RDP Home Page Banner

SSA Seawater Submersible LVDT Displacement Transducer


High cycle life
Seawater submersible
Stainless steel
Infinite resolution
image of SSA Seawater Submersible LVDT Displacement Transducer
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 SS series LVDTs are specially designed for use in sea water and heavy industrial environments with some corrosive chemicals. These LVDTs are made of welded 316 stainless steel and have a through bore plus very heavy construction. Therefore, the SS series LVDTs are capable of withstanding the most arduous industrial applications as well as 10 years seawater submersion at a depth of up to 2.3km.
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
Side (radial) exit cable.
dimensional drawing of  SSA Seawater Submersible LVDT Displacement Transducer
A=48mm
CD1=35mm
CL1=92mm
D1=38.1mm
D3=10mm
ID=13mm
MZ=27mm (Optimum sensor mounting zone)
TF=M10x1.5, 30mm
Type Range Linearity error (% F.S.) L X (nom) LA Total weight Armature weight Sensitivity (nom)
SSA500 ±12.5mm ±0.5 224mm 53mm 145mm 1.1kg 90g 0.3V/V
SSA1000 ±25mm ±1 251mm 66mm 170mm 1.2kg 100g 0.4V/V
SSA2000 ±50mm ±0.5 346mm 91mm 265mm 1.7kg 160g 0.3V/V
SSA3000 ±75mm ±0.5 435mm 117mm 349mm 1.9kg 210g 0.5V/V
SSA4000 ±100mm ±0.5 536mm 142mm 440mm 2.1kg 260g 0.7V/V

Specification
Excitation/supply (acceptable) 1V to 7V rms, 1kHz to 5kHz (sinusoidal)
Excitation/supply (calibrated) 5V rms, 5kHz (sinusoidal)
Temperature coefficient (span) ±0.01% F.S. /℃ (typical)
Operating temperature range -40℃ to 60℃
Mounting thread M10x1.5
Electrical termination 2m (integral cable)
Maximum static pressure 23MPa

Connection details
SSA

Options and accessories