Acidity sensor assemblies; Active infra-red sensors; Air temperature sensors; Alarm sensors; Dewing sensors; Distance sensors; Dummy sensors; Electric current sensors; Electric smoke sensors; Electrical sensors; Electro-optical sensors; Electrochemical gas sensors; Electronic control installations for sensors; Electronic measurement sensors; Electronic pressure sensors; Electronic sensors; Fire sensors; Flame sensors; Fluid level sensors; Gas sensors; Heat sensors; Humidity sensors; Impact sensors; Infrared sensors; Level sensors; Light sensors; Magnetic flux sensors; Magnetic resistance sensors; Magnetic sensors; Measuring sensors; Microwave type intruder sensors; Movement sensors; On-off sensors; Optical fibre sensors; Optical sensors; Oxygen sensors, other than for medical use; Passive infrared sensors; Passive sensors (other than for medical use); Photoelectric sensors; Piezoelectric sensors; Precision sensors being parts of alarm systems; Pressure sensors; Pyroelectric infrared sensors; Remotely controlled cameras and other remotely controlled sensors; Sensor apparatus, other than for medical use; Sensor switches; Sensors (measurement apparatus), other than for medical use; Sensors for measuring wind speed; Sensors for monitoring rooms against unauthorised access; Sensors for monitoring grounds against unauthorised access; Sensors for monitoring buildings against unauthorised access; Sensors for real time data input apparatus; Sensors for real time data output apparatus; Sensors for use in the control of motors; Sensors incorporating optical fibres; Shock sensors; Smoke sensors; Thermal sensors; Ultrasonic sensors, other than for medical use; Vibration sensors