Acidity sensor assemblies; Air temperature sensors; Alarm sensors; Distance sensors; Dewing 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; Fibre optical 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; Mass flow sensors; Measuring sensors; Movement sensors; Oil-water level sensors; On-off sensors; Optical fibre sensors; Optical sensors; Optical speed 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 electronic control apparatus; 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 engines; Sensors for measuring depth; Sensors for measuring speed; Sensors for measuring wind speed; Sensors for real time data input apparatus; Sensors for real time data output apparatus; Sensors for use in the control of engines; Sensors for use in the control of motors; Sensors for use with machine tools; Sensors in the form of panels containing fibre optic cable; Sensors incorporating optical fibres; Sensors used in meteorology; Synchro sensors; Temperature sensors (thermostats) incorporating bi-metallic discs; Temperature sensors (thermostats) incorporating expansion rods; Temperature sensors for industrial use; Temperature sensors for scientific use; Test instruments for temperature measuring sensors; Thermal sensors; Thermal sensors (thermostats); Ultrasonic sensors, other than for medical use; Vibration sensors