在实际应用中，寿命、可调查范围和灵敏度是选择一个佳压力或温度开关的关键。开关工作时间或循环动作次数及寿命是很重要的，振动、冲击、过程温度和超压都会降低传感器的寿命。除非有说明时真空启动不影响传感器的功能，高的电压会减小微动开关的寿命。冲击、振动等苛刻的环境条件也会影响压力开关的寿命。

In practical applications, life, investigable range and sensitivity are the keys to select a good pressure or temperature switch. The working time of the switch or the number of cycle actions and the service life are very important. Vibration, shock, process temperature and overpressure will reduce the service life of the sensor. Unless otherwise specified, vacuum starting will not affect the function of the sensor, and high voltage will reduce the life of the microswitch. Severe environmental conditions such as shock and vibration will also affect the service life of the pressure switch.

灵敏度是指能够能引起控制响应的输入小变化值，对于压力控制是指压力传感器能检测的小压力变化。所谓死区，就是指开关动作和复位的差值。温度控制的灵敏度关键的是响应速度。温度开关的死区受很多因素的影响（热平衡、传感器安装位置、温度梯度等）要视整个系统情况而定。

Sensitivity refers to the input small change value that can cause the control response. For pressure control, it refers to the small pressure change that can be detected by the pressure sensor. The so-called dead zone refers to the difference between switch action and reset. The key to the sensitivity of temperature control is the response speed. The dead zone of temperature switch is affected by many factors (heat balance, sensor installation position, temperature gradient, etc.), which depends on the whole system.

选择系列

Select Series

川消厂家认为根据开关输出、壳体、可调范围及参考刻度选择系列。不同数字、符号代表不同的传感器类型、开关输出、可调范围和参考刻度，这些参数的组合决定了压力开关的型号和系列。

Chuanxiao manufacturer believes that the series is selected according to the switch output, housing, adjustable range and reference scale. Different numbers and symbols represent different sensor types, switch outputs, adjustable ranges and reference scales. The combination of these parameters determines the model and series of pressure switches.

压力开关J=不带参考刻度的压力开关K=差压H=带参考刻度的压力开关A=两个开关DPDT输出D=宽幅可调死区

Pressure switch J=pressure switch without reference scale K=differential pressure H=pressure switch with reference scale A=two switches DPDT output D=wide adjustable dead band

温度B=带参考刻度的直插式感温组件C=不带参考刻度的直插式感温组件E=带参考刻度的温包和毛细管式感温组件F=不带参考刻度的温包和毛细管式感温组件

Temperature B=in-line temperature sensing component with reference scale C=in-line temperature sensing component without reference scale E=bulb with reference scale and capillary temperature sensing component F=bulb without reference scale and capillary temperature sensing component

选择型号（根据可调范围，死区和耐压选择型号）在开始选择型号之前，需要选确定哪一种产品系列中的型号适合。典型的系列有防爆型、耐压型及普通型。系列产品的型号确定了传感器类型（如波纹管，膜片或活塞等）和特殊的功能特点（如量程和死区）。

Select the model (select the model according to the adjustable range, dead band and withstand voltage). Before starting to select the model, you need to select and determine which model in the product series is suitable. Typical series include explosion-proof type, pressure-resistant type and ordinary type. The model of the series of products determines the sensor type (such as bellows, diaphragm or piston) and special functional characteristics (such as range and dead zone).

传感器的选用决定了量程，灵敏度，精度，寿命和。压力开关采用的是波纹管、金属弹性体膜片及活塞，而温度开关所采用的感温元件是充液式毛细管温包，每个系列都有多种不同的压力或温度范围的产品。

The selection of sensor determines the range, sensitivity, accuracy, life and price. The pressure switch uses bellows, metal elastomer diaphragm and piston, while the temperature sensor used by the temperature switch is a liquid-filled capillary thermometer. Each series has a variety of products with different pressure or temperature ranges.

选择量程时，设定点要选在量程中间或接近中间的部分。选择一个正确压力开关型号，要确定其耐压，超过量程压力的值，超过耐压额定值的冲击会性损伤传感器并导致设定点重复性漂移。更高的压力会造成传感器破坏，安装压力阻尼器或保护器来防止过压冲击。

When selecting the range, the set point should be in the middle or near the middle of the range. To select a correct pressure switch model, first determine its withstand voltage. The value of pressure exceeding the range pressure will permanently damage the sensor and cause repetitive drift of the set point. Higher pressure will cause sensor damage. Install pressure damper or protector to prevent overpressure impact.

此外要定期检查智能压力开关内部的压力传感器和其他敏感元件，查看有无破损或者老化现象，并检测其使用性能是否依旧良好。更多相关内容就来我们网站http://www.cx-fire.com咨询吧！

In addition, the pressure sensor and other sensitive elements inside the intelligent pressure switch should be checked regularly to see if there is any damage or aging, and to check whether its service performance is still good. Come to our website for more relevant content http://www.cx-fire.com Ask!