SURFACE TENSION BALANCE, SEARLE’S
PR-67
This Searles Surface Tension Balance can be used to demonstrate the surface tension of a liquid by allowing it to be shown on a graduated scale.
A horizontal frame is mounted on a rod fitted to a base & carries a steel wire stretched across it, the tension of which can be adjusted by a tightening screw.
A light metal pointer with a counterpoise is attached to the centre of the wire clamp.
A pan is hung from a notch in the pointer and has a hook at its underside from which can be suspended a light weight rectangular frame or a metal clip to hold a micro slide edge.
The tip of the pointer moves over a graduated scale.
It is supplied complete with a rectangular wire frame, slide clip, six micro slides & 3 meters of spare wire.