Air analysis apparatus; scales; weighing machines; weighbridges; surveying apparatus and instruments; inductors [electricity]; furniture especially made for laboratories; precision measuring apparatus; measuring instruments; weighing apparatus and instruments; pressure indicators; balances [steelyards]; teaching apparatus; precision balances; flowmeters; thermo-hygrometers; height measuring instruments; piezoelectric sensors; gravimeters; automatic ion exchange chromatography apparatus for laboratory use; drying ovens for laboratory use; pressure recorders; high-pressure manometers; glass driers for laboratory purposes; gas pressure indicators; meters; pressure sensors; touchscreen sensors; optical sensors; sensors for determining velocity; test weights; strain gauges; testing instruments; measuring apparatus for temperature and humidity levels in gases and solid substances; motion sensors; sensors for vehicles; mass flow sensors; tyre pressure sensors; sensors for measuring; sensors.