Is the camera used to detect pinholes on Taobao a detector really useful?

Pinhole camera detector has a certain effect, but it can't be detected if it is hidden deep.

At present, there are two kinds of anti-sneak shots detectors, one is to detect red light and the other is infrared detector. There is also an anti-sneak shot device, which uses a signal detector to detect the frequency. Some miniature camera are equipped with radio frequencies.

Infrared detectors use physical reactions. A kind of led visible red light in the hand illuminates the suspicious place, and the led visible red light hits the surface of the pinhole camera and then reflects back. Because pinhole cameras are mostly blue film lenses, it is easy to appear red spots on the wall. This test has some disadvantages. Once the pinhole camera is hidden, it is difficult for infrared detectors to find it.

This infrared detector is only convenient for you to find the hidden shallow pinhole camera. You need to stick the lens of the pinhole camera on the wall and look carefully to find it. If a lens is hidden deep, plugged in or hidden in electrical equipment, infrared detectors cannot find it. "

When the frequency discriminator detects a similar frequency, it will give a reminder. However, this kind of camera also has defects, that is, not all micro-cameras have the same frequency. If the range of wireless frequency sneak shots is not completely included, it may not be detected, and even nearby devices with the same frequency will be disturbed.

This kind of detector can only find the wireless camera, and the signal detector works by microwave, and can only find the lens with image transmission function, that is, the wireless camera with microwave emission. However, once the hotel has placed a self-recording camera or a wired camera with a memory card, the signal detector cannot scan it.

Both infrared detectors and signal detectors can only find the same type of cameras. Because there are many ways of secret recording, some are transmitted by pictures, some are stored locally, and some are stored by wire. The transmission mechanism of each camera is different, so there is no situation that all pinhole cameras can be found by buying one detector.