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Hanna Instruments HI 190M-1 Magnetic Mini-Stirrer with Speedsafe, 110/115 V Power Supply

3.6 out of 5 stars 84 customer reviews
| 15 answered questions

Price: $86.00 ($86.00 / Each) & FREE Shipping. Details
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Specifications for this item
Brand Name Hanna Instruments
Part Number HI 190M-1
Number of Items 1
Capacity 1
Inside Depth 1.8  inches
Item Weight 1.41 pounds
Maximum Stirring Speed 1000  RPM
Overall Height 1.8  inches
Overall Length 4.8  inches
Overall Width 4.8  inches
Size 110/115 VAC; 50/60Hz Power Supply
Temperature Range 0/50  Degrees Celsius
UNSPSC Code 41121800
Volume 0.02  milliliters

The Hanna Instruments HI 190M-1 is a magnetic mini stirrer t... See more product details


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Product Features

  • HI 190M-1 magnetic mini stirrer with magnetic mini-stir bar, and built-in Speedsafe speed limiter control, not to exceed 1,000 revolutions per minute (rpm), even when sample container is removed
  • Unit speed range of 100 to 1,000 rpm, and 1 liter (.26 gallons) maximum stirring capacity
  • Overall dimensions are 45 x 120 x 120 mm/1.8 x 4.8 x 4.8 inches (H x W x D), stir bar is 25 x 7 mm/ 0.98 x 0.28 inches (L x W), and the instrument weighs 640g (1.4 lb.)
  • Comes with a plastic, chemical-resistant [acrylonitrile butadiene styrene (ABS)] cover
  • Meets International Organization for Standardization (ISO) 9001 standards, and comes with a one-year limited warranty

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Product Details

User Manual [386kb PDF]
  • Item Weight: 1.4 pounds
  • Shipping Weight: 1.8 pounds (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • ASIN: B002OSX2Q0
  • Item model number: 8613M10EA
  • Average Customer Review: 3.6 out of 5 stars  See all reviews (84 customer reviews)
  • Amazon Best Sellers Rank: #4,743 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

Frequently Bought Together

  • Hanna Instruments HI 190M-1 Magnetic Mini-Stirrer with Speedsafe, 110/115 V Power Supply
  • +
  • Scienceware 371100118 PTFE Octagon Spinbar Magnetic Magnetic Stirrer Bar, with Integral Pivot Ring, White, 1-1/8" Length, 5/16" Diameter
Total price: $94.80
Buy the selected items together

Product Description

The Hanna Instruments HI 190M-1 is a magnetic mini stirrer that comes with a magnetic mini-stir bar, and has an internal Speedsafe control mechanism to assure maximum speed of no more than 1,000 revolutions per minute (rpm), even when the sample container is removed. Speed range of the unit is 100 to 1,000 rpm, and maximum stirring capacity is 1 liter (.26 gallons). The device comes with a plastic, chemical-resistant acrylonitrile butadiene styrene (ABS) cover, and works with a 110/115V power supply. Overall dimensions are 45 x 120 x 120 mm/1.8 x 4.8 x 4.8 inches (H x W x D). The stir bar is 25 x 7 mm/ 0.98 x 0.28 inches (L x W), and the instrument weighs 640g (1.4 lb.). The stirrer comes with a one-year limited warranty. This magnetic stirrer is used by researchers, professionals, and hobbyists to stir a variety of liquids and solutions in chemistry, food and beverage, pulp and paper, lab, and home applications.

Researchers, professionals and hobbyists use a magnetic mini stirrer to stir a variety of liquids and solutions in chemistry, food and beverage, pulp and paper, lab, and home applications. Magnetic stirrers have a rotating magnetic field that causes a stir bar, immersed in liquid, to spin and stir the liquid. A magnetic stirrer is quieter, and more efficient than a motorized stirrer, and has no moving external parts that could break or wear out. Because of its small size, a stirring bar is more easily cleaned and sterilized than manual stirring devices, and does not require lubricants which can contaminate the reaction vessel and the product.

Hanna Instruments manufactures analytical instrumentation and supplies, including pH meters, electrodes, chemical reagents, and buffer solutions. The company, founded in 1978 and headquartered in Woonsocket, RI, meets International Organization for Standardization (ISO) 9001 standards.

Customer Reviews

Top Customer Reviews

Verified Purchase
The Hanna Instruments HI 190M-1 Magnetic Mini-Stirrer with Speedsafe, 110/115 Vac Power Supply units are a great bargain compared to stirrers from scientific supply companies - maybe 5-10x cheaper. They work well for light duty lab stirring. However, they have a finite lifetime. I use them continuously to stir cultures, and usually after no more than a year or so they start varying in speed and intermittently stopping, and eventually stop altogether. I've had 3 die on me so far, and I assume all will go that way eventually. However, I can buy at least 5 spares for the price of one more reliable heavy duty stirrer which also is bulkier, so it's a reasonable tradeoff.
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Verified Purchase
The ad doesn't tell you that it comes with a (1" x 3/8") Teflon-coated stirring bar. I was going to order some from Amazon but the shipping was several times the cost of the stirring bar, so I ordered from Cole-Parmer for less. Then I found I didn't really need to order any, but I am glad I got slightly larger ones anyway. Also, this is a small stirrer--look at the beaker that is on it (500-mL?). In fact, the box says "Mini stirrer," though the ad does not mention this. But it is working very well for my purpose, which is dissolving shellac in alcohol for classical guitar finishing by French polishing. Beware that the tracking information provided by Amazon (and I am NOT talking about the estimated delivery date) is meaningless: They may say it has been delivered even if it has not and their customer-service people will just keep telling you that the estimated delivery time is only approximate.
4 Comments 37 of 43 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Verified Purchase
I purchased this item to make yeast starters in my home brewery. It is the perfect size for a 2 liter or smaller flask, and i can run the unit full speed without loosing the magnet. It seems sturdy and well built, i've used it at 5 times already and seems to work like a champ. My only complaint is the hums a little even when turned off, so i just unplug it.
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Bought one of these for home-brew yeast starters. Worked great for about 10 batches then the motor died. I'm not happy I spent $80 on this junk.
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Verified Purchase
This is just what I wanted and expected. It is small, but there is plenty of room on the base for a 2 liter Erlenmeyer flask. It comes with the stirring magnet (so no need to buy one separately), and the speed control is precise enough for you to get it right. It does its thing for 24 hours straight without a strain.

If you are considering a stir plate for home brewing, this will do the trick at a reasonable price.
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Our lab has purchased about 15 of these units with various brand names on them over the past 15 years. The last 6 or 7 have been from Hanna. Earlier units would last 3-5 years of moderate use, but in the last year we've trashed 4 of our Hanna units that were 6 months to 2 years old.

They are small and convenient for as long as they work, and may do fine for occasional use. But eventually the motor will slow down and then fail to start up at all. Sometimes they can be revived by shooting a solvent through the speed controller but it doesn't last for long after that.

At this point, despite the low price of this Hanna unit, it will be economical for us to start buying better units at 3-4 times the price and have them last longer.
1 Comment 16 of 20 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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By Brent on March 21, 2011
Verified Purchase
I use this magnetic stir plate for yeast starters for all of my homebrewing; especially the higher gravity brews. It works quietly and is perfect for the job.
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Verified Purchase
The stirrer works fine, but the unit will struggle to start if the medium is thick (in other words the unit needs to be already spinning when the solution is added).
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