This standard is a consolidation and revision of four individual standards B40.3, Bimetallic Actuated Thermometers, B40.4, Filled System Thermometers, B40.8, Liquid-in-Glass Thermometers and B40.9, Thermowells for Thermometers and Elastic Temperature Sensors. These individual standards provide terminology and definitions, dimensions, safety, construction and installation issues, test procedures and general recommendations.