LVDT Transducer, 4-20mA Output

RDP Electronics' DCC Series is a stainless steel LVDT displacement transducer with a 4-20mA, 2-wire output for precise position and displacement measurement in industrial settings. It provides non-contact sensing throughout the measuring element, clean, drift-free data, infinite resolution, and a very long operational life. It is based on the LVDT (Linear Variable Differential Transformer) principle.

The series is available in three configurations to suit different applications:

• Unguided – a separate armature for true non-contact operation where external guidance is already provided (ranges from 5mm to 400mm)
• Captive guided – internal bearings guide the armature, ideal where external guidance is poor or end bearings are needed (ranges from 25mm to 940mm)
• Spring return – guided armature with an internal spring that drives it to full extension, useful where the armature can't be mechanically coupled to the moving part (ranges from 5mm to 150mm)

Key specifications:

• Supply: 12–36V DC excitation
• Output: 4-20mA (4mA = inward full scale), 2-wire loop
• Max loop resistance: (Vs - 11) × 50Ω
• Output ripple: 50μA peak-to-peak
• Bandwidth: 250Hz
• Linearity: ±0.5% F.S. standard, with ±0.25% or ±0.1% F.S. available on select models
• Temperature coefficient: ±0.03% F.S./°C typical
• Operating range: -10°C to 70°C
• Termination: 2m integral cable (longer lengths available on request)

Orderable parts are as follows: