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

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List Price: $86.00
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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 Name 110/115 VAC; 50/60Hz Power Supply
Temperature Range 0/50  Degrees Celsius
UNSPSC Code 41121800

The Hanna Instruments HI 190M-1 is a magnetic mini stirrer t... Read full product description



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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

Product Details

User Manual [386kb PDF]
  • Item Weight: 1.4 pounds
  • Shipping Weight: 2 pounds (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B002OSX2Q0
  • Average Customer Review: 4.0 out of 5 stars  See all reviews (48 customer reviews)
  • Amazon Best Sellers Rank: #1,527 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
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Frequently Bought Together

Hanna Instruments HI 190M-1 Magnetic Mini-Stirrer with Speedsafe, 110/115 V Power Supply + Bel-Art Scienceware 371100138 PTFE Octagon Spinbar Magnetic Stirrer Bar, with Integral Pivot Ring, White, 1" Length, 3/8" Diameter
Price for both: $92.93

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 Questions & Answers

Customer Reviews

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Most Helpful Customer Reviews

34 of 38 people found the following review helpful By E. Deutsch on December 17, 2009
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.
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20 of 21 people found the following review helpful By customer on July 2, 2011
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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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10 of 10 people found the following review helpful By Jeremy Martens on November 13, 2012
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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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9 of 9 people found the following review helpful By beerman on February 18, 2013
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I bought this for making yeast starters for home brewing. Worked well at first, but then noticed some issues. After several uses, even with the speed set of "off", it's never really turned off, the stir bar would still turn. As soon as I would plug it in with the off position on the dial, you could hear it turning. Then after less than 2 years (maybe used 10 times a year), it has stopped working. I've seen other reviews where people complained it wore out fast.
Lesson learned, you get what you pay for (cheap).
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8 of 8 people found the following review helpful By G. Shea on March 26, 2013
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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6 of 6 people found the following review helpful By G. Mesick on January 2, 2013
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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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5 of 5 people found the following review helpful By Brent on March 21, 2011
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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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10 of 12 people found the following review helpful By Billkr on April 25, 2011
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The description of this item does not mention that it includes a stirring bar with it.
Had I read some of the previous reviews I would have seen that.
Best price I could find for a magnetic stirrer.
I have had this running for about 3 weeks now (almost every day for 30-90 minutes at a time) without any problems.
Having the magnetic stirring bar included with it was an extra bonus.
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