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D5W Submersible LVDT Displacement Transducer

　
High accuracy
Miniature
High cycle life
Submersible
Stainless steel
Infinite resolution



RDP LVDT How it Works

   Data sheet (195kb)
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.

Our submersible displacement transducers are designed to make measurements whilst submerged in suitable liquids. Fluids which are non-magnetic can be allowed to flood the armature tube without affecting the operation of the transducer.

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.Connection details
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

　
End (axial) exit cable.
　 D1
D5/40W 8.0mm
D5/100W to MD5/500W 9.5mm
D3 = 2.00mm
TF = M3x0.5
CL (Cable length). = See specification.
CSL (Cable sleeve length). = See specification.
Type Range Linearity error (% F.S.) L X ID Total weight Armature weight TF Inward over-travel Over-Travel
Sensitivity (nom)
D5/40W ?mm <?.5/?.25 46mm 15.7mm 2.30mm 20g 1.3g 13mm 2.0mm 143mV/V
D5/100W ?.5mm <?.5/?.25 53mm 19.5mm 2.29mm 22g 1.4g 14mm 1.5mm 375mV/V
D5/200W ?mm <?.5/?.25/?.1 55mm 26.3mm 2.29mm 24g 1.8g 19mm 2.9mm 320mV/V
D5/300W ?.5mm <?.5/?.25/?.1 70mm 30.0mm 2.54mm 26g 1.8g 19mm 4.0mm 435mV/V
D5/400W ?0mm <?.5/?.25 74mm 32.5mm 2.54mm 34g 1.9g 19mm 3.9mm 567mV/V
MD5//500W ?2.5mm <?.5/?.25 90mm 35.0mm 2.54mm 42g 2.3g 19mm 3.9mm 773mV/V

　
Side (radial) exit cable.Connection details
　 D1
D5/40WRA 8.0mm
D5/100WRA to MD5/500WRA 9.5mm
D3 = 2.00mm
TF = M3x0.5
A = 8mm (nominal)
CL1 = 18mm
CL (Cable length). = See specification.
CSL (Cable sleeve length). = See specification.
Type Range Linearity error (% F.S.) L X ID Total weight Armature weight TF Inward over-travel Over-Travel
Sensitivity (nom)
D5/40WRA ?mm <?.5/?.25 48mm 19.0mm 2.30mm 20g 1.3g 13mm 2.0mm 143mV/V
D5/100WRA ?.5mm <?.5/?.25 53mm 19.5mm 2.29mm 22g 1.4g 14mm 1.5mm 375mV/V
D5/200WRA ?mm <?.5/?.25/?.1 55mm 26.3mm 2.29mm 24g 1.8g 18mm 2.9mm 320mV/V
D5/300WRA ?.5mm <?.5/?.25/?.1 70mm 30.0mm 2.54mm 26g 1.8g 18mm 4.0mm 435mV/V
D5/400WRA ?0mm <?.5/?.25 74mm 32.5mm 2.54mm 34g 1.9g 18mm 3.9mm 567mV/V
MD5/500WRA ?2.5mm <?.5/?.25 90mm 35.0mm 2.54mm 42g 2.3g 18mm 3.9mm 773mV/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.
Spring return transducers should be cleared of air as trapped air may compress under pressure an cause errors. The mechanical frequency response of transducers may be reduced by fluid in the internal tubes.

