Classification of RF sensors

　　There are many classification methods for RF sensors, which can be classified according to the principle of action, overall size, protection characteristics, contact load, product use, etc.

　　1. Electromagnetic RF sensor

　　An RF sensor that produces a predetermined response from the relative motion of mechanical components under the action of current in the input circuit.

　　It includes DC electromagnetic RF sensor, AC electromagnetic RF sensor, magnetic holding RF sensor, polarization RF sensor, reed RF sensor, energy-saving power RF sensor.

　　(1) DC electromagnetic RF sensor: the control delay RF sensor in the input circuit, defines and classifies the electromagnetic RF sensor whose current is DC.

　　(2) AC electromagnetic RF sensor: The control current in the input circuit is AC electromagnetic RF sensor.

　　(3) Magnetic holding RF sensor: The magnetic steel is introduced into the magnetic loop, and after the RF sensor coil is powered off, the armature of the RF sensor can still maintain the state when the coil is powered on, with two stable states.

　　(4) Polarized RF sensor: The state change depends on the delay RF sensor, defined, classified in the input excitation polarity of a DC RF sensor.

　　(5) Reed RF sensor: The RF sensor that uses the action of the reed sealed in the tube with the dual function of the contact reed and the armature magnetic circuit to open, close or convert the line.

　　(6) Energy-saving power RF sensor: the control current in the input circuit is an AC electromagnetic RF sensor, but its current is large (generally 30-100A), small size, and power-saving function.

　　2. Solid state RF sensor

　　An RF sensor in which the input and output functions are performed by electronic components without mechanical moving parts.

　　3. Time RF sensor

　　When adding or removing the input signal, the output part needs to delay or limit the time to turn on or off the RF sensor of its controlled line.

　　4. Temperature RF sensor

　　RF sensor that operates when the external temperature reaches a specified value.

　　5. Wind speed RF sensor

　　When the speed of the wind reaches a certain value, the controlled circuit will be switched on or off.

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