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Home> Products > Speed and Direction - Variable Reluctance Speed Sensors > Power
Output > Product Page
3040A
Power Output VRS Sensor, 15,9 mm
[0.625 in] M16 diameter, 70 Vp -p, -55 ºC
to 120 ºC [-67 ºF to 250 ºF], 12 DP
(module 2.11) or coarser, 40 kHz, 64
mm [2.50 in] approx. length
Actual product appearance may vary.
Features
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Self-powered operation
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Direct conversion of actuator speed to
output frequency
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Simple installation
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No moving parts
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Designed for use over a wide range of
speeds
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Adaptable to a wide variety of
configurations
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Customized VRS products for unique
speed sensing applications
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Housing diameter: 5/8 in (M16)
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Housing material/style: stainless steel
threaded
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Terminations: MS3106 connector,
preleaded
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Output voltage: 70 Vp-p
Potential Applications
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Engine RPM (revolutions per minute)
measurement on aircraft, automobiles,
boats, buses, trucks and rail vehicles
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Motor RPM measurement on drills,
grinders, lathes and automatic screw
machines
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Motor RPM measurement on precision
camera, tape recording and motion
picture equipment
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Process speed measurement on food,
textile, paper, woodworking, printing,
tobacco and pharmaceutical industry
machinery
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Motor speed measurement of electrical
generating equipment
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Speed measurement of pumps,
blowers, mixers, exhaust and
ventilating fans
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Flow measurement on turbine meters
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Wheel-slip measurement on autos and
locomotives
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Gear speed measurement
Power Output VRS sensors are designed for driving low resistance
loads at large air gaps in applications where larger actuators may be
used. Passive VRS (Variable Reluctance Speed) Magnetic Speed
sensors are simple, rugged devices that do not require an external
voltage source for operation. 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 lines 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. 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). 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. Honeywell also
offers VRS sensors for general purpose, high output, high resolution,
high temperature and hazardous location applications, as well as low-
cost molded versions.
Supporting Documentation
None Available
Product Specifications
Diameter 15,9 mm [0.625 in]
Available Metric Thread M16
Test Condition Specifications Surface Speed = 25 m/s [1000
in/s], Gear = 8 DP [module 3.17),
Air Gap = 0.127 mm [0.005 in],
Load Resistance = 1.25 kOhm
Min. Output Voltage (Peak to
Peak) 70 Vp -p
Pole Piece Shape and Size Round; 4,75 mm [0.187 in]
diameter
Typ. Operating Temperature
Range -55 ºC to 120 ºC [ -67 ºF to 250
ºF]
Gear Pitch Range 12 DP (module 2.11) or coarser
Typ. Operating Frequency 40 kHz
Max. Inductance 85 mH
Coil Resistance 120 Ohm to 162 Ohm
Min. Surface Speed 0,38 m/s [15 in/s]
Optimum Actuator 8 DP (module 3.17) ferrous metal
gear
Mounting Thread 5/8 -18 UNF -2A
Vibration Mil -Std 202F, Method 204D
Material Stainless steel threaded
Approximate Housing Length 64 mm [2.50 in]
Termination MS3106 Connector
Weight 70 g [2.5 oz]
Series Name Power Output
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