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Hanna Instruments HI 304N Auto-Reverse Magnetic Stirrer with Tachometer

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Specifications for this item
Number of Items
Overall Height
2.8  inches
Overall Width
7.1  inches
Part Number
HI 304N
Temperature Range
0/50  Degrees Celsius
Item Weight
3.09 pounds
Brand Name
Hanna Instruments
Size Name
110/115 Vac or 230/240 Vac, 50/60 Hz, 4-digit LCD tachometer
Maximum Stirring Speed
1000  RPM
Overall Length
7.1  inches

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Key Features

  • Heavy-duty stirrer
  • Stir in two directions
  • Reverse the direction of the stirring
  • 4-digit LCD tachometer for easy read out
  • Can stir up to 2.15 liters of liquid

Package Details

Shipping Weight: 3.95 pounds
Package Size: 9.9 x 9.7 x 5.8 inches

Product Description

Magnetic 2.5L auto-reverse stirrer with tachometer, stainless steel cover, 110/115V, When stirring a solution, to work with a constant speed (Revolutions Per Minute) is an important factor in ensuring that the best repeatability in test and processes is achieved. Without a tachometer, there is no way of knowing the RPMs. HI 304N is a heavy-duty stirrer with a built-in tachometer.

It is often desirable to stir in two directions in order to achieve maximum homogeneity. An advanced circuit allows HI 304N to reverse the direction of the stirring at user selected intervals. The interval can be adjusted from 30 seconds up to 3 minutes. In addition to the tachometer and precision 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. In some cases this has caused the stirrer 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.

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