Rangefinder Hydrometers are suitable for less accurate readings and are frequently used to help select the appropriate hydromter for subsequent accurate determinations.
Material: Soda glass, steel shot ballast, synthetic wax resin
Weight: 42 gm
Accuracy: +/- 0.01 - 0.02 deg.
Bulb diam: 12 - 19mm
Supplied in a protective, resealable plastic tube