This Standard is confined to analog, liquid in- glass Industrial type thermometers for Industrial Applications that sense process temperature by means of the expan-sion of the liquid within the glass thermometer bulb.The liquid fll, based on the temperature to be measured,may be mercury or organic liquid. This Standard does not include laboratory type ASTM thermometers (Speci-fication Designation: ASTM E 1-86).
NOTE: Thermowell Standard ASME B40.9 does not include dimen-sional infomation or drawings for the intemaly iapered themowell descrbed in this Standard. This inemally tapered thermnowell has been in coninuous use since 1927. The dimensional infommation listed is to be considered critieal t insure interchangcabdity within the industry. for both new and existing thermometers.
