Hand series <br> <br> hand siren small size, light weight, easy to carry, easy to install. No tools are needed. Only 0.15 square meters of dough and people standing can be normal operation, liquidity operations are very strong.
Civil defense,*, detention centers, prisons, mines, airports, pastures, oil depots, warehouses, hotels, hotels and other business units use an ideal alarm device in the event of a critical situation in critical locations.
The use of hand-cranked siren <br> <br> used for emergency warning, easy to carry its products mainly used for flood control, disaster, forest fire, * military supplies, public and industrial applications to respond to emergencies alarm use.
Traditional alarm principle <br> <br> traditional alarm principle is the use of vibration sensor, once the sensor signal received shock will alarm. In this way, thunder and rain, or cat and dog touch, and even other vehicles parked together, may cause alarm response.
The principle hand alarm siren <br> <br> hand crank is manually rotated, via the transmission gearbox gradual acceleration, and then driven through the drive block Ming wheel speed operation. In the process of high-speed operation, the sounding wheel generates high-speed and high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high pressure
Because it is a hand-cranked alarm, the primary speed of the hand determines the sound effect of the alarm. Speed ​​and sound effects are proportional to each other. Relatively speaking, the higher the speed, the louder the sound. There is a difference between people shaking the alarm. The height of people, the size of their strength, and the speed of shaking are all direct factors that affect the sound effect of the siren. Therefore, we have made macro regulations here. The initial speed of shaking should not be less than 90 r/min. Sound effects.
Reflective warning`s reflection part of the garments is the use of lattice micro-rhombus type refraction and high refractive index of glass beads back to the principle of reflection, through the post-processing of advanced processing technology made. It can reflect the distant light back to the light. Both in the day or night have a good retroreflective optical performance. Especially at night, it can play the same high visibility as the day. The use of this high-energy reflective material made of safety clothing, whether the wearer is in the distance, or in the light or scattered light interference, it can be relatively easy to be found by the night driver.
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Daoming Optics & Chemical Co., Ltd , http://www.dmreflective.com