902511 Thermometers and pyrometers, not combined with other instruments: Liquid-filled, for direct reading:
902519 Other: Thermometers and pyrometers, not combined with other instruments
902520 Barometers, not combined with other instruments
902580 Other instruments (Hydrometers, Pyrometers, Hygrometers and Psychrometers)
902590 Parts and accessories (Hydrometers, Pyrometers, Hygrometers and Psychrometers)