Slotted Opto Sensor

Slotted opto sensor is a type of opposed photoelectric sensor, also known as slot/U-shaped photoelectric switch, which integrates emission and reception. The slot width is the detection distance of the product. But when the detected object passes through the slot, the light is blocked, and the photoelectric switch acts, outputting a switch control signal to cut off or connect the load current, thus completing a control action. The micro photoelectric groove type sensor series has a small size, diverse specifications, significant space savings, convenient installation, long service life, high-speed response, strong sunlight interference resistance, power interference resistance, and perfect combination of speed and price. It is widely used for various automation equipment and production processes for functions such as limit, identification, positioning and in place detection.

• How wide the groove should be;
• Resolution (slit width);
• Fixed method

1. Slot width. To detect objects, it is necessary to pass through the slot of the slot type opto coupler to block infrared light. Therefore, the slot width of the photoelectric sensor should be wider than the detected object and have a certain margin for easy installation.
2. The resolution of slot type sensor, if the detected object is a toothed disc, the width of the toothed disc teeth is d, and the width of the toothed disc teeth groove is
3. The slit width of the slot type sensor switch should be less than d and less than f, in order to ensure effective blocking and conduction of infrared light. Under the above conditions, choose a slot photoelectric sensor with a larger slit width.
4. There are two types of slot photoelectric switch: with fixed holes and without fixed holes, depending on the actual situation.
5. Installation location. When installing the sensor, the outer diameter of the detection gear should exceed the groove type sensor optical axis by 1-2mm. This can effectively block the light.

Q: What is the operating voltage of the miniature Slotted Opto Sensor?

Miniature recessed photoelectric sensors primarily operate on DC voltage, with common specifications as follows:
General Purpose Type: DC 5V is the most mainstream voltage, widely used in precision equipment, 3C automation, encoders, and other applications.
Industrial Wide Voltage Type: Supports DC 12V～24V, compatible with standard PLC industrial control systems, offering stronger anti-interference and compatibility.
Some wide-temperature industrial models cover a wide voltage range of DC 5V～24V, eliminating the need for additional voltage regulation and providing greater flexibility in installation and use.

Q: What is the detection accuracy of a miniature Slot Sensor?

The detection accuracy of a miniature groove-type photoelectric sensor is primarily determined by its structure, with the following key indicators: Repeatability: Typically 0.01mm, with some precision models reaching the micrometer level. Position resolution: Affected by the groove width and spot size, generally between 0.05 and 0.1mm. Due to its through-beam narrow-beam design, it eliminates mechanical hysteresis and jitter, making it ideal for high-precision applications such as precision positioning, origin finding, and high-speed indexing.

Q: Can you provide samples for testing of the miniature Slotted Opto Sensor? How much does the sample cost?

Samples can be provided for installation testing. Some standard models offer free samples, but this needs to be confirmed based on the model and quantity requested. Sample costs can usually be deducted after a bulk order is placed. For detailed policies, please consult your sales representative.

Q: What are the lead time and minimum order quantity (MOQ) for the Slotted Sensor?

Standard models are in stock, with a lead time of 1-3 business days. Customized or special specifications have a lead time of approximately 1-2 weeks.

The MOQ for standard products is low, and small-batch trial production is supported. Larger batches receive more favorable pricing.

Q: Can your slotted opto sensor work stably near welding machines and frequency converters with strong electromagnetic interference?

A: All Garantta U-slot photoelectric switches adopt infrared 968nm narrow beam optical design and built-in anti-interference circuit. If you separate sensor cables from high-current welding lines by more than 30cm and use single-end grounded shield wire, false triggering caused by inverter EMI or welding arc light can be completely avoided. Our slot sensors support 10000LUX strong light resistance, and IP50 dust-proof structure works reliably in workshop cutting oil and dust environment, with -25℃~70℃ wide temperature range suitable for metal processing assembly lines.

Q: What's the difference between K45, L45, R45, T45, Y45 slotted opto sensor? How to choose the right housing for my equipment?

A: All models share 5mm fixed slot width and same electrical parameters (NPN/PNP dual output, ≥1KHz response frequency), only differ in mounting hole layout and outline shape:

L45: Long straight body with side mounting holes, ideal narrow vertical installation for 3C automation equipment;

K45/R45/T45: Square compact shell with top/bottom fixing holes, perfect for encoder gear speed detection;

Y45: Special bent housing for limited horizontal installation space. All series support 2m standard anti-bending wire, custom 5m/10m cable length is available on request.

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