Stir-Plate 2000 Magnetic Stir Plate

Built with PWM Technology - PWM (Pulse Width Modulation) technology is a better solution than a regulator based controller - PWM allows better motor speed control with less wasted energy. This means no heat from the box that could raise your yeast culture temperature higher than expected. PWM also translates into better speed regulation and a product that starts better and is less likely to stall at slow speeds. Low Power Consumption - PWM also means less power consumption. Regulator based designs waste a lot of energy - if the speed control set to half, 1/2 the energy is used to drive the motor while 1/2 the energy is turned into waste heat. And if the speed control set to one quarter, 1/4 the energy is used to drive the motor while 3/4 the energy is turned into waste heat. With a PWM system, power is fed to the motor in varying widths of full-on - full-off pulses. For 1/2 speed, the pulses are 1/2 on & 1/2 off. For quarter speed, the pulses are 1/4 on & 3/4 off. And because power is always all the way on or all the way off with PWM, there is no waste heat. External DC Power Supply Included - By using a UL approved external plug-in DC power supply, we moved one more potential source of heat away from your yeast starter. This also makes the power supply user replaceable in the unlikely case that it should fail. Professionally Designed - All of our controller cards are professionally designed using state of the art PCB design and layout software. Professionally Manufactured - Built on commercial quality double sided 0.062" FR4 PCB's with 1 ounce copper and full solder mask on both sides. The same quality construction you will find in any high-end electronics equipment. 100% Tested Product with a 10% sample subjected to a 24 hour run-in. As of 12/18/09, we've had zero run-in test failures. All of our units are tested with 2000 ML Borosilicate Glass Erlenmeyer Flasks of water before shipping.