1) The technique of ultrasonic detector is steady and its anti-jamining capability is strong.
2) UD's accurate rate is higher than loop sensor which has problem of weak magnetic and repeated detection. The base plate of UD is zoom type to avoid the problem causing by different setting angles without error accumulation.
3) UD has two detection methods: one is to detect the ground, the other is to detect the vehicles.Both of the types are available for tall kinds of car park terrain.
4) The instruction's process chip and memory chip of UD has the function of storing different setting values. (keep address setting and self-adapting setting and etc.) So it is unnecessary to reset after power down.