Hazardous Location
Industrial VRS Magnetic
Speed Sensors
DESCRIPTION
Hazardous Location VRS sensors are designed for use in
locations where explosion-proof or intrinsically safe sensors
are required.
The output signal of a VRS sensor is an ac voltage that varies
in amplitude and wave frequency as the speed of the
monitored device changes, and is usually expressed in peak to
peak voltage (Vp-p).
Passive VRS (Variable Reluctance Speed) Magnetic Speed
sensors are simple, rugged devices that do not require an
external voltage source for operation.
One complete waveform (cycle) occurs as each target passes
the sensor’s pole piece. If a standard gear were used as a
target, this output signal would resemble a sine wave if viewed
on an oscilloscope.
A permanent magnet in the sensor establishes a fixed
magnetic field. The approach and passing of a ferrous metal
target near the sensor’s pole piece (sensing area) changes the
flux of the magnetic field, dynamically changing its strength.
This change in magnetic field strength induces a current into a
coil winding which is attached to the output terminals.
Honeywell also offers VRS sensors for general purpose, high
output, power output, high resolution and high temperature, as
well as low-cost molded versions.
FEATURES
POTENTIAL APPLICATIONS
Self-powered operation
Direct conversion of actuator speed to output frequency
Simple installation
Engine RPM (revolutions per minute) measurement on
aircraft, automobiles, boats, buses, trucks and rail
vehicles
No moving parts
Motor RPM on oil and gas drilling equipment and
machinery
Motor RPM measurement on drills, grinders, lathes and
automatic screw machines
Process speed measurement on food, textile, paper,
woodworking, printing, tobacco and pharmaceutical
industry machinery
Motor speed measurement of electrical generating
equipment in grain elevators, sawmills and other
potentially explosive environments
Designed for use over a wide range of speeds
Adaptable to a wide variety of configurations
Customized VRS products for unique speed sensing
applications
Housing diameters: 3/4 in, 5/8 in
Housing material/style: stainless steel threaded
Terminations: MS3106 connector, preleaded
Output voltages: 30 Vp-p to 60 Vp-p
Speed measurement of pumps, blowers, mixers, exhaust
Gear speed measurement
HONEYWELL [ Honeywell ]
