D5 & D6 LVDT Displacement Transducer

Infinite resolution
High cycle life
Stainless steel
High accuracy
Miniature



How it Works - LVDT

   Data sheet (199kb)
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.

The LVDTs are available as either unguided or spring return versions.

LVDT transducers require external signal conditioning as detailed in the 'Electronics' section of this website.

Unguided version.
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

No cable fitted (cable fitted by user).Connection details
  D1= 9.5mm
TF= M3x0.5
Type Range Linearity error (% F.S.) L X D3 ID Total weight Armature weight TF Over-Travel Sensitivity (nom)
Inward over-travel
D5/25K ±0.65mm <±0.5/±0.25 19mm 28mm 2.00mm 3.17mm 14g 1.3g 19mm 7.9mm 43mV/V
D5/100K ±2.5mm <±0.5/±0.25/±0.1 32mm 19mm 2.36mm 2.59mm 16g 1.4g 15mm 1.3mm 193mV/V
D5/200K ±5mm <±0.5/±0.25/±0.1 34mm 25mm 2.36mm 2.59mm 18g 1.8g 18mm 1.5mm 365mV/V
D5/300K ±7.5mm <±0.5/±0.25/±0.1 47mm 30mm 2.00mm 2.54mm 20g 1.8g 18mm 3.9mm 502mV/V
D5/400K ±10mm <±0.5/±0.25 52mm 33mm 2.00mm 2.54mm 26g 1.9g 18mm 4.4mm 576mV/V
MD5/500K ±12.5mm <±0.5/±0.25 68mm 35mm 2.00mm 2.54mm 34g 2.3g 18mm 4.3mm 775mV/V

End (axial) exit cable.
Connection details (D5)   D1= 9.5mm
Connection details (D6) TF= M3x0.5
Type Range Linearity error (% F.S.) L X D3 ID Total weight Armature weight TF Over-Travel Sensitivity (nom)
Inward over-travel
D5/25HK ±0.65mm <±0.5/±0.25 35mm 28mm 2.00mm 3.17mm 14g 1.3g 19mm 7.9mm 43mV/V
D6/02500U ±2.5mm <±0.5/±0.25/±0.1 43mm 19mm 2.00mm 2.90mm 17g 1.8g 15mm 1.5mm 375mV/V
D6/05000U ±5mm <±0.5/±0.25/±0.1 56mm 25mm 2.00mm 2.90mm 21g 1.8g 18mm 2.0mm 700mV/V
D5/300HK ±7.5mm <±0.5/±0.25/±0.1 58mm 30mm 2.00mm 2.54mm 20g 1.8g 18mm 3.9mm 502mV/V
D5/400HK ±10mm <±0.5/±0.25 63mm 33mm 2.00mm 2.54mm 26g 1.9g 18mm 4.4mm 576mV/V
MD5/500HK ±12.5mm <±0.5/±0.25 79mm 35mm 2.00mm 2.54mm 34g 2.3g 18mm 4.3mm 775mV/V

Side (radial) exit cable.
Connection details (D5)   D1= 9.5mm
A= 6mm (nominal)
Connection details (D6) TF= M3x0.5
Type Range Linearity error (% F.S.) L X D3 ID Total weight Armature weight TF Over-Travel Sensitivity (nom)
Inward over-travel
D6/02500URA ±2.5mm <±0.5/±0.25/±0.1 45mm 19.3mm 2.00mm 2.92mm 17g 1.8g 15mm 1.5mm 375mV/V
D6/05000URA ±5mm <±0.5/±0.25/±0.1 60mm 25.4mm 2.00mm 2.92mm 21g 1.8g 18mm 2.0mm 700mV/V
D5/300HKRA ±7.5mm <±0.5/±0.25/±0.1 60mm 30.0mm 2.00mm 2.54mm 20g 1.8g 18mm 3.9mm 502mV/V
D5/400HKRA ±10mm <±0.5/±0.25 65mm 32.5mm 2.00mm 2.54mm 26g 1.9g 18mm 4.4mm 576mV/V
MD5/500HKRA ±12.5mm <±0.5/±0.25 81mm 34.9mm 2.00mm 2.54mm 34g 2.3g 18mm 4.3mm 775mV/V

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.

