A sensing element is the physical part of the transducer that is in direct contact with the quantity to be measured, that responds to a stimuli by producing a distinct measurable output. The Mechanical element that is the most integral part of converting sensed form of energy to another can be roughly divided into five depending on the underlying physical characteristics that brings about the response to the stimuli.
A.
Type - Contacting Spindle, pin or finger Operation - Displacement to displacement
B. Elastic Member
Type - Proving ring Operation - Force to displacement
Type - Bellows Operation - Pressure to displacement
Type - Bourdon Tube Operation - Pressure to displacement
Type - Diaphragm Operation - Pressure to displacement
Type - Spring Operation - Force to displacement
C. Mass
Type - Seismic mass Operation - Force to displacement
Type - Pendulum scale Operation - Force to displacement
Type - Manometer Operation - Pressure to displacement
D. Thermal
Type - Thermocouple Operation - Temperature to electrical current
Type - Bimaterial Operation - Temperature to displacement
Type - Temp-stik Operation - Temperature to phase
E. Hydro- pneumatic
- Static
Type - Float Operation - Fluid level to displacement
Type - Hydrometer Operation - Specific gravity to displacement
- Dynamic
Type - Orifice Operation - Velocity to pressure
Type - Venturi Operation - Velocity to pressure
Type - Pilot tube Operation - Velocity to pressure
Type - Vanes Operation - Velocity to force
Type - Turbines Operation - Linear to angular velocity