　
End (axial) exit cable.Connection details
　 D1 D2 D3 L2
D5/40AW 8.0mm 7.0mm 3.96mm 7.2mm
D5/100AW to MD5/500AW 9.5mm 8.0mm 4.75mm 8.0mm
CL (Cable length). 　 = 　 See specification.
CSL (Cable sleeve length). 　 = 　 See specification.
Type Range Linearity error (% F.S.) L X Total weight Over-Travel Sensitivity (nom)
Inward over-travel Outward over-travel
D5/40AW ?mm <?.5/?.25 58mm 11.5mm 11g 1.0mm 1.5mm 143mV/V
D5/100AW ?.5mm <?.5/?.25 69mm 12.5mm 30g 1.1mm 1.1mm 375mV/V
D5/200AW ?mm <?.5/?.25/?.1 76mm 13.7mm 34g 1.4mm 0.3mm 320mV/V
D5/300AW ?.5mm <?.5/?.25/?.1 98mm 15.3mm 38g 1.4mm 1.3mm 435mV/V
D5/400AW ?0mm <?.5/?.25 110mm 19.0mm 44g 1.3mm 1.3mm 567mV/V
MD5/500AW ?2.5mm <?.5/?.25 132mm 21.6mm 52g 1.9mm 1.3mm 773mV/V

　
Side (radial) exit cable.Connection details
　 D1 D2 D3 L2
D5/40AWRA 8.0mm 7.0mm 3.96mm 7.2mm
D5/100AWRA to MD5/500AWRA 9.5mm 8.0mm 4.75mm 8.0mm
A = 8mm (nominal)
CL1 = 18mm
CL (Cable length). = See specification.
CSL (Cable sleeve length). = See specification.
Type Range Linearity error (% F.S.) L X Total weight Over-Travel Sensitivity (nom)
Inward over-travel Outward over-travel
D5/40AWRA ?mm <?.5/?.25 59mm 11.5mm 11g 1.0mm 1.5mm 143mV/V
D5/100AWRA ?.5mm <?.5/?.25 69mm 12.5mm 30g 1.1mm 1.1mm 375mV/V
D5/200AWRA ?mm <?.5/?.25/?.1 76mm 13.7mm 34g 1.4mm 0.3mm 320mV/V
D5/300AWRA ?.5mm <?.5/?.25/?.1 98mm 15.3mm 38g 1.4mm 1.3mm 435mV/V
D5/400AWRA ?0mm <?.5/?.25 110mm 19.0mm 44g 1.3mm 1.3mm 567mV/V
MD5/500AWRA ?2.5mm <?.5/?.25 132mm 21.6mm 52g 1.9mm 1.3mm 773mV/V

　

Specification
Excitation/supply (acceptable) 0.5V to 7V rms, 2kHz to 10kHz (sinusoidal) Operating temperature range -20癈 to 125癈
Excitation/supply (calibrated) 5V rms, 5kHz (sinusoidal) Maximum pressure when sealed on inner cable with TM0960 2MPa
Output load 100k Ohms Maximum pressure when sealed on cable sleeve 3MPa
Temperature coefficient (span) ?.01% F.S. /癈 (typical) 　 　

　
Cable length Standard cable CSL (Cable sleeve length) = 2m, CL (Cable length) = 2m
Maximum cable sleeve length 7m
Option code TM0828 CSL (Cable sleeve length) = 600mm, CL (Cable length) = 600mm to 1000m
Option code TM0960 CSL (Cable sleeve length) = 50mm, CL (Cable length) = 600mm to 1000m

　

Options and accessories
Alternative probe tips for LVDTs
Mounting block
Electronics
RDP Logo

D5 Series Submersible LVDT Displacement Transducers

Short stroke Submersible LVDT displacement transducers come in two armature configurations:-

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Unguided Armature transducers have an armature which is a separate component from the body of the transducer. This provides the possibility of friction free and non-contact movement and is appropriate for applications with a very high number of cycles. Water and most other liquids may enter the internal tube of the transducer without any affect on the operation of the transducer.
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Spring Return Armature transducers have a guided armature which is spring loaded. The spring pushes the armature to its outer end stop. The end of the armature is fitted with a ball ended probe. Care must be taken when using this type of transducer in a submersible application as the liquid will dramatically reduce the mechanical frequency response.

Due to the RDP Electronics policy of on-going development, specifications may change without notice.
Any modification may affect the specification of our equipment.