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Capacitive touch screen works by the current induction of human body. Capacitive touch screen is a
four-layer composite glass screen. The inner surface and interlayer of the glass screen are coated
with a layer of ITO, respectively, and the outer layer is a thin layer of silica glass protective layer.
The interlayer ITO coating is used as the working face, four electrodes are led out from four corners,
and the inner layer ITO is the shielding layer to ensure a good working environment. When the
finger touches the metal layer, due to the electric field of the human body, a coupling capacitance is
formed between the user and the surface of the touch screen. For high-frequency current, the
capacitance is a direct conductor, so the finger absorbs a small current from the contact point. The
current flows out from the electrodes on the four corners of the touch screen, and the current flowing
through the four electrodes is proportional to the distance between the finger and the four corners.
The controller obtains the position of the touch point through the accurate calculation of the four
current ratios.
Picture 12
The touch screen display technology adopted by our company can reflect the working condition of
the instrument and equipment in real time, such as the effective working state of the filter.
9) Structure
a)
There are side windows on both sides of the biological safety cabinet to facilitate observation
of the experiment.
b)
The glass door can be used manually and electrically at the same time, and the glass door can
be pulled down to close the front window when the power is off.
c)
Microbiological Safety Cabinet’s both sides and back area are negative pressure air channel.
And the negative pressure keeps work area away from contamination.
d)
Cabinet body is built of 1.2mm cold-rolled steel with anti-powder coating. Strong and steady.
e)
Work area is fully made of 304 stainless steel which looks beautiful and with corrosion
resistance performance.
f)
Base stand is made of cold-rolled steel with anti-powder coating.
g)
Soft touch type control panel, easy to handle and beautiful appearance.