What is the difference between digital control vs. analog control?
• Having a digital control panel provides numerous advantages.
First, the microprocessor continuously monitors the heating and stirring functions to ensure uniformity, precision and repeatable results. Then, it will be possible to use optional temperature probes to directly control the temperature of the sample. Furthermore, in the more advanced models, it will be possible to display a whole series of options and messages that are not possible in an economic model.
• Analog control is simple and reliable. The two knobs control the heater power (temperature) and the motor (speed) of the unit. Some safety lights help you understand when the tool is working or the plate is hot.
What type of Guardian top plate material is right for the lab?
Guardians can be fitted with a ceramic soleplate, ceramic coated steel, aluminum or resin – each material has its advantages.
• Ceramic: they are resistant to chemical agents and therefore safer when working with corrosive chemicals. Furthermore, they can withstand higher temperatures, up to 500°C. The white surface of a ceramic/ceramic-coated plate is preferable for quantitative chemistry analyzes or where clear visibility of the color of the sample is required. CAUTION: The sides of the ceramic soleplate may not be as hot as the center and should therefore be avoided for applications where uniform heating is required.
• Aluminium: they offer a uniform temperature and do not risk cracking or chipping, lasting over time against various improper or accidental uses. Even the ceramic-coated steel version offers a uniform temperature.
Conversely, aluminum plates can support a lower maximum temperature than all-ceramic plates.
• Resin: only for magnetic stirrers, it is durable and resistant to chemical agents. Brilliant white, it gives you clear visibility of your sample. As with aluminum, this material is highly resistant to wear.