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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

By Hanna Instruments
4.0 out of 5 stars  See all reviews (44 customer reviews)

List Price: $86.00
Price: $77.22 & FREE Shipping. Details
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Specifications for this item

Overall Height
1.8  inches
Inside Depth
1.8  inches
Overall Width
4.8  inches
Part Number
HI 190M-1
Item Weight
1.41 pounds
Brand Name
Hanna Instruments
Capacity
1
Number of Items
1
Temperature Range
0/50  Degrees Celsius
Size Name
110/115 VAC; 50/60Hz Power Supply
Maximum Stirring Speed
1000  RPM
Overall Length
4.8  inches


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 (44 customer reviews)
  • Amazon Best Sellers Rank: #2,947 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 + SEOH 2L Narrow Mouth Erlenmeyer Flask with Heavy Duty Rim 1/pk
Price for all three: $103.67

These items are shipped from and sold by different sellers.

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

4.0 out of 5 stars
(44)
4.0 out of 5 stars
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Most Helpful Customer Reviews
34 of 37 people found the following review helpful
5.0 out of 5 stars It comes with a stirring bar 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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18 of 19 people found the following review helpful
3.0 out of 5 stars Hanna Instruments HI 190M-1 Magnetic Mini-Stirrer July 2, 2011
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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10 of 10 people found the following review helpful
2.0 out of 5 stars Durability problems July 17, 2012
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.
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9 of 9 people found the following review helpful
4.0 out of 5 stars Great for making yeast starters November 13, 2012
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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7 of 7 people found the following review helpful
2.0 out of 5 stars short life span March 26, 2013
By G. Shea
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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7 of 7 people found the following review helpful
1.0 out of 5 stars Poor Quality February 18, 2013
By beerman
Verified Purchase
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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6 of 6 people found the following review helpful
5.0 out of 5 stars Works great for home brewing January 2, 2013
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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5 of 5 people found the following review helpful
3.0 out of 5 stars I am not a professional scientist but... March 18, 2013
By Brice
Verified Purchase
I can tell that this is not a high quality mixer...but I didn't pay $500.00 to get one of those now did I?
This only comes with one tiny little magnetic stirring pill.
It works. For how long? I don't know.
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Most Recent Customer Reviews
5.0 out of 5 stars right Time, right place, Finished and ready to work.
This was perfect for my projects and I will recommend this unit to others.
Great piece of equipment for the price.
Published 12 days ago by Thomas Forster
5.0 out of 5 stars Works great for homebrewing
Works well for creating a yeast starter for homebrewing. Nothing gets your brew going like turning your packet of yeast into 200 billion of the critters before throwing them in... Read more
Published 1 month ago by Gregory L. Mahan
4.0 out of 5 stars Nice basic setup
This does the job pretty well. The only thing that I am not fond of is that it does not have a true off switch, it just has speeds though the green "power" light is always... Read more
Published 2 months ago by Justin Dixon
5.0 out of 5 stars Hanna model 190M mini-stirrer used to make colloidal silver.
I use the Model HI 190M Mini-Stirrer to make gallon and half gallon batches of colloidal silver (CS), stirred with the 1" magnetic stirring bar at a low to medium speed. Read more
Published 2 months ago by Scott Dennison
5.0 out of 5 stars This is a great little Mini-Stirer
This is a great little mini magnetic stirrer. My daughter used it for her 8th grade science fair project and it was the perfect size and complement to her experiment. Read more
Published 3 months ago by Mommaratzi
5.0 out of 5 stars Happy with purchase
Had to get a magnetic stirrer for my son's science experiment. The price on this smaller version was fair compared to other websites, including used items from eBay. Read more
Published 4 months ago by ALFinVB
2.0 out of 5 stars Very low quality
The unit I purchased smokes occasionally and the plastic plate has melted in places due to low build quality and lack of proper shielding.
Published 4 months ago by Tate Eubanks
5.0 out of 5 stars Fine quality instrument that does exactly what it says
Happy with my stirrer...got it from amazon at a better price than local homebrew shops. I'm using it to make yeast starters for beer. Read more
Published 5 months ago by ravi_2001
1.0 out of 5 stars Only Lasted 4 months
I purchased this in hopes it would last a year. After only 4 months with maybe 30 hours of use on it it stopped working. After 2 months it started to make some noise. Read more
Published 5 months ago by Jeremiah J Rempel
4.0 out of 5 stars Worked great!
Good quality item. It is as simple to use as it gets. the variable speed adjustment works well to get the desired result.
Published 5 months ago by Robert T. Word
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