General Purpose VRS (Variable Reluctance Speed) Magnetic Speed Sensors are robust, self-powered devices designed for applications requiring speed measurement in medium to high-speed environments or in electrically noisy conditions with small air gaps. These passive sensors utilize a permanent magnet to create a magnetic field. As a ferrous metal target passes the sensor's pole piece, the magnetic flux changes, inducing a current in the coil winding. This generates an AC voltage output (Vp-p) that varies in amplitude and frequency with the target's speed, providing a direct conversion of actuator speed to output frequency. They are adaptable to various configurations and offer simple installation with no moving parts. Honeywell also provides specialized VRS sensors for high output, power output, high resolution, high temperature, hazardous locations, and low-cost molded versions.
| Model Series | Housing Diameter | Mounting Thread | Min. Output Voltage (Vp-p) | Max. Operating Frequency (kHz) | Operating Temp. Range (C) | Coil Resistance (Ohm) | Inductance (mH) | Air Gap (mm) | Surface Speed (m/s) | Termination |
|---|---|---|---|---|---|---|---|---|---|---|
| 3010AN / 3010A | 5/8 in (M16*) | 5/8-18 UNF-2A | 40 | 50 (typ.) | -55 to 120 | 45 to 85 | 25 max. | 0.127 | 25 | MS3106 connector / 20 AWG Teflon-insulated leads |
| 3010H / 3010S | 5/8 in (M16*) | 5/8-18 UNF-2A | 40 | 50 (typ.) | -55 to 120 | 45 to 85 | 25 max. | 0.127 | 25 | 20 AWG Teflon-insulated leads / 20 AWG Teflon-insulated leads |
| 3015A / 3015S / 3015SS | 3/8 in (M12*) | 3/8-24 UNF-2A | 20 | 50 (typ.) | -40 to 107 | 45 to 65 | 15 max. | 0.127 | 25 | 24 AWG vinyl-insulated leads / 24 AWG vinyl-insulated leads |
| 3050 / 3050A / 3050S | 1/4 in (M8*) | 1/4-40 UNS-2A | 12 | 60 (typ.) | -40 to 107 | 190 max. | 16 max. | 0.127 | 25 | 30 AWG vinyl-insulated leads / 30 AWG PVC-insulated leads |
| 3080 | 10/32 in | 10-32 UNF-2A | 8 | 60 (typ.) | -40 to 107 | 155 | 14 max. | 0.127 | 25 | 32 AWG Teflon-insulated leads |
*Contact Honeywell for availability of metric mounting thread versions.