Descrizione
MEVS Sereis Magnetic Speed Sensor For Machine Tools Conveyor Belt
Descrizione
MEVS speed sensor is basically a permanent magnet with wire wrapped around it. The internal construction of the speed sensor is a magnet, pole piece and coil. A magnetic field (lines of flux) extends from the magnet, through the pole piece and coil out into the air space at the end of the sensor. The return path of the magnetic field is from the air space to the other end of the magnet. As a ferrous toothed ring on the wheel passed the tip of the pole piece, the magnetic field increases and then decreases as the object moves away from the pole piece. The snap or the rapid change in the magnetic field induces an AC voltage signal in the coil. With an ideal target and matching sensor, the induced voltage is in the shape of a sine wave.
The frequency and amplitude of the AC voltage signal are proportional to the speed of the wheel. The amplitude of the wheel speed signal is also directly related to the distance between the wheel speed sensor coil and the toothed ring. The distance is referred to as the air gap. This gap is critical to ensure AC output at lower speeds.
Descrizione
MEVS speed sensor is basically a permanent magnet with wire wrapped around it. The internal construction of the speed sensor is a magnet, pole piece and coil. A magnetic field (lines of flux) extends from the magnet, through the pole piece and coil out into the air space at the end of the sensor. The return path of the magnetic field is from the air space to the other end of the magnet. As a ferrous toothed ring on the wheel passed the tip of the pole piece, the magnetic field increases and then decreases as the object moves away from the pole piece. The snap or the rapid change in the magnetic field induces an AC voltage signal in the coil. With an ideal target and matching sensor, the induced voltage is in the shape of a sine wave.
The frequency and amplitude of the AC voltage signal are proportional to the speed of the wheel. The amplitude of the wheel speed signal is also directly related to the distance between the wheel speed sensor coil and the toothed ring. The distance is referred to as the air gap. This gap is critical to ensure AC output at lower speeds.
Specifiche
| Articolo | Parametro |
| Voltage Output Min. | 12.0V p-p |
| Coil Resistance | 910~1200Ω |
| Pole Diameter | 2.90mm |
| Surface Linear Speed Min. | 10 m/s |
| Temperatura di lavoro | -55ºC ~ 120ºC |
| Mounting Thread | 5/8-18 UNF-2A |
| Inductance | 450mH (Max.) |
| Working Freqency Max. | 15KHz (Tipico) |
| Vibration Grade | Mil-Std 202F Method 204D |
| Wire Specification | 20 AWG Teflon insulated Wire |
Testing Condition:
Gear: 60 teeth, φ186mm Air Gap: 0.5mm Load Impedance: 1.25K
Applicazione: Machine tool, conveyor belt, flowmeter measurement, transmission and wheel speed.
Model Selection
| Modello | Pole Diameter | Putout | Thread length | Cable length and Terminal | Mounting Thread | Sensor dimension |
| MEVS-300 series | ¢3.3 Flush ¢3.2×1.65 ¢2.7×0.5 ¢3.3Flush Sealed |
0-10 V NPN 0-5 V NPN 0-Vs, NPN 0-Vs, NPN open Collector 0-Vs, NPN/PNP |
28 33 |
3pin MS 3106 3pin MS 3102 4pin Bayonet 6pin Bayonet |
11/16″-24UNF |
 |
| ¢3.3 Flush ¢3.2×1.65 ¢2.7×0.5 ¢3.3Flush Sealed |
0-10 V NPN 0-5 V NPN 0-Vs, NPN 0-Vs, NPN open Collector 0-Vs, NPN/PNP |
18 33 |
MS 3106 3spillo MS 3102 3spillo Micro-c 3pin Bayonet 4pin Bayonet 6pin |
11/16″-24UNF |
 |
|
| ¢3.3 Flush ¢3.2×1.65 ¢2.7×0.5 ¢3.3 Flush Sealed |
0-10 V NPN 0-5 V NPN 0-Vs, NPN 0-Vs, NPN open collector 0-Vs, NPN/PNP |
28 33 |
600 wire & conn. 1000 shield cable 2000 shield cable |
11/16″-24UNF
|
 |
|
| ¢3.3 Flush ¢3.2×1.65 ¢2.7×0.5 ¢3.3 Flush sealed |
0-10 V NPN 0-5 V NPN 0-Vs, NPN 0-Vs, NPN open collector 0-Vs, NPN/PNP |
28 33 |
600 single lead 1000 shield cable 2000 shield cable |
11/16″-24UNF +1/2-14 NPT |
 |
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