Capacitive level gauge  

Capacitive liquid level measurement principle for the polar and conductive liquid a capacitor, the ground metal for the capacitance of the inner core of polar, another very conductive liquid for capacitance, the stability of middle to high PPR or polyvinyl fluoride, is out of line insulators outer as the medium between the two level, as the change of liquid level, liquid surrounded the polar area change,  The relative area of the two poles of the capacitor changes, leading to the change of capacitance. According to the formula of concentric tubular capacitance, the relationship between liquid height and capacitance can be written:  

The capacitance of a capacitor is affected by three factors:  

① The distance between each electrode surface  

② The size of each electrode surface  

The dielectric constant of the medium between the electrode surfaces  

Because Co, ε and D/ D are fixed, so: C=KH, that is, the capacitance is only proportional to the height of the liquid immersion probe (the relative area of the capacitance plate). 

Product features

     ■Capacitive level meter fundamentally solves the influence of temperature, humidity, pressure, material conductivity and other factors on the measurement process, so it has high anti-interference and reliability.  Capable of measuring highly corrosive liquids, such as acid, alkali, salt, sewage, etc.  Can measure high temperature, high pressure medium;  Process temperature -40~600℃;  Process pressure -0.1~ 4.0mpa Individual intelligent integrated capacitor level meter has a unique two-point field calibration technology for users to easily use the product to provide convenience.  Its probe and transmitter are divided into two parts, the length of the shielded cable connecting the two can reach 1 km, can be installed in the extremely harsh environment of the site, especially suitable for high temperature, vibration, corrosion, danger and the need for remote Settings and other occasions.  Pass the level change to the field indicator to indicate the actual level.  And equipped with liquid level alarm and liquid level remote transmission device.  The liquid level alarm can realize the upper and lower limit level control, limit alarm and accident interlock.  The liquid remote transmission device can linearly convert the liquid level change into dc 4~20mADC current signal to realize the remote liquid level indication and control record.  The level meter has the performance of flameproof and intrinsic safety protection.  The machine is made of wear-resistant material.  Therefore, it has corrosion resistance function.  

Product parameters

Product application

Suitable for high temperature, high pressure, strong corrosion, easy to crystallize, prevent clogging, freezing and solid powder, granular materials.  It can measure the liquid level of the strong corrosive medium, the liquid level of the high temperature medium, the liquid level of the sealed container, and the viscosity of the medium, density, working pressure is independent.