End (axial) exit cable.
Connection details (D5)
  D1
D6/00250A to D6/01000A 8.0mm
D6/02500A to MD5/500AG 9.5mm
Connection details (D6)
Type Range Linearity error (% F.S.) L X Total weight Spring force (nom) Over-Travel Sensitivity (nom)
Spring force at X Spring rate Inward over-travel Outward over-travel
D6/00250A ±0.25mm <±0.5/±0.25 49mm 12.2mm 11g 0.6N 1.2N/cm 0.6mm 0.6mm 38mV/V
D6/00500A ±0.5mm <±0.5/±0.25 49mm 12.2mm 11g 0.6N 1.2N/cm 0.3mm 0.3mm 75mV/V
D6/01000A ±1mm <±0.5/±0.25/±0.1 52mm 13.1mm 12g 0.4N 1.2N/cm 2.5mm 0.2mm 150mV/V
D6/02500A ±2.5mm <±0.5/±0.25/±0.1 61mm 11.5mm 25g 0.9N 0.9N/cm 1.3mm 1.3mm 375mV/V
D6/05000A ±5mm <±0.5/±0.25/±0.1 78mm 12.3mm 30g 0.9N 0.8N/cm 1.1mm 1.4mm 700mV/V
D5/300AG ±7.5mm <±0.5/±0.25/±0.1 88mm 15.3mm 34g 1.1N 0.6N/cm 1.1mm 1.6mm 502mV/V
D5/400AG ±10mm <±0.5/±0.25 99mm 19.0mm 40g 1.4N 0.4N/cm 2.5mm 1.3mm 576mV/V
MD5/500AG ±12.5mm <±0.5/±0.25 121mm 21.6mm 48g 1.4N 0.4N/cm 2.5mm 1.3mm 775mV/V

Side (radial) exit cable.
Connection details (D5)
  D1
D6/00250ARA to D6/01000ARA 8.0mm
D6/02500ARA to MD5/500AGRA 9.5mm
Connection details (D6) A= 6mm (nominal)
Type Range Linearity error (% F.S.) L X Total weight Spring force (nom) Over-Travel Sensitivity (nom)
Spring force at X Spring rate Inward over-travel Outward over-travel
D6/00250ARA ±0.25mm <±0.5/±0.25 50mm 12.2mm 11g 0.6N 1.2N/cm 0.6mm 0.6mm 38mV/V
D6/00500ARA ±0.5mm <±0.5/±0.25 50mm 12.2mm 11g 0.6N 1.2N/cm 0.3mm 0.3mm 75mV/V
D6/01000ARA ±1mm <±0.5/±0.25/±0.1 53mm 13.1mm 12g 0.4N 1.2N/cm 2.5mm 0.2mm 150mV/V
D6/02500ARA ±2.5mm <±0.5/±0.25/±0.1 64mm 11.5mm 25g 0.9N 0.9N/cm 1.3mm 1.3mm 375mV/V
D6/05000ARA ±5mm <±0.5/±0.25/±0.1 83mm 12.3mm 30g 0.9N 0.8N/cm 1.1mm 1.4mm 700mV/V
D5/300AGRA ±7.5mm <±0.5/±0.25/±0.1 90mm 15.3mm 34g 1.1N 0.6N/cm 1.1mm 1.6mm 502mV/V
D5/400AGRA ±10mm <±0.5/±0.25 102mm 19.0mm 40g 1.4N 0.4N/cm 2.5mm 1.3mm 576mV/V
MD5/500AGRA ±12.5mm <±0.5/±0.25 124mm 21.6mm 48g 1.4N 0.4N/cm 2.5mm 1.3mm 775mV/V


Specification
Excitation/supply (acceptable)0.5V to 7V rms, 2kHz to 10kHz (sinusoidal) Temperature coefficient (span) ±0.01% F.S. /°C (typical)
Excitation/supply (calibrated)5V rms, 5kHz (sinusoidal) Operating temperature range -20°C to 125°C
Output load100k Ohms Electrical termination 2m (integral cable) Longer available to order.
Temperature coefficient (zero)±0.01% F.S. /°C (typical)    


Options and accessories
TM0315 Operating temperature range (maximum) = 200°C
Alternative Probe Tips For LVDTs
Mounting Block
Electronics


All dimensions and specifications are nominal. www.rdpe.com/uk/d5-d6.htm 20080110
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
United Kingdom
Tel: +44 1902 457512
Fax: +44 1902 452000
Email: sales@rdpe.com
URL: www.rdpe.com
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