The Motion Sensors (MSI) HD series of
sensors is based on Hall Effect sensor
technology, which can sense a change in
target motion from true zero to 20 KHz.
These sensors are dual channel versions of
our H
series or HM
series of sensors and
offer two channels of output.
HD sensors
based on the HM series require that the target be a
magnet, such as magnets embedded in gear teeth, blade
tips, or around a disc. They must be oriented to the
direction of the target movement and can be set to sense
both north and south oriented magnets or only north or
south respectively. Air gap distances can be as much as
0.200" to 0.250" away, depending on target shape and
magnetic field strength.
HD
sensors based on the H series incorporate a magnet
within the sensor, enabling them to sense ferrous metal
as well as magnet targets. Maximum air gap sensing
distances are typically 0.100" and these sensors can be
optimized to detect fine as well as large pitch targets.
As with sensors based upon the HM series, they must be
oriented to the direction of target movement to work
effectively. The output frequency of HD sensors has a
square pulse waveform (digital) that directly relates to
the number of turbine blades, gear teeth, etc. that have
been sensed. These pulses, in turn, can be correlated to
determine flow rate, RPM, or velocity.
Product
Specifications
HD series Hall Effect sensors are
manufactured on a custom basis to meet the
specifications and requirements of a particular
application. MSI can make
custom dual channel Hall Effect sensors in
customer-specified lengths, diameters, configurations,
mounting threads (e.g., metric) as well as with
different operating specifications and options like
pigtail leads, NPT threads for explosion proof
applications, etc. Please contact us and we would be
happy to make a product that meets your
specifications.
Features and
Specifications
Input
Power:
4.7 to 24 VDC regulated, 15 mA maximum @
no load
Reverse polarity
protected
Pulse Output
Options:
TTL/CMOS (Standard); fan-out
of 5 TTL/CMOS loads
Open collector; maximum OFF
state voltage 24VDC, maximum ON current 50 mA
Up to 0.250" dependent on
target geometry, magnet construction and sensor
construction (for those sensors based on the HM
series)
Up to 0.100" dependent on
target geometry, magnet construction and sensor
construction (for those based on the H
series)
Interconnection Options:
Pigtail with wires or cable
NPT threaded body with wire or cable
pigtail for explosion proof environments
Connector per customer
specifications
Physical Features:
Operating temperature: -40°C
to +105°C
NOTE: units that operate up
to +150°C are also available
Storage temperature: -40°C to
+150°C
Body material: 300 series
stainless steel
Encapsulation: epoxy potting
or hermetically sealed, welded
construction
Orientation:
Alignment of the sensor to target
rotation is required for optimal performance,
ensuring proper orientation of the hall effect
element to the magnetic
field
Approvals:
CE
compliant to EMC Directive 89/336/EEC for use in
residential, commercial, light industrial and
heavy industrial
environments
Warranty:
Unconditional one (1) year warranty if
used within specifications
