• RDP Electrosense offers specialized D6-A variants of their LVDT (Linear Variable Differential Transformer) displacement transducers designed for harsh conditions.
• These transducers operate effectively under high pressure, in gamma-radiation fields, and even in non-conductive oil.
• The durability and reliability come from features like an encapsulated winding, magnetic shielding, stainless steel housing, rugged construction, low-friction bearings, and ball-ended probes. 

How to choose the Environment for my LVDT sensor
RDP LVDT transducers are very robust and reliable but it is important to select the correct LVDT for your environment.

A clean dry environment ranges from use in a laboratory to a typical manufacturing line. Most of our LVDT transducers will tolerate being splashed with non-corrosive and non-conductive oil. RDP LVDTs are made of stainless steel so you just need to ensure that non-compatible fluids do not get inside the transducer where the electronics live. Any tacky substances that could cause the sliding parts to stick should be avoided. Particulate matter is only an issue if it causes mechanical seizure of the moving parts. Fragments of metals that are attracted by a magnet should not be allowed to enter the inner mechanics of the transducer.

A moist environment is where there is very high humidity or splashed water us such as outdoors. The transducers should ideally be mounted with the armature pointing vertically downward or at worst horizontally. Any water that collects in the inner tubes of the LVDT could be forced under pressure by the moving armature into the inner electronics and so a submersible unit would be necessary if this is a possibility.

Our waterproof and submersible sensors are suitable for long-term submersion in fluids that are non-corrosive to stainless steels and other metals used in construction. The pressure rating of the waterproof transducer depends on the electrical cable option selected.

Finally for use in seawater then our range of specific seawater submersible LVDTs is the choice; these are submersible up to 2.2km for 10 years or more.

Any LVDT transducer should be protected from ice as it could at the least cause the transducer to seize but could in extreme cases cause the transducer to me damaged. They can be used well below freezing but they must be dry.

If your environment is not described here then please contact us; we have designed LVDT sensors for use in liquid lead at 400? as well as LVDTs for cryogenic environments so we will almost certainly have the answer.

RDP
RDP is a designer and manufacturer and distributor of LVDT displacement transducers, amplifiers, load cells and pressure sensors for use in a wide range of applications. We are privately owned by the two directors who started the company in 1966. Our extensive range LVDT displacement sensors and amplifiers are manufactured by us at our UK head office and factory. RDP was one of the first manufacturers of LVDT displacement transducers and the first to build the LVDT signal conditioning amplifier into the sensor.