BS 691:1987

Committees responsible
Foreword
1 Scope
2 Temperature scales
3 Type of thermometer
4 Scale ranges and scale intervals
5 Materials
6 Manufacture
7 Scale lines and figuring
8 Permanence of pigment
9 Maximum permissible errors
10 Dimensions
11 Influence of immersion time
12 Inscriptions
13 Accompanying slip
Appendix A Determination of the average zero point
     depression
Appendix B Deleted
Appendix C Deleted
Figure 1 - Examples of preferred style of graduation
     and numbering
Figure 2 - Examples of graduation showing the position
     of the scale lines relative to the enlarged image
     of the mercury column where L is less than 0.5 T
Figure 3 - Maximum bulb diameter
Table 1 - Requirements for thermometer types
Table 2 - Size of sample
Publications referred to

Dimensional limits, materials, errors, graduation and inscription. General purpose, subnormal range, and ovulation thermometers °C; and dual-scale (°C and °F) general purpose thermometers. Gives wording for accompanying slip to be distributed with the thermometers. Complements BS 6985.