液位传感器运用十分广泛，特别是在制药行业的运用尤为重要。液位检测和监控在医药行业的生成中扮演着重要的角色，液位监控直接影响到产品的质量，甚至关系到生产过程能否顺利进行。同时，液位检测设备作为重要的计量器具，是生产过程中安全的重要保证要素之一。合格的液位检测设备、过硬的液位检测技术，不仅为制药企业的原料辅佐、半成品和成品质量保驾起航。因此为了保证产品质量的一致，只有科学地选择液位检测技术，才能保证检测结果的可靠性，稳定性。
液位计就是测量罐体或箱体里液位的高度,显示里面的液位的高度,液位的用途非常广泛,液位有包括液位信号器和连续液位测量两种。液位信号器是对几个固定位置的液位进行测量，用于液位的上、下限报警等。连续液位测量是对液位连续地进行测量，被广泛应用石油、化工、食品加工、制药行业等。
对于制药企业常用的几种液位检测技术主要采用压力法、浮力法、电学法、超声波法、雷达法音叉振动法等等，然而在制药企业中，合成生产及污水处理中使用的强酸、强碱原料均为强腐蚀性物体，其储罐及水槽的液位检测应该选用非接触式液位计。目前随着制药过程自动化的实现，部分制药厂家使用光电液位传感器来控制液位。依据光电液位传感器利用液体导电的性能来监测液位高低。液位一旦触及对应的极棒便产生开关信号，信号经处理后用于控制液位。其实液位开关结构简单，可测量不同液位，适用于不要求连续显示具体液位的场合。
Liquid level sensors are widely used, especially in the pharmaceutical industry. Liquid level detection and monitoring plays an important role in the generation of the pharmaceutical industry. Liquid level monitoring has a direct impact on the quality of products, and even related to the smooth progress of the production process. At the same time, as an important measuring instrument, liquid level detection equipment is one of the important factors to ensure the safety in the production process. Qualified liquid level detection equipment, excellent liquid level detection technology, not only for pharmaceutical enterprises to assist raw materials, semi-finished products and quality assurance set sail. Therefore, in order to ensure the consistency of product quality, only the scientific selection of liquid level detection technology can ensure the reliability and stability of the test results.
The liquid level meter is to measure the height of the liquid level in the tank or the tank, showing the height of the liquid level inside. The liquid level has a wide range of uses, including the liquid level signal and continuous liquid level measurement. The liquid level signal is used to measure the liquid level in several fixed positions and alarm the upper and lower limits of the liquid level. Continuous liquid level measurement is a continuous measurement of liquid level, which is widely used in petroleum, chemical industry, food processing, pharmaceutical industry and so on.
Pressure method, buoyancy method, electrical method, ultrasonic method, radar tuning fork vibration method and so on are mainly used for several liquid level detection techniques in pharmaceutical enterprises. However, in pharmaceutical enterprises, the strong acid and alkali raw materials used in synthetic production and sewage treatment are strongly corrosive objects, and the liquid level detection of tanks and tanks should be carried out. The non-contact liquid level gauge is selected. At present, with the realization of pharmaceutical process automation, some pharmaceutical manufacturers use photoelectric liquid level sensor to control the liquid level. According to the photoelectric liquid level sensor, the liquid level is monitored by the performance of liquid conduction. Once the liquid level reaches the corresponding pole, a switch signal is generated, and the signal is processed to control the liquid level. In fact, the liquid level switch has simple structure and can be used to measure different liquid levels. It is suitable for occasions where the specific liquid level is not required to be displayed continuously.
