Timer-controlled magnetic stirrer with auto-feedback speed holding, 5 litre capacity and 100–1000 rpm. 115 V.
HI324N-1
The largest of the Hanna stirrers at 5 litres, and the only one that runs to a clock. A set stirring time makes a step repeatable across operators and shifts: a preparation stirred for exactly fifteen minutes every time is a controlled variable, while one stirred until somebody remembers to switch it off is not.
That is the difference between a stirrer and a documented method. Where a procedure specifies a mixing time — dissolution studies, standard preparation, anything written to a protocol — the timer is what makes the specification real.
Auto feedback is fitted as standard and holds the set speed as load changes. Without it, a solution that thickens as a solid dissolves slows the bar, and the actual rpm at the end of a run is not the rpm that was set at the start. With it, the drive compensates and the set point is the speed throughout — which is what makes a timed run comparable to the last one.
| Specification | Value |
|---|---|
| Maximum stirring capacity | 5 litres |
| Speed range | 100 to 800–1000 rpm |
| Auto feedback | standard |
Catalog HI324N-1, 115 V. The 5 litre capacity also makes this the model to specify when the vessel is a large beaker or a carboy rather than a flask.