12. Type of sensors
Sensors may be grouped into two broad categories, depending on whether they are
incorporated into valve body or not as shown in the table below.
13. How to position the equipment
The equipment incorporates a low-frequency antenna to transmit sensor data. An
arrow
on the top panel of the equipment shows where the tip of the antenna is
located. In order to properly energize the valve, the equipment must be aligned with
valve body as shown in the figure below. Anyway, the equipment must be placed
over the tire and tilted towards valve body.
Design 1
The valve shown in the figure is made up two elements:
- pressure sensor
- valve body
Valve body is made up of four elements: retaining screw, valve,
nut and valve cap.
Design 2
The valve shown in the figure is a single component that
incorporates both pressure sensor and tire valve. This valve
design also features a grommet/O-ring (to keep air from escaping
past the hole in the rim), a nut and the valve cap.
In design 1, valve and sensor may be replaced separately when
needed; in design 2, valve and sensor are replaced as a set.
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