A sensor (also called detector) is a converter that measures a physical quantity and converts it into a signal which can be read by an observer or by an (today mostly electronic) instrument. A sensor is a device which receives and responds to a signal. A sensor's sensitivity indicates how much the sensor's output changes when the measured quantity changes.
Sensor & Transmitters are basic elements required for measuring any process variable. Scan Electronic Systems provides sensors / transmitters for TEMPERATURE, HUMIDITY and PRESSURE. HUMIDITY sensor comes with its transmitter so as to provide commonly used voltage or current output. It normally comes as a combined transmitter of temperature & humidity.These sensors are available in wide measuring range, operating temperature range etc. Sensor selection is mainly based on measuring range, operating conditions, mounting, size, medium, application area (hazardous or safe), type of output signal required.