant to dust and temporary immersion in water. This durability ensures consistent operation in settings like packaging lines, material handling systems, and automotive assembly plants, where exposure to vibration, moisture, and debris is common. Its fixed cable or connector options, indicated by the "115" spec, provide secure and reliable electrical integration into control systems.

One of the key advantages of the retro-reflective design in the M100-RT/35/76a/115 is its simplified installation. Unlike through-beam sensors that require separate emitter and receiver units to be aligned on opposite sides, this model only requires mounting the single sensor body and positioning a reflector on the opposite side. This cuts installation time and cost significantly. The sensing range, implied by the "35" (often 3.5 meters or a similar value), is substantial for many applications, allowing for flexible mounting positions to detect objects of various sizes.

The applications for this photoelectric switch are vast. It is exceptionally effective for detecting transparent objects, such as glass or plastic bottles on a conveyor, because retro-reflective sensors with polarizing filters can reliably see through glare and reflections. It is also ideal for presence detection in automated storage and retrieval systems, palletizing stations, and door control mechanisms. The precise switching output ensures accurate counting, positioning, and process initiation, forming the sensory backbone of efficient production lines.

When selecting a sensor like the M100-RT/35/76a/115, several factors must be considered. The material and color of the target object, ambient light conditions, required response speed, and the electrical compatibility (e.g., NPN or PNP output, voltage rating) with the existing PLC or controller are all critical. Consulting the official technical data sheet for the exact specifications corresponding to the full model number is essential for optimal performance. Proper alignment with the reflector and regular lens cleaning are simple yet vital maintenance steps to prevent false triggers and ensure long-term, trouble-free service.

In summary, the M100-RT/35/76a/115 photoelectric switch represents a blend of proven technology and practical design. Its retro-reflective operation, environmental resilience, and clear model-specific specifications make it a dependable workhorse for industrial sensing. By providing a reliable electrical signal upon object detection, it plays a fundamental role in enhancing automation efficiency, safety, and productivity. For engineers seeking a versatile and durable solution for non-contact detection, this sensor model continues to be a relevant and trusted component in the automation toolkit.