OHAUS GUARDIAN SERIES

Heating plates and stirrers for laboratory and teaching

THE COMPLETE LAB SERIES

With the Guardian Series, it's really easy to find the hotplate and stirrer you need.
The two new series, Guardian 2000 (basic analog) and Guardian 3000 (digital), complement the existing Guardian 5000 (advanced) and Guardian 7000 (sophisticated), allowing you a convenient and tailored choice for your laboratory.
In all, 20 models of hotplates and stirrers that will assist you in your daily work in the laboratory and in educational environments. Get informed and choose comfortably thanks to our comparative guide.

Want to get straight to the point? Download the Ohaus comparison guide.

Guardian 2000
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Guardian 3000
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Guardian 5000
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Guardian 7000
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BEFORE CHOOSING THINK ABOUT WHAT YOU NEED

Think carefully about which laboratory instrument you need and why. Making a local mind of your needs will help you choose your product carefully, saving money and being more satisfied. Here are some of the most frequently asked questions from our customers.

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.

What security features are built into the Guardian Series?
• All models with heating are equipped with an indicator light to warn the user that the surface of the plate is hot (over 40°C), remaining on even after the instrument is switched off. This simple and important feature will help prevent accidents in any laboratory, especially academic ones.
• Guardian 2000 models are equipped with overheating protection: automatically, the heating will switch off if the temperature exceeds the limit.
• Guardian 3000, 5000 and 7000 series hotplates has an additionally feature SafetyHeat™, a sensing system that uses two independent safety controls to monitor the electronics and shut down heating before overheating occurs. This important feature protects the sample, the user and the laboratory by preventing accidents that occur due to a
overheating.
• To adjust stirring and temperature, in Guardian 3000, 5000 and 7000, you must first press the knob; this step provides an extra layer of security by ensuring that the operator is the one making a setting change. In the simpler Guardian 2000, the knob can also be turned unintentionally.
• All Guardian Series models are constructed of chemical resistant materials and are easy to clean, thanks to the special design that channels spills. Additionally, the Guardian 5000 and 7000 Series models are built with the SmartHousing™ system, which leaves the facility at room temperature even at high temperature settings.

Guardian Series Comparison Chart.
For the complete table, with technical data, download the Ohaus comparison guide.

Do you want to know our prices? Here you can find the whole Guardian series.

THE VIDEOS OF THE GUARDIAN SERIES

Guardian 2000
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Guardian 3000
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Guardian 5000
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Guardian 7000
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BEAUTIFUL THE GUARDIAN SERIES, ISN'T IT?

Not convinced? Would you like alternatives? We have them!
Take a look at the heating plates and magnetic stirrers page, you will find, in addition to Ohaus, the models of Velp, a successful Italian company that produces exceptional products. To find out more, we invite you to read the post 'NEW AREC SERIES, VELP', dedicated precisely to the new stirrers and heaters of this company.

And if you are still in doubt, contact us! Our expert will gladly guide you in choosing your future laboratory instrument.

With over 100 years of experience serving the weighing industry, no company has the knowledge to build quality products like OHAUS.
Known throughout the world, the New Jersey-born company has been manufacturing safe, accurate and reliable balances, analytical instruments and laboratory equipment since Gustav and Karl Ohaus founded the company in 1907.

Thanks for your attention! For any further information, do not hesitate to contact us.

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Federico Ellade Peruzzotti

In Jointlab since 2013 as a creator of texts and graphics.

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