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Home General Laboratory Products Magnetic Stirrers Auto-Reverse Magnetic Stirrers


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Auto-Reverse Magnetic Stirrers

HI 312N is a powerful stirrer that stirs up to 5.0 liters (1.3 gallons). The HI 302N model can stir up to 2.5 liters (0.66 gallons). It is often desirable to stir your samples in two directions. This will achieve maximum homogeneity and solubility.
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Item Listing Full Description Specifications Journal Articles
Item# Description
721988 Auto-Reverse Magnetic Stirrer with Stainless Steel Cover, HI 302N/D, 220/240 VAC
721987 Auto-Reverse Magnetic Stirrer with Stainless Steel Cover, HI 302N/U, 110/115 VAC
721990 Auto-Reverse Magnetic Stirrer with Stainless Steel Cover, HI 312N/D, 220/240 VAC
721989 Auto-Reverse Magnetic Stirrer with Stainless Steel Cover, HI 312N/U, 110/115 VAC

For local pricing, contact your nearest distributor.



Full Description Back to Top


HI 312N is a powerful stirrer that stirs up to 5.0 liters (1.3 gallons). The HI 302N model can stir up to 2.5 liters (0.66 gallons). It is often desirable to stir your samples in two directions. This will achieve maximum homogeneity and solubility.
An advanced circuit allows HI 302N and HI 312N to reverse the direction of the stirring at a user selected interval. The interval can be adjusted from 30 seconds up to 3 minutes.
In addition to precision speed control, a limiter will also assure that the maximum speed will never be exceeded.
During repeated testing, samples are often removed from the stirrer before the speed is reduced. This could cause the motor to accelerate until it destroys itself. Hanna stirrers incorporate a VCO device that stops the motor from accelerating as soon as the load is removed (Speedsafe).
In addition to these features, HI312N also has an automatic feedback feature. The motor is electronically controlled to maintain the chosen speed as the load changes. If the viscosity or the level (fluid weight) increases or decreases, the circuitry will adjust the output power.
• Auto-Reverse: These stirrers will change stir direction at
a user selectable interval adjustable from 30 seconds to 3 minutes.
• Automatic Feedback: HI 312N includes an exclusive device that will maintain a constant speed as the load varies (due to increased or decreased viscosity or volume).
• Stirring Capacity: HI 302N stirs up to 2.5 liters (0.66 gallons) and HI312N stirs up to 5.0 liters (1.3 gallons).
• Chemical Resistance: The AISI 316 stainless steel cover offers excellent protection from most harmful chemicals in the lab.
HI 302N and HI 312N are supplied complete with a 50mm (2 in) long (dia. 7mm/0.3 in) PTFE coated magnetic stir bar and instruction manual.


Specifications Back to Top

Specifications721988721987721990721989
Maximum Stirring Capacity Metric2.5 L2.5 L5 L5 L
Maximum Stirring Capacity English0.66 Gal0.66 Gal1.3 Gal1.3 Gal
Minimum Speed Range100 rpm100 rpm100 rpm100 rpm
Maximum Speed Rang800 to 1,000 rpm800 to 1,000 rpm800 to 1,000 rpm800 to 1,000 rpm
Reverse Interval30 secs to 3 mins30 secs to 3 mins30 secs to 3 mins30 secs to 3 mins
Auto-Feedback  StandardStandard
Power Supply220/240 VAC110/115 VAC220/240 VAC110/115 VAC
Installation CategoryIIIIIIII
Cover MaterialAISI 316 Stainless SteelAISI 316 Stainless SteelAISI 316 Stainless SteelAISI 316 Stainless Steel
Environment0 to 50C (32 to 122F); RH 95%0 to 50C (32 to 122F); RH 95%0 to 50C (32 to 122F); RH 95%0 to 50C (32 to 122F); RH 95%
Dimensions Metric180 x 180 x 70 mm180 x 180 x 70 mm180 x 180 x 70 mm180 x 180 x 70 mm
Dimensions English7.1 x 7.1 x 2.8 in7.1 x 7.1 x 2.8 in7.1 x 7.1 x 2.8 in7.1 x 7.1 x 2.8 in
Weight Metric1.6 kg1.6 kg1.6 kg1.6 kg
Weight English3.6 lbs3.6 lbs3.6 lbs3.6 lbs

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