Mô tả kỹ thuật

Mô tả tổng quan về báo mức phao từ Mini Finetek FC/FD:

The reed switch relies on two basic scientific
principles namely: buoyancy and magnetism.
Buoyancy causes the float (which contains a
magnet) to rise with the liquid and magnetism
helps open and close the switch.
Since this product's this product has been
introduced to the market, it has seen significant
improvement and advances with regards to
convenience, safety and lowering costs.
The float switches are extremely compact, simple
and are easy to install on any small locations.
These switches are not affected by electrical
interference and can withstand chemicals, high
temperatures and pressures if the correct material
of float switch is selected

Nguyên lý làm việc của báo mức phao từ mini FC/FD Finetek:

Fig. 1 illustrates the pivot activation (FCH Type
reed switch). When float's magnet is moved close
to the switch's stationary stem, the float magnet
pushes the stem's switch circuit together and
closes the electrical circuit. When the float
magnet is moved away from the stem, the switch
circuit separates and the circuit is opened.

Fig. 2 illustrates perpendicular
activation (FC V TYPE float reed switches).
When the liquid level rises and pushes the float
up, the float’s ring magnet (sealed in the float)
moves close to the switch’s stationary stem.
The magnet pushes the circuit together and
when it makes contact, it closes the electrical
circuit. When the float magnet moves away from
the switch, the circuit contact is released and the
switch is opened.

Tính chất của báo mức phao từ mini Finetek FC/FD:

The switch's float should always have a specific
gravity (SG) less than the liquid that holds the
float.
(SG float < SG liquid)
When the liquid level rises the float will rise up
due to its buoyancy. The float's upward
movement will actuate the switch and close the
circuit.
Different float materials can be used to ensure
the float's SG level is less than the liquid.
(Water's SG level is 1 while gasoline SG levels
tend to be less than 1).
Because the float switches are activated by the
magnetic field inside the float, make sure the
liquid contains no iron traces or substances that
can induce magnetic interference.

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