From ABER Instruments' range of brewing products and brewing equipment see the COMPACT Product Range.

The COMPACT YEAST MONITORS are designed to be used in real time with live yeast concentrations. The Online COMPACT Range includes the flagship COMPACT YEAST MONITOR, the COMPACT ADAPT and the recently released COMPACT PERFECTPITCH mobile skid.
The COMPACT LAB YEAST ANALYSER is useful for speeding up lab yeast readings.

A typical COMPACT YEAST MONITOR system for online measurements would include the COMPACT YEAST MONITOR, V350 Touch Screen,
and an appropriate Extension cable for your particular brewery.