SSD Seawater Submersible LVDT Displacement Transducer

High resolution
Voltage / 4-20mA output
High cycle life
Seawater submersible
Stainless steel

How it Works - Dc LVDT
How it Works - 4 to 20mA LVDT

   Data sheet (244kb)
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 DC to DC LVDT transducer has all of the benefits of the LVDT sensor principle with the added convenience of built-in LVDT electronics enabling a dc supply and dc output. As an option we can offer a 4-20mA 2 wire connection to the transducer on some models.

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 7546ft.

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.
MZ=1.1'' (Optimum sensor mounting zone)
TF=M10x1.5, 1.18''
TypeRangeLinearity error (% F.S.)LX (nom)LATotal weightArmature weight
SSD500±12.5mm (±0.5'')<±0.58.8''2.1''5.71''2.5lb3.18oz
SSD1000±25mm (±1'')<±19.9''2.6''6.69''2.9lb3.53oz
SSD2000±50mm (±2'')<±0.513.6''3.6''10.43''3.9lb5.64oz
SSD3000±75mm (±3'')<±0.517.1''4.6''13.74''4.3lb7.41oz
SSD4000±100mm (±4'')<±0.521.1''5.6''17.32''4.7lb9.17oz

Output details
Option codeNote- position0+position
Standard Connection details  -5V (+0% - 5%)0V 5V (+0% - 5%)
TM0627  5V (+0% - 5%)0V-5V (+0% - 5%)
TM0085A Connection details  0V5V10V (+0% - 5%)
TM0085B Connection details  10V (+0% - 5%)5V0V
TM0321A Connection details >=±12.5mm (±0.5'')4mA12mA20mA
TM0321B Connection details >=±12.5mm (±0.5'')20mA12mA4mA

V outputSupply voltage (dual)±12V to ±20V dc, 30mA
Supply voltage (single, must be floating) 24V to 40V dc, 30mA
Change in output for change in supply5mV/V (typical)
Output load10kOhms
Output ripple30mV peak-to-peak (typical)
Electrical output bandwidth 200Hz
Output impedance2 Ohms
Operating temperature range-40F to 140F
4-20mA outputSupply voltage12V to 36V dc
Max loop resistance(Supply voltage-11) x 50 Ohms
Output ripple50uA (peak-to-peak)
Electrical output bandwidth200Hz
Operating temperature range14F to 140F
Both outputsTemperature coefficient (span)±0.017% F.S. /F (typical)
Electrical termination6.6ft (integral cable)
Maximum static pressure3336psi

All dimensions and specifications are nominal. 20170119
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.

RDP Electrosense
2216 Pottstown Pike
Pottstown, PA 19465
Tel: 610-469-0850
Tel: 800-334-5838
Fax: 610-469-0852