Liq. pollution measuring appts. - operates solvent rinsing and calibrating cycles before counting particles in given vol. of liq.

摘要

The device operates in five phases. Solvent from a reservoir (11) is decanted into a chamber (9) from where it is forced by pressurised air from a source (10), to counter flow through read head (3) to rinse it clear of particles from a previous reading. The solvent is filtered (26) and collected in receptional (22) to be used again. Preference liquid is placed on magnetic stirring input (39) and applied, again under force of pressurised air delivered along conduit (32) to the read head (3) in which is thereby calibrated. Now the head (3) is re-rinsed and the liquid to be measured for pollution is introduced through the first circuit after which the cycle may be repeated.