RDP LVDT How it Works
Data sheet (315kb)
| These transducers are for displacement / position measurement. They make an accurate position measurement of the movement of the armature (the sliding part) relative to the body of the displacement transducer. |
This transducer uses the Linear Variable Differential Transformer (LVDT) principle which means that it is probably the most robust and reliable position sensor type available. The strength of the LVDT sensor's principle is that there is no electrical contact across the transducer position sensing element which for the user of the sensor means clean data, infinite resolution and a very long life.
This series of displacement transducer is available as either an unguided, captive or spring return version.
LVDT transducers require external signal conditioning as detailed in the 'Electronics' section of this website.
|On our unguided LVDTs the armature assembly is a separate component, to make a measurement the user must guide the armature inside the body without touching the sides. Unguided position measurement transducers are appropriate where external guidance is available and give truly non-contact operation|
|Type||Range||Linearity error (% F.S.)||L||X (nom)||Total weight||Armature weight||TF||Over-Travel||Sensitivity (nom)|
|Captive guided version.|
|Our captive guided displacement transducer has bearings to guide the armature inside the measurement sensor. Captive LVDTs are for position measurement applications where guidance may be poor and end bearings may be required.|
|Type||Range||Linearity error (% F.S.)||L||X (nom)||D3||Total weight||TF||Over-Travel||Sensitivity (nom)|
|Inward over-travel||Outward over-travel|
|Spring return version.|
|Our spring displacement transducer has bearings to guide the armature inside the measurement sensor and a spring which pushes the armature to the fully out position. Spring return LVDTs are appropriate where it is not possible to connect the transducer armature to the moving component being measured.|
|Type||Range||Linearity error (% F.S.)||L||X (nom)||Total weight||Spring force (nom)||Over-Travel||Sensitivity (nom)|
|Spring force at X||Spring rate||Inward over-travel||Outward over-travel|
|Due to our policy of on-going development, specifications may change without notice. Any modification may affect some or all of the specifications for our equipment.|
|UK Head Office
RDP Electronics Ltd
Grove Street, Heath Town
Wolverhampton, West Midlands, WV10 0PY
Tel: +44 1902 457512
Fax: +44 1902 452000
Registered in England No. 1688591