Mophorn Heating Mantle 1000ml Magnetic Stirrer Heating Mantle 350W Heating Mantle Magnetic Stirrer 0-1600 RPM Lab Heating Mantle for Liquid Heating 1000ml
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Availability:
18 left in stock
Arrives
Monday, Oct 13
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Style: 1000ml
Features
- Product Parameter: Stirring volume: 1000ML; Heating power: 350W; Maximum temperature: 450 C, Stirring speed: 0 ~ 1600 R / MIN, Frequency: 60Hz.
- Premium Quality: High-temperature resistance fiberglass is used as insulation materials, resistance wire of nickel-chrome material is sealed in the insulation layer and weaved into semisphere internal heater.
- Dual Function: Electronic heating regulation mode and magnetic stirring feature large heating area, fast warm-up, high-temperature evenness, and adjustable heating power.
- Excellent Performance: Magnetic stirring mantle adopts step-less speed operation, able to achieve stable, precise stirring to the liquid solution within a wider speed scope, especially in the experiments of samples with small volume.
- Multiple Application: Ideal equipment for liquid heating and stirring used in the chemical, sanitary field, environment protection, biochemistry, experimental analysis, and education & research development field.
Is Discontinued By Manufacturer : No
Product Dimensions : 11.8 x 11.8 x 9.8 inches; 7.8 Pounds
Date First Available : December 16, 2016
Manufacturer : Mophorn
Country of Origin : China
Best Sellers Rank: #148,526 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #17 in Lab Heating Mantles
#17 in Lab Heating Mantles:
Customer Reviews: 3.9 3.9 out of 5 stars 188 ratings
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If you place your order now, the estimated arrival date for this product is:
Monday, Oct 13
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Top Amazon Reviews
Style: 1000ml
I like that this is a proper heating mantle. No more oil baths or heat element sunk into sand for me! The problem is the stirring, it's not properly centered into the mantle. Furthermore, the rotor magnet isn't very strong. These problems, combined with the fact that my magnetic stir rods are off center, makes it impossible for things to stay synced at anything but idle pace. Other than that it's a solid performing unit. It's a little larger than I was expecting though. My 1L round bottom flask has about one and a half inches of space all around it. Could be that my flask is on the small side for 1L, could be that it's by design. I'd prefer a "fit like a glove" sizing, but I guess that's unlikely, and I keep getting told that it's OK anyway. Whatever, it's definitely an upgrade from what I had, but I feel like I could/should have spent a little more on a better unit. Edit: I discovered today that at least part of the problem was that I wasn't using the proper egg shaped stir bars. So I've added a star. After solving that problem, I set out to solve the off center stir problem. Fortunately there are just 3 screws on the bottom that hold the thing together. First thing I found was that the two magnets are being held in place with a piece of ferromagnetic material bridging across them. This created a "magnetic short circuit" of sorts, significantly reducing the "reach" of the stir mechanism's magnet. I replaced this tiny piece with a similar shaped piece of FR4 circuit board. Hard to tell how much that helped, but it couldn't have hurt. Second. Indeed, the hole that was cut for the stir motor was visibly off center from the rest of the device. nothing I could do about this existing hole, but I could do something about how the motor sat in it. I loosened the screws holding down the stir motor then cocked the motor as hard toward the center as I could manage, and while holding, tightened the whole thing down again. After that I tweaked the motor bracket some to make it even straighter and closer. This worked pretty good and got the stir center much closer to the center of the mantle. Being that it's a hemisphere, the center of the mantle is the lowest part, and therefore the shortest distance to the stir motor's magnet. Since the magnet in the stir has limited reach, this detail is critically important. It's at this point that I'm able to whip up a whirlpool in my round bottom without tossing the stir bar out of sync, which is the limits of what such a system should do any way. I consider it fully functional now, but, since I had to mod it, I'm taking off a star still. Most buyers won't be interested in moding a mains voltage electronics device that is constantly close to conductive liquids, so I think this is fair.
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Reviewed in the United States on October 28, 2022 by Charlie
Style: 1000ml
Just facts that I have discovered about this product. 1. The temperature control knob. You turn the knob clockwise until you feel or hear a CLICK. The heater should be ON. In fact it is NOT. In my case I had to turn the knob further clockwise until I reached about 30-40 percent of the MAX knob setting before I could get ANY heat from the mantle. At that point, as the mantle "turned on" (at the 30-40 percent mark), the heat output from it was quite hot. About 90 WATTS hot. I measured it. 40 OHM heating element, 60VAC(volts AC). The control triggers ON at about 60VAC. So... you have to deal with about 90 WATTS minimum. 90 WATTS will get water to boil. That's a LOT of heat. If you need to control the temperature to any point lower than that, you can't. Well you technically can, but it's a guessing game. Once the mantle is turned ON (30-40 on the knob...), you CAN turn the temperature control knob counterclockwise a small amount to lower the output temperature, but you will have no indication as to whether or not you've backed off too much. The temperature could be lower, or it could be OFF. I've measured a minimum range from 90 WATTS(starting) down to 13 WATTS. You MUST go to the 90 WATTS before you can back it off to 13 WATTS. If you back off to less than 13 WATTS, the unit will shut off and then you MUST GO BACK to 90 WATTS before you back off to 13 WATTS again! WHAT ??? I think this unit was designed for 220VAC and left mostly unchanged for the American market. While it technically does work at 120VAC, it doesn't perform very well. Perhaps a simple change of a resistor value could make this a very nice product. 2. The magnetic stir knob. Turn it clockwise until the "click". It spins at a higher minimum RPM than I like. It is a DC motor. Not much low-speed control. Other than that it works just fine. 3. Mechanically it's put together well enough. For the cost, it is a solid platform for sure. 4. The basket that holds a 1000ml Round Bottom Flask works just fine. SUMMARY: If you need precise control of lower temperatures, this will NOT work for you.
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Reviewed in the United States on November 3, 2020 by Lisa Davis
Style: 2000ml
My first impression upon opening the box was that this was of a higher quality than I expected. The unit has a solid base that has the heft I would typically associate with quality materials. The stand arm for the probe was surprisingly high quality in terms of materials and machining quality. On that note, the only gripe I have about the product is that the clip on the end of the arm that holds the probe is not corrosion resistant and after three uses is badly corroded. I have learned to deal with it. Otherwise I tested by bringing 2 liters of distilled water to a boil, which happened between 95 and 100 Celsius. It should be exactly 100 to boil water but I saw some small signs of boiling around my stir bar starting at 95 Celsius. I have used it three times now and the temperature has been accurate each time. Word of warning for those of you like me, there are true round bottom flasks, and there are round bottom flasks with a flat bottom. The flat bottomed one is a little bit of a hassle to get the stir bar working in, but it is doable. I would suggest getting a true round bottom flask and this should solve the issue. Bottom line, I would recommend this product for anyone needing a stirring heating mantle and is on a budget.
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Reviewed in the United States on February 16, 2022 by Kindle Customer
Style: 2000ml
I love it except you have to have the probe attached to work. I invested in a calibrated thermometer.
Reviewed in the United States on May 13, 2023 by Jessie Pelletier