Komatsu Galeo BR380JG-1E0 Shop Manual page 221

10 Structure, function and maintenance standard
Pump pressure sensor
1. Sensor
2. Connector
Function
The pump pressure sensor is installed to the
q
inlet circuit of the control valve. It converts the
pump discharge pressure into voltage and
sends it to the work equipment and pump con-
troller.
Operation
The oil pressure is applied to the diaphragm of
q
the oil pressure sensor from the pressure
intake part, the diaphragm is deformed.
The deformation in the diaphragm causes the
q
resistance of the gauge to change. This causes
a change in the output voltage, which is trans-
mitted to the amplifier (voltage amplifier).
BR380JG-1E0
The relationship between the pressure applied
q
to sensors (P) and output voltage (E) is shown
in the figure below.
The amplifier magnifies output voltage (E) and
q
transmits it to the pump controller.
SEN01355-00
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