Hanna HI303N Two-Speed Magnetic Stirrer with Tachometer

Description

QC stations and labs must be able to repeat tests and processes. In order to do this, the specifications must be clear at all times. When stirring a solution, the RPMs are a very crucial factor. Without a tachometer, there is no way of knowing the exact RPMs and therefore no way of repeating the process.

HI 303N and HI 313N solve this problem by incorporating an LCD tachometer. These stirrers also allow precise stirring repeatability by using two separate speed ranges. In each range, the speed can be fine tuned for exacting accuracy. This assures maximum repeatability in experiments and processing for laboratory as well as production use. In addition to the tachometer and speed control, a limiter will assure that the maximum speed is never exceeded (Speedsafe). Often, a sample is removed from the stirrer before the speed has been reduced. This can occasionally cause the motor to accelerate until it destroys itself. HANNA stirrers incorporate a VCO device that will stop the motor from accelerating as soon as the load is removed.

In addition to these features, HI 313N also has an automatic feedback feature. The motor is electronically controlled to maintain the chosen speed even as the load changes. If the viscosity or level (fluid weight) increases or decreases, the circuitry will adjust the output power.