The specific gravity of the general magnetic float is less than 0.5, and it can float on the liquid surface and move up and down along the measuring tube. The measuring element is installed in the tube, which can convert the measured liquid level signal into a resistance signal proportional to the liquid level change under the action of external magnetism, and convert the electronic unit into 4-20mA or other standard signal output. The transmitter is a modular circuit with the advantages of acid resistance, moisture resistance, shock resistance, and corrosion resistance. The circuit contains a constant current feedback circuit and an internal protection circuit, which can make the maximum output current not exceed 28mA, so it can reliably protect the power supply and prevent the secondary instrument from being damaged.

  The float type liquid level transmitter is a float that replaces the magnetic float ball. It is designed based on the Archimedes buoyancy principle. The float type liquid level transmitter uses tiny metal film strain sensing technology to measure the liquid level, interface or density. It can perform regular setting operations by pressing buttons on site during operation.

  The transmitter works on the principle of measuring liquid static pressure. It generally uses a silicon pressure sensor to convert the measured pressure into an electrical signal, which is then amplified by an amplifier circuit and compensated by a compensation circuit, and finally output in the form of 4-20mA or 0-10mA current.

  Capacitive level transmitters are suitable for industrial enterprises to measure and control the production process during the production process. They are mainly used for long-distance continuous measurement and indication of liquid level of conductive and non-conductive media or powdery and granular solid material level.

  The capacitive level transmitter is composed of a capacitive sensor and an electronic module circuit. It is based on a two-wire 4-20mA constant current output. After conversion, it can be output in a three-wire or four-wire mode, and the output signal is formed into a standard signal such as 1-5V, 0-5V, 0-10mA, etc. The capacitive sensor consists of an insulated electrode and a cylindrical metal container containing a measuring medium. When the material level rises, the capacitance changes with the change of the material height because the dielectric constant of the non-conductive material is significantly smaller than the dielectric constant of the air. The module circuit of the transmitter is composed of a reference source, pulse width modulation, conversion, constant current amplification, feedback and current limiting units. The advantages of using the pulse width modulation principle for measurement are low frequency, no RF interference to the surrounding elements, good stability, good linearity, no obvious temperature drift, etc.