capacitive transmitter

The capacitive transmitter is a high-precision intelligent instrument produced using advanced foreign technology. The main raw material components and parts are imported, and the whole machine has been strictly assembled and tested. It has the characteristics of advanced design principles, complete varieties and specifications, easy installation and use, specifications and dimensions that are fully compatible with the original ones and beautiful appearance. The products are divided into two types: intelligent and ordinary, which can meet the various selection requirements of users and have strong use value. Capacitive transmitters are widely used in petrochemical, metallurgy, electric power, food, paper, pharmaceutical machinery manufacturing and other industries.
Working principle of capacitive transmitter
This product is based on the principle of capacitive dust liquid level measurement, which forms a capacitor for the detection level and the conductive liquid. The metal core of the detection line is one pole of the capacitor and conducts electricity. The liquid is the other pole of the capacitor, and the middle is high-stability polytetrafluoroethylene. That is, the insulating outer layer of the detection wire serves as the medium between the two poles. As the liquid level changes, the area of the liquid surrounding the detection wire changes. Changes cause the relative areas of the two poles of the capacitor to change, resulting in changes in capacitance.
Technical indicators of capacitive transmitter
Measuring range
Accuracy level
Probing level temperature resistance +℃
Allowable container pressurebr/> The conductivity of the measuring medium is not less than / Amorphous conductive liquids such as acid and alkali water. Capacitive transmitter
The isolation type of the power supply is
Non-isolated two-wire, three-wire system when the operating current is output
Two-terminal isolated three-wire system Output Signal
Output protection
Measure the isolation withstand voltage between output power supplies
Span adjustment range and zero point shift
Transmitter body size
Capacitive transmitter product features
br/>Compact structure, small volume, simple installation and maintenance, and unified appearance and dimensions.
A variety of signal output forms to facilitate different system configurations.
PTFE grade, resistant to acid and alkali and other highly corrosive liquids and high temperatures.
The measurement part immersed in the liquid only has a PTFE soft wire or PTFE rod probe as the sensor, which is highly reliable.
Fully sealed aluminum alloy shell and stainless steel connectors.
For high-temperature pressure vessels, it is as simple as measuring normal temperature and pressure, and the measured value is not affected by the temperature specific gravity of the liquid being measured and the shape and pressure of the container.
The two ends of the measurement output and the three-terminal isolator of the measurement output power supply have various circuit structures and are equipped with isolators to adapt to different signal grounding methods.
Perfect over-current and over-voltage power supply polarity protection.
Application scope of capacitive transmitter
The measured medium has a corrosive effect on the sensitive components of the transmitter
It is necessary to isolate the high-temperature measured medium from the transmitter
In the measured medium There is solid suspended matter or high viscosity medium
The measured medium is led by the pressure tube and is easy to solidify or crystallize
The measuring head must be strictly purified when replacing the measured medium
The measuring head must be kept hygienic and contamination is strictly prohibited
Use corrosive or viscous liquids
Note that remote transmitters are not suitable for vacuum applications.