Industrial VRS Magnetic Speed Sensors DESCRIPTION The output signal of a VRS sensor is an ac voltage that varies High Resolution VRS sensors are designed for use in in amplitude and wave frequency as the speed of the applications where precise timing pulse is required, and/or fine monitored device changes, and is usually expressed in peak to pitch gears are used. Proper alignment of the sensor is peak voltage (Vp-p). required. One complete waveform (cycle) occurs as each target passes Passive VRS (Variable Reluctance Speed) Magnetic Speed the sensors pole piece. If a standard gear were used as a sensors are simple, rugged devices that do not require an target, this output signal would resemble a sine wave if viewed external voltage source for operation. on an oscilloscope. A permanent magnet in the sensor establishes a fixed Honeywell also offers VRS sensors for general purpose, high magnetic field. The approach and passing of a ferrous metal output, power output, high temperature and hazardous location target near the sensors pole piece (sensing area) changes the applications, as well as low-cost molded versions. 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. FEATURES POTENTIAL APPLICATIONS Self-powered operation Engine RPM (revolutions per minute) measurement on Direct conversion of actuator speed to output frequency aircraft, automobiles, boats, buses, trucks and rail Simple installation vehicles No moving parts Motor RPM measurement on drills, grinders, lathes and Designed for use over a wide range of speeds automatic screw machines Adaptable to a wide variety of configurations Motor RPM measurement on precision camera, tape Customized VRS products for unique speed sensing recording and motion picture equipment applications Process speed measurement on food, textile, paper, Housing diameters:, 5/8 in (M16) 3/8 in (M12) woodworking, printing, tobacco and pharmaceutical Housing material/style: stainless steel threaded industry machinery Terminations: MS3106 connector, preleaded Motor speed measurement of electrical generating Output voltages: 17 Vp-p to 170 Vp-p equipment Speed measurement of pumps, blowers, mixers, exhaust and ventilating fans Flow measurement on turbine meters Wheel-slip measurement on autos and locomotives Gear speed measurement High Resolution 5/8 INCH (M16*) SENSORS (All dimensions for reference only. mm/ in ) *Contact Honeywell for availability of metric mounting thread versions. General Specifications Test Condition Specifications Parameter Characteristic Parameter Characteristic Parameter Characteristic Min. output voltage 34 Vp-p Inductance 25 mH max. Surface speed 25 m/s 1000 in/s Coil resistance 45 Ohm to 85 Ohm Gear pitch range 36 DP (module 0.7) Gear 8 DP or coarser (module 3.17) Chisel pole piece 2,54 mm 0.010 in Optimum actuator N/A Air gap 0,127 mm width 0.005 in Min. surface 0,50 m/s 20 in/s typ. Max. operating 50 kHz typ. Load 1.25 kOhm speed frequency resistance Operating temp. -55 C to 120 C Vibration Mil-Std 202F range -67 F to 250 F Method 204D Mounting thread 5/8-18 UNF-2A Termination MS3106 connector Catalog Weight 29,87 28,12 19,05 1.176 1.107 0.750 0,76 Listing 0.030 3009AN 70 g 2.5 oz B A 19.05 0.750 - + General Specifications Test Condition Specifications Parameter Characteristic Parameter Characteristic Parameter Characteristic Min. output voltage 170 Vp-p Inductance 450 mH max. Surface speed 25 m/s 1000 in/s Coil resistance 910 Ohm to 1200 Ohm Gear pitch range 36 DP (module 0.7) Gear 8 DP or coarser (module 3.17) Chisel pole piece 2,54 mm 0.010 in Optimum actuator N/A Air gap 0,127 mm width 0.005 in Min. surface 0,25 m/s 10 in/s typ. Max. operating 15 kHz typ. Load 1.25 kOhm speed frequency resistance Operating temp. -55 C to 120 C Vibration Mil-Std 202F range -67 F to 250 F Method 204D Mounting thread 5/8-18 UNF-2A Termination MS3106 connector Catalog Weight 28,12 29,87 19,05 1.176 1.107 0.750 0,76 Listing 0.030 3029AN 70 g 2.5 oz B A 19.05 0.750 - + 2 sensing.honeywell.com