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LD400
Miniature, LVDT Linear Position Sensors
Models In Stock
- High Output Miniature LVDT Transducers
- Ideal for Small Actuators
- Delrin Bearings for Precise Motion
- Infinite Resolution
LD400
From
TWD
26,641
Models In Stock
Product Overview
- Accuracy Detail Provided with a transducer output impedance of 2.4 kΩ into a calibration load of 20 kΩ at 20°C (68°F); variations in these parameters will change performance
- Additional Features 1 Miniature DC Displacement
- Bandwidth 50 Hz (-3 dB)
- Cable Length 2 m
- Cable Type Insulated Shielded
- Compensated Temperature, Max 80 °C
- Compensated Temperature, Min -20 °C
- Core Material Ni/Fe—Radio Metal 50
- Electrical Connection Pigtail Leads
- Electrical Output DC
- Enclosure Ratings IP67
- Housing Material 400 Stainless Steel
- Input Current 10 mA
- Operating Temperature, Max 80 °C
- Operating Temperature, Min -20 °C
- Output Ripple <1%
- Series ID LD400
- Supply Voltage 10 to 24 Vdc
- Weight 26 g
Supported Applications
The Omega LD400 series consists of miniature DC output linear variable displacement transducers (LVDTs) designed to measure displacements up to ±5.0 mm (±0.20"). These self-contained units accept a regulated DC input and provide a DC voltage output relative to armature position, utilizing hybrid ICs including an oscillator, demodulator, and filter. The series is engineered for applications in civil, mechanical, chemical, and production engineering where high linearity and low mass of moving parts are required.
Operating Conditions & Performance
The LD400 transducers operate within a compensated temperature range of -20 to 80°C (-4 to 176°F). The series delivers an accuracy (linearity) of 0.3% FS and features infinite resolution for detecting the smallest movement identifiable by associated instrumentation. Electrical performance includes an excitation requirement of 10 to 24 Vdc regulated, with a frequency response of 50 Hz at -3 dB and ripple less than 1% FS.
Response time varies by model stroke: LD400-1 and LD400-2.5 models exhibit a 5 ms response time, while the LD400-5 model provides a 3 ms response time. Thermal effects on zero are specified as less than 0.02% FS/°C for the LD400-1 and less than 0.01% FC/°C for the LD400-2.5 and LD400-5; sensitivity thermal drift is less than 0.025% FC/°C.
Configuration Options
The series offers three distinct stroke configurations, each with specific dimensions and weights:
- LD400-1: ±1.0 mm (±0.04") stroke; 75 mV/V/mm sensitivity.
- LD400-2.5: ±2.5 mm (±0.10") stroke; 75 mV/V/mm sensitivity.
- LD400-5: ±5.0 mm (±0.20") stroke; 54 mV/V/mm sensitivity.
Mechanical construction features a free-guided armature with acetal bearings to provide near-frictionless motion. The case material is 400 Series stainless steel, and the core utilizes Ni/Fe—Radio Metal 50. Each unit includes an M2 threaded core for connection.
Key Product Differences
The primary distinction among models lies in stroke length, which influences sensitivity values and physical dimensions. The LD400-1 and LD400-2.5 share identical body weights of 26 g (1.02 oz) and core weights of 1.0 g (0.04 oz), with overall dimension A at 21.5 mm (0.85 in). The LD400-5 model has a slightly shorter diameter (A: 20.5 mm / 0.81 in) but increased length and weight, totaling 30 g (1.18 oz) for the body.
Electrical connections are provided via a 2.9 m (9') shielded, color-coded cable with specific pinouts: Red (+ Excitation), Blue (- Excitation), White (+ Signal*), Green (- Signal), and Yellow (No connection). The white signal wire is in phase for positive inward displacement.
