A magnetic pickup sensor datasheet provides critical technical specifications for engineers and technicians seeking precise speed and position detection solutions. These compact electromagnetic devices generate voltage signals by detecting ferrous target movements, offering robust performance across automotive, industrial automation, and machinery monitoring environments. Understanding their electrical characteristics, physical dimensions, and operational parameters is essential for accurate sensor selection and implementation.
What Are Magnetic Pickup Sensors?
Magnetic pickup sensors are precision electromagnetic devices designed to convert mechanical motion into electrical signals. They operate by detecting variations in magnetic flux when ferrous targets pass near their sensing element.
Key Components of Magnetic Pickup Sensors
| Component | Function | Material |
|---|---|---|
| Permanent Magnet | Generate stable magnetic field | Rare earth metals |
| Pole Piece | Concentrate magnetic flux | Ferromagnetic alloy |
| Sensing Coil | Generate voltage pulse | Copper wire |
| Enclosure | Protect internal components | Stainless steel/Epoxy |
What Are the Electrical Characteristics?
Supply Voltage Requirements
- Logic Magnetic Pickups (LMP):
- Range: +9 to +17 VDC
- Maximum current: 25 mA
-
Two output signal versions:
- Current sinking
- Current sourcing
-
Self-Generating Models:
- No external power needed
- Typical output: 200 V.P.P. at 1000 I.P.S.
Frequency Response Capabilities
- Frequency range up to 10 KHz
- Pulse rate compatibility with ASTC circuits
- Suitable for high-speed mechanical systems
How Do Magnetic Pickup Sensors Generate Signals?
Signal Generation Mechanism
Magnetic pickup sensors generate electrical signals through magnetic field disruption:
- Permanent magnet creates stable magnetic field
- Ferrous target passes sensing area
- Magnetic flux variations induce voltage
- Voltage pulse proportional to target speed
- Signal processed for speed/position measurement
What Are the Physical Dimensions?
Typical Sensor Configurations
- Logic Magnetic Pickups:
- Case diameter: 0.750″ ±0.005″
- Case material: #304 stainless steel
-
Sensing face: Plastic with stainless steel pole
-
Enovation Controls Models:
- Lengths: 3-4.5 inches
- Thread sizes: 5/8-18 UNF, 3/4-16 UNF
Where Are Magnetic Pickup Sensors Applied?
Primary Application Areas
- Automotive Engine Speed Monitoring
- Industrial Machinery Rotation Detection
- Tachometer Systems
- Gear Tooth Counting
- Vibration Measurement
What Installation Considerations Exist?
Critical Installation Parameters
- Precise air gap measurement
- Avoiding metal debris
- Proper mounting angle
- Signal cable management
- Environmental protection
What Performance Limitations Exist?
Sensor Performance Constraints
- Temperature sensitivity
- Signal degradation over distance
- Magnetic field interference
- Mechanical wear
- Precision alignment requirements
Recommended Practices
- Use shortest possible signal cables
- Maintain recommended air gap
- Protect from extreme temperatures
- Regular calibration
- Use appropriate shielding
Reference:
– Logic Magnetic Pickups Manual
– Enovation Controls Documentation
– Industrial Sensor Guidelines