1,任意设置启动压力值和关闭压力值;2,精确控制,不存在持续重复停启的弊端;3,表盘显示工作压力,便于用户观察;4,超长使用寿命,性能稳定;5,最低压力可调至零启动,控制更方便;6,不受压力范围限制,0-6KG,0-10KG ,0-50KG,0-500KG,或更高;7,不受应用环境限制,只要有压力的地方都可以使用;8,自带压力缓冲功能，无须压力罐;更多优势实际使用自能体会出。  This product is different from the conventional pressure switch：It’s    combined   electric  contact   pressure gauge combines   theadvantages of accurate readings, through photovoltaic technologycontrol the  installed  equipments  on-off  freely.     Product   designcomponents  including:  a  stable  and  reliable  electronic   circuits(Figure 1), high-performance electronic relays ,  sensitive   precisephotoelectric sensor, electric contact pressure gauge plate,   high-strength plastic sheet (or metal sheet).      To comparing with the traditional domestic and foreign products,we have the following advantages:1. Arbitrarily set to start and turn off the value of stress value.2. Precise control makes no problem in continued repetition on-off.3. Working    stress   shows   on   dial   makes    observation    moreconvenient.4. Long working life, stable performance.5. The minimum pressure can adjustable to zero pressure at start,control more convenient;6. Free from pressure limited ,0-0.6Mpa ,0-1Mpa,0-5Mpa ,0-50Mpa,or higher;7. Free from working condition limited  ,   it can work in any places there is pressure.8. Don’t need to install the pressure tank.