BS 1704 Thermometers

BS 1704 : 1985 is identical to ISO 1770 - 1981 (revised in 1983). The specification includes standard thermometers (designation A to H) and thermometers of higher accuracy (designation J to W). Thermometers with ranges below -35°C are red spirit filled. All other ranges are mercury filled and are made of yellow back glass, wherever possible.
The designation reference for partial (75mm) immersion types is suffixed “/75”.

Product Specifications
Product Material: Glass Tube: Mercury filled
(*except ranges below -35°C - Red Spirit filled)
Product Dimension: 6.5mm dia x length (see table below)
Product Net Weight: 305mm - 27.2g
405mm - 35.8g
460mm - 44g
610mm - 49g

Product Data Sheet
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Designation Range  Division  Length mm  Product No
Total Partial Total Imm 75mm !mm
A - *-100 + 30C 1.0 305 *50/121/0 -
B B/75 -35 + 30C 0.5 305 50/122/0 50/142/0
C C/75 -5 +60C 0.5 305 50/123/0 50/143/0
D D/75 -5 +105C 1.0 305 50/124/0 50/144/0
E E/75 -10 +160C 1.0 305 50/125/0 50/145/0
F F/75 -10 +250C 1.0 305 50/126/0 50/146/0
G G/75 -10 +360C 2.0 305 50/127/0 50/147/0
H H/75 -10 +500C 5.0 305 50/128/0 50/148/0
Thermometers of Higher Accuracy
J - *-100 to +50C 1.0 305 *50/129/0 -
K - *-50 to +50C 1.0 305 *50/130/0 -
P P/75 -35 to +50C 1.0 305 50/131/0 50/151/0
R R/75 -20 to +110C 1.0 305 50/132/0 50/152/0
S S/75 -20 to +150C 1.0 305 50/133/0 50/153/0
T T/75 -10 to +260C 1.0 405 50/134/0 50/154/0
V V/75 -10 to +400C 2.0 405 50/135/0 50/155/0
W W/75 -10 to +500C 2.0 405 50/136/0 50/156/0
Fractional Degree Thermometers
L L/75 -1 to +51C 0.1 460 50/137/0 50/157/0
M M/75 -1 to +101C 0.1 610 50/138/0 50/158/0
N N/75 -1 to +201C 0.2 610 50/139/0 50/159/0

 

*Red spirit filled

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