Maelstrom® Stir Plate

$149.99
& Free Shipping Details
+ -

Product details

The first industrial-grade programmable magnetic stir plate designed specifically for yeast starters.

Now includes a Stir Bar Removal Tool!

Breed a Herculean army of yeast for brewing bigger beers than ever before. Powerful rare earth magnets churn through any size starter and never throw a stir bar. Five-speed control adapts to sizes from minute to mammoth, for yeast starters in a 1000ml erlenmeyer flask, all the way up to a 5-gallon carboy.

Command a massive yeast starter while you're at work or over the weekend. Let it run indefinitely, or program up to 48 hours of stir time. Schedule it to settle out yeast just in time to come home and brew.

Watch Maelstrom® surge through starter wort creating a vortex like no other. The transparent body shows the magnets whipping through rotation. Plus, the seamless surface makes for easy cleaning.

Easy to use with an intuitive interface, the Maelstrom® sets the new standard as the most powerful and versatile homebrewing stir plate ever created for the home brewer.

Be sure to check out our Yeast Starter Kits in 1000 ml and 2000 ml sizes. 

*Erlenmeyer Flask not included

Additional information

Support Documents - Instructions Click here for instructions
SKU

40332

Features:

  • Now includes a Stir Bar Removal Tool!
  • Includes a 50mm stir bar
  • Five distinct speeds, from 480-1440 RPM, to accommodate yeast starters up to 5 gallons
  • Scheduling function for up to 48 hours
  • Seamless surface for easy cleaning & maintenance
  • Powerful magnets will never throw a stir bar
  • Translucent body lets you watch the magnets in rotation
  • Standard 12V Power Adapter
  • Large 8" W & x 8 ½" L stirring platform

Customer Reviews

Based on 203 reviews
67%
(137)
19%
(39)
6%
(12)
5%
(10)
2%
(5)
M
MICHAEL K.B.
I ALMOST love this thing...

Works like a dream, once you get it going—you can set it and forget it. It spins its little cyclone and draws delicious oxygen down into the little bird-mouths of your hungry yeast for hours, days, centuries without end. Also, Northern Brewer’s legendary customer service worked exactly as advertised—five stars for Mike, who quickly sent me a new one when I couldn’t get the first one to work, with instructions to send the old one back in the box. HOWEVER...I couldn’t get the second one to work easily either, though I eventually conquered it. As noted in these reviews, the slight but not insignificant design flaw is that the magnet strength (between the flat stir bar and the magnets of the stir plate, separated only by the bottom of your flask) outwrestles the motor, and I never could get either Maelstrom to start from a cold start with a loaded flask on top (1L of yeast+starter in a 5L flask). You can hear it clicking and trying to spin, but it's like a too-light battery-operated drill choking on a **** that's buried in a tough old piece of wood. After a LOT of trial and error I learned I could start the stir plate "empty" then carefully lower the flask (with stir rod pre-centered) and get it to work, once in a great while—usually it 'throws' the rod to the outside and you start over. But I will try the rubber gasket and/or plate spacer solutions mentioned here, which seem to work better. And again, it works GREAT and makes yeast starters a breeze, once you get it going. And the magnetic stir rod retriever is pure genius. Maybe the cheapest solution is to redesign the stir rod to have a lump in the middle, if that's what works?

A
Ashwin C.
Powerful!

Works great overall and stirs up a large vortex even on the lowest speed setting. The large platform is an added bonus as it comfortably supports a 5L Erlenmeyer flask.

The only minor complaint as other users have pointed out is trouble getting the stir bar spinning, but the trick of lifting the flask a few millimeters off the platform while hitting start has been working consistently for me.

Would recommend!

M
Michele B.

I bought this for my husband. When I asked him how he'd review it he gave me a thumbs up because he was playing Monster Hunter and couldn't stop and talk.

P
Paul G.
It stirs real good

I am very happy with the performance of the Maelstrom, the only reason why I did not give it five stars is it has trouble starting from a dead stop sometimes.

T
Tom C.
Overall happy with it.

