Maximum, minimum and ordinary (i.e. wet and dry bulb) glass-sheathed thermometers suitable for mounting in a louvred screen. Comply with MOD and Meteorological Office requirements (Celsius scale) for worldwide use. Essential dimensions, maximum errors, specification for ethanol in spirit-filled thermometers. Requirements for Fahrenheit scale given in appendix.Cross References:BS 507BS 5750BS 6392:Part 3BS 6392:Part 8