sensior is incorrectly written, and should be written as "sensor" being its meaning: sensior = sensorUn sensor is a device capable of detecting physical or chemical quantities called instrumentation variables, and transform them into electric variables. Instrumentation variables can be for example: temperature, light intensity, distance, acceleration, inclination, displacement, pressure, force, torque, humidity, motion, pH, etc. Electrical magnitude can be an electrical resistance ( as in a RTD ) a electric capacity ( as a sensor of humidity ) a voltage ( as a thermocouple ) an electric current ( and a phototransistor ) etc.