PR9376/010-011 Differential sensor

Description

PR9376/010-011

The head of the PR 9376 is a
differential sensor consisting of a
half bridge with two hall-effect sensor elements. By means of integrated operational amplifiers, the
Hall-voltage is amplified many times
over. Processing of the Hall-voltage
is carried out digitally in a DSP. In
this DSP the difference of the Hallvoltage is determined and compared with a reference value. The
result of this comparison is available
at a push-pull output which is shortcircuiting proof for a short time
(max. 20 s).
If a magnetically soft or steel trigger mark moves to the sensor in a
square angle (i.e. in lateral direction), the magnetic field of the sensor will be distorted which effects
the de-adjustment of the Hall-level
and switching of the output signal.
The output signal remains high or
low until the leading edge of the
trigger mark causes an inverted detuning of the half bridge. The output
signal is a steep sloped voltage
pulse.
For this reason the capacitive coupling of electronic devices is possible, even at low trigger frequencies.
High sophisticated electronic,
hermetically closed encapsulated in
a housing of rugged, stainless steel
and a connection cable with Teflon
isolation – if required with metal
protection tube – ensure the safe
and proper operation even under
harsh, industrial environments.

PR9376010-011