Packaging industry: 
1. At the inlet of packaging machinery, detect whether objects are present/in place.
By installing diffuse reflection PF21B or (or directed PF21T) at the feed inlet, the light beam is reflected when an object passes by, triggering a photoelectric output response.

2.In the back of the filling machine, after completing the filling, it is necessary to seal the bottle and check whether the bottle cap is installed properly
By adjusting the installation height of the diffuse reflection PF21B or (or opposite reflection PF21T) on the conveyor line, the beam can just fall on the bottle cap. When the bottle cap passes by, the beam is reflected, triggering a photoelectric output response

3.To ensure the correct packaging of products, it is necessary to identify them by reading the one-dimensional/two-dimensional code markings on the packaging box. It needs to be triggered correctly when reading.

Install diffuse reflection PF21B or (or targeted PF21T) on the conveyor line, and when the packaging box passes by, the reflected beam triggers a photoelectric output response, which is provided to the code reader to open its code reading function.

Lithium battery industry
1.Check whether the battery is in place in modules and PACK lines
Install mirror reflective PF21R and reflective plate at both ends of the conveyor line. When the battery passes by, it blocks the beam and triggers the photoelectric output response.

2.In the production line of chemical separation, check whether the battery cells are in place
Install diffuse reflection PF21B or mirror reflection PF21R on the conveyor line, and when the battery cell passes by, it blocks the beam and triggers the photoelectric output response.

Electronics industry
1. PCB board in place inspection
Using a counter fired laser PF21T, it is installed at both ends of the conveying equipment, identifying the edge of the PCB board, blocking the optical path, and outputting a signal.

2. In PCB equipment, detecting the edges of PCB boards for counting
Using a diffuse reflection laser type PF21B, it is installed at the front end of the robotic arm, recognizes the edge of the PCB board, receives the return light, and outputs the signal.

3. Effective silicon wafer limit detection in FOUP
Using an opposing laser PF21T, it is installed at the upper and lower ends of the FOUP device. When the silicon wafer exceeds the limit position, the optical path is blocked and a signal is output