Measure current

Measure temperature

Measure voltage

Measure displacement

I = V/R

I = R/V

I = I/VR

I = RV/I

Volt meter

Ammeter

Inductors

Solenoid

Relay

Thermostat

Intermediate switch

Limit switch

Linear Variable Differential Transformers

Linear Various Differential Transformer

Linear Variedly Differential Transformer

Low Variable Differential Transformers