Hydrometers

Hydrometers are instruments that measure the specific gravity or relative density of a liquid in relation to water. Hydrometers are typically constructed of a glass cylindrical tube complete with a weighted bulb that floats in liquid.

To operate the hydrometer, you place it in the liquid and take a reading from where the hydrometer breaches the surface. This reading will give you the specific gravity of the water. In high density liquids the hydrometer will float much higher than in low density liquids.

Specialised variants are available depending on their application. For example, a lactometer is used to check the purity of dairy products whereas an alcoholmeter indicates the alcoholic strength of a liquid (where water and alcohol have been mixed).

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Description Price Maximum Specific Gravity Minimum Specific Gravity Resolution Scaling Length
RS Stock No. 196-8187
BrandRS PRO
HK$226.61
Each
units
- - - - -
RS Stock No. 380-5038
Mfr. Part No.10/501/0
BrandBrannan
HK$135.52
Each
units
1°SG 0.8°SG 0.002 SG Yes 250mm
RS Stock No. 196-8193
BrandRS PRO
HK$492.84
Each
units
- - - - -
RS Stock No. 380-5072
Mfr. Part No.10/404/0
BrandBrannan
HK$148.83
Each
units
1.1g/ml 1g/ml 0.002 g/ml Yes 250mm
RS Stock No. 380-5044
Mfr. Part No.10/502/0
BrandBrannan
HK$141.28
Each
units
1.2°SG 1°SG 0.002 SG Yes 250mm
RS Stock No. 380-5050
Mfr. Part No.10/503/0
BrandBrannan
HK$141.28
Each
units
1.4°SG 1.2°SG 0.002 SG Yes 250mm
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