壓力開關的選型指南
來源：http://m.xintli.net/ 日期：2023-02-07
在實際應用中，壽命、可調查范圍和靈敏度是選擇一個佳壓力或溫度開關的關鍵。開關工作時間或循環(huán)動作次數(shù)及壽命是很重要的，振動、沖擊、過程溫度和超壓都會降低傳感器的壽命。除非有說明時真空啟動不影響傳感器的功能，高的電壓會減小微動開關的壽命。沖擊、振動等苛刻的環(huán)境條件也會影響壓力開關的壽命。
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.
靈敏度是指能夠能引起控制響應的輸入小變化值，對于壓力控制是指壓力傳感器能檢測的小壓力變化。所謂死區(qū)，就是指開關動作和復位的差值。溫度控制的靈敏度關鍵的是響應速度。溫度開關的死區(qū)受很多因素的影響（熱平衡、傳感器安裝位置、溫度梯度等）要視整個系統(tǒng)情況而定。
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.
選擇系列
Select Series
川消廠家認為根據(jù)開關輸出、殼體、可調范圍及參考刻度選擇系列。不同數(shù)字、符號代表不同的傳感器類型、開關輸出、可調范圍和參考刻度，這些參數(shù)的組合決定了壓力開關的型號和系列。
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.
壓力開關J=不帶參考刻度的壓力開關K=差壓H=帶參考刻度的壓力開關A=兩個開關DPDT輸出D=寬幅可調死區(qū)
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
溫度B=帶參考刻度的直插式感溫組件C=不帶參考刻度的直插式感溫組件E=帶參考刻度的溫包和毛細管式感溫組件F=不帶參考刻度的溫包和毛細管式感溫組件
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
選擇型號（根據(jù)可調范圍，死區(qū)和耐壓選擇型號）在開始選擇型號之前，需要選確定哪一種產(chǎn)品系列中的型號適合。典型的系列有防爆型、耐壓型及普通型。系列產(chǎn)品的型號確定了傳感器類型（如波紋管，膜片或活塞等）和特殊的功能特點（如量程和死區(qū)）。
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).
傳感器的選用決定了量程，靈敏度，精度，壽命和。壓力開關采用的是波紋管、金屬彈性體膜片及活塞，而溫度開關所采用的感溫元件是充液式毛細管溫包，每個系列都有多種不同的壓力或溫度范圍的產(chǎn)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.
選擇量程時，設定點要選在量程中間或接近中間的部分。選擇一個正確壓力開關型號，要確定其耐壓，超過量程壓力的值，超過耐壓額定值的沖擊會性損傷傳感器并導致設定點重復性漂移。更高的壓力會造成傳感器破壞，安裝壓力阻尼器或保護器來防止過壓沖擊。
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.
此外要定期檢查智能壓力開關內部的壓力傳感器和其他敏感元件，查看有無破損或者老化現(xiàn)象，并檢測其使用性能是否依舊良好。更多相關內容就來我們網(wǎng)站
http://m.xintli.net咨詢吧！
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://m.xintli.net Ask!
