High Temperature Industrial VRS Magnetic Speed Sensors DESCRIPTION The output signal of a VRS sensor is an ac voltage that varies High Temperature VRS sensors are designed for use in in amplitude and wave frequency as the speed of the applications where the sensor is exposed to temperatures up monitored device changes, and is usually expressed in peak to to 260 C 450 F . Sealed Front-End versions are available for peak voltage (Vp-p). applications where the sensor is exposed to fluids, lubricants or adverse environmental conditions. One complete waveform (cycle) occurs as each target passes the sensors pole piece. If a standard gear were used as a Passive VRS (Variable Reluctance Speed) Magnetic Speed target, this output signal would resemble a sine wave if viewed sensors are simple, rugged devices that do not require an on an oscilloscope. external voltage source for operation. Honeywell also offers VRS sensors for general purpose, high A permanent magnet in the sensor establishes a fixed output, power output, high resolution and hazardous location magnetic field. The approach and passing of a ferrous metal applications, as well as low-cost molded OEM versions. target near the sensors 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. 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 1/4 in (8M) industry machinery Housing material/style: stainless steel threaded Motor speed measurement of electrical generating Terminations: MS3106 connector, preleaded equipment Output voltages: 4.7 Vp-p to 125 Vp-p 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 Temperature 5/8 INCH (M16*) SENSORS (All dimensions for reference only. mm/ in ) *Contact Honeywell for availability of metric mounting thread versions. LOW RESISTANCE COILS FOR HIGH FREQUENCY APPLICATIONS General Specifications Test Condition Specifications Parameter Characteristic Parameter Characteristic Parameter Characteristic Min. output voltage 25 Vp-p Inductance 30 mH max. Surface speed 25 m/s 1000 in/s Coil resistance 65 Ohm typ. Gear pitch range 24 DP (module 1.06) Gear 20 DP or coarser (module 1.27) Pole piece 2,69 mm 0.106 in Optimum actuator 20 DP (module 1.27) Air gap 0,127 mm diameter 0.005 in Min. surface 0,50 m/s 20 in/s typ. Max. operating 50 kHz typ. Load 100 kOhm speed frequency resistance Operating temp. -55 C to 230 C Vibration N/A range -67 F to 450 F Mounting thread 5/8-18 UNF-2A Termination MS3106 connector Catalog Weight Listing 3010HTB 70 g 2.5 oz HIGH RESISTANCE COILS FOR MAXIMUM OUTPUT VOLTAGE APPLICATIONS General Specifications Test Condition Specifications Parameter Characteristic Parameter Characteristic Parameter Characteristic Min. output voltage 125 Vp-p Inductance 450 mH max. Surface speed 25 m/s 1000 in/s Coil resistance 1055 Ohm typ. Gear pitch range 24 DP (module 1.06) Gear 20 DP or coarser (module 1.27) Pole piece 2,69 mm 0.106 in Optimum actuator 20 DP (module 1.27) Air gap 0,127 mm diameter 0.005 in Min. 0,25 m/s 10 in/s typ. Max. operating 15 kHz typ. Load 100 kOhm surface speed frequency resistance Operating temp. -55 C to 230 C Vibration N/A range -67 F to 450 F Mounting thread 5/8-18 UNF-2A Termination MS3106 connector Catalog Thread Weight Listing Length (A) 3030HTB 28 mm 1.1 in 70 g 2.5 oz 3030HTB25 63 mm 2.5 in 84 g 3.0 oz 2 www.honeywell.com/sensing