I needed something to do a large, 4 liter starter. I brew some big beers, like Belgian Quads and Imperial Stouts and needed something to hold my 5 liter erlenmeyer flask. I had a smaller stir plate that I actually had an erlenmeyer flask tip off on one occasion. No chance with this stir plate. The base is large enough that the 5 liter flask fits with room to spare. I do need to mark it down by one star because it could use a stronger motor. When I first got it and tried to do a large starter, the motor couldn't get the magnet to start spinning. You could see it was trying but the motor couldn't seem to overcome the inertia of the large magnet to get it moving.

The solution turned out to be adding a small o-ring on the stir bar. I found a silicone o-ring I had that had a little smaller inside diameter than the stir bar and slid it into the middle of the bar. Now the stir bar sits on two points instead of its entire length and the motor gets the bar spinning no problem.

Easier than returning and getting a new one or refund.

If Northern Brewer actually does read these reviews, this might be a design change you want to incorporate in the future. It could save a lot of headache.

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Maelstrom® Stir Plate

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Customer Reviews

Based on 203 reviews
67%
(137)
19%
(39)
6%
(12)
5%
(10)
2%
(5)
M
MICHAEL K.B.
I ALMOST love this thing...

Works like a dream, once you get it going—you can set it and forget it. It spins its little cyclone and draws delicious oxygen down into the little bird-mouths of your hungry yeast for hours, days, centuries without end. Also, Northern Brewer’s legendary customer service worked exactly as advertised—five stars for Mike, who quickly sent me a new one when I couldn’t get the first one to work, with instructions to send the old one back in the box. HOWEVER...I couldn’t get the second one to work easily either, though I eventually conquered it. As noted in these reviews, the slight but not insignificant design flaw is that the magnet strength (between the flat stir bar and the magnets of the stir plate, separated only by the bottom of your flask) outwrestles the motor, and I never could get either Maelstrom to start from a cold start with a loaded flask on top (1L of yeast+starter in a 5L flask). You can hear it clicking and trying to spin, but it's like a too-light battery-operated drill choking on a **** that's buried in a tough old piece of wood. After a LOT of trial and error I learned I could start the stir plate "empty" then carefully lower the flask (with stir rod pre-centered) and get it to work, once in a great while—usually it 'throws' the rod to the outside and you start over. But I will try the rubber gasket and/or plate spacer solutions mentioned here, which seem to work better. And again, it works GREAT and makes yeast starters a breeze, once you get it going. And the magnetic stir rod retriever is pure genius. Maybe the cheapest solution is to redesign the stir rod to have a lump in the middle, if that's what works?

A
Ashwin C.
Powerful!

Works great overall and stirs up a large vortex even on the lowest speed setting. The large platform is an added bonus as it comfortably supports a 5L Erlenmeyer flask.

The only minor complaint as other users have pointed out is trouble getting the stir bar spinning, but the trick of lifting the flask a few millimeters off the platform while hitting start has been working consistently for me.

Would recommend!

M
Michele B.

I bought this for my husband. When I asked him how he'd review it he gave me a thumbs up because he was playing Monster Hunter and couldn't stop and talk.

P
Paul G.
It stirs real good

I am very happy with the performance of the Maelstrom, the only reason why I did not give it five stars is it has trouble starting from a dead stop sometimes.

T
Tom C.
Overall happy with it.

I needed something to do a large, 4 liter starter. I brew some big beers, like Belgian Quads and Imperial Stouts and needed something to hold my 5 liter erlenmeyer flask. I had a smaller stir plate that I actually had an erlenmeyer flask tip off on one occasion. No chance with this stir plate. The base is large enough that the 5 liter flask fits with room to spare. I do need to mark it down by one star because it could use a stronger motor. When I first got it and tried to do a large starter, the motor couldn't get the magnet to start spinning. You could see it was trying but the motor couldn't seem to overcome the inertia of the large magnet to get it moving.

The solution turned out to be adding a small o-ring on the stir bar. I found a silicone o-ring I had that had a little smaller inside diameter than the stir bar and slid it into the middle of the bar. Now the stir bar sits on two points instead of its entire length and the motor gets the bar spinning no problem.

Easier than returning and getting a new one or refund.

If Northern Brewer actually does read these reviews, this might be a design change you want to incorporate in the future. It could save a lot of headache.