Ohaus Guardian 5000™ Hotplate Stirrers

Ohaus Guardian 5000™ Hotplate Stirrers for Application-Based Model Selection

This series is especially useful for routine testing, inspection, and quality-control workflows, where the right choice often depends on differences in configuration, range, portability, and application fit.

Firstly, the design of the Ohaus Guardian 5000™ Hotplate Stirrers ensures proper mixing and temperature control of the top plate or your sample when using the optional temperature probe. The heating models include a Single Point Calibration feature for multiple setpoints. Select from five models with three plate sizes for your everyday heating and stirring applications.

The Next Generation Guardian 5000 Hotplate Stirrers are engineered for safety and versatility across research, academic and industrial settings. They offer powerful heating and mixing, with premium hardware and software to support diverse users safely and reliably. Heating models reach up to 550 °C and feature 3 temperature control modes for quick heating or precise heating effectively reduce temperature overshoot. Select from 5 models with 3 plate sizes.

Ohaus Guardian 5000™ Hotplate Stirrers

Specifications for the Guardian 5000 Hotplate Stirrers

Applications

Display

Backlit LCD Display for temperature and speed, green indicator lights when the unit is heating and stirring, prominent hot top indicator light, probe in use icon, Single Point Calibration icon

Operation

Stirring from 60 to 1600 rpm, Temperature range of ambient +5°C to 500°C (ceramic top) or 380°C (aluminum top), power cord (included), stirring models include a 1.5” (3.8 cm) PTFE coated stir bar

Construction

Probe connection, SmartHousing™ stays cool to the touch and is chemical resistant, IP21 Ingress Protection, polycarbonate front panel, control knobs, On/Off switch for heater disconnect, built-in support rod holder, easy to clean ceramic or aluminum tops

Design Features

Hot top indicator light, audible alarm, SafetyHeat™ protection shuts off the heater in the event of a malfunction, temperature calibration feature for 3 probe and 3 plate setpoints Safety Heat System Protects the Lab An industry-leading early detection system that uses two independent safety controls to continuously monitor the electronics and shut off the heating before an overtemperature condition occurs.

Powerful, Consistent Stirring Performance Precise stirring from 60 to 1600 rpm is made possible by the design of a powerful motor, strong magnet, and software-controlled ramp rate, ensuring secure magnetic coupling for viscous applications.

Easy to Read LCD Display With Everything You Need to Know The bright LCD display includes large temperature and speed settings, intuitive icons, and a prominent hot top indicator - all designed to quickly and easily monitor performance from across the lab. Designed for Durability and Reliability with the Exclusive SmartHousing The SmartHousing is chemical resistant with an innovative, easy-to-clean design that channels spill away from internal components and the angled control panel.

Q&A - Guardian 5000 Hotplate Stirrers

What safety features are included in the Guardian 5000 Series?

The Guardian 5000 Series features SafetyHeat™ protection that shuts off the heater in the event of malfunction, and SmartHousing™ remains cool to the touch and is chemical resistant. Two independent safety controls monitor electronics and prevent overtemperature conditions.

What top plate material should I choose for my lab?

Ceramic plates are chemical resistant, visible for sample color, and withstand higher temperatures up to 500 °C. Aluminum plates provide uniform temperature distribution, durability, and resistance to cracking or chipping. Selection depends on your application and sample type.

How precise is the stirring and temperature control?

The device offers stirring from 60 to 1600 rpm with software-controlled ramp rates and heating up to 550 °C (depending on plate type) with three temperature control modes for fast or precise heating.

What are the built-in applications or uses for the Guardian 5000?

Applications include boiling water, preparing water/oil baths, dissolving buffers and reagents, media preparation, and concentrating samples. Optional probes extend monitoring and calibration capabilities.

Is the Guardian 5000 easy to operate and read?

The bright backlit LCD provides temperature, speed, probe, and calibration information at a glance. Intuitive icons simplify operation, while audible alarms and indicator lights keep the user informed of heating or stirring status.

Are there standard accessories or included items?

Power cord, optional temperature probes, PTFE-coated stir bars (for stirring models), and a built-in support rod holder are included. Calibration for multiple setpoints is supported on heating models.

Can the Guardian 5000 be used safely in educational settings?

Yes, with its chemical-resistant SmartHousing and SafetyHeat early detection system, the Guardian 5000 provides safe and reliable operation for students and instructors in labs.

What type of Guardian top plate material best suits the lab, ceramic or aluminum?

Ceramic and aluminum top plates are both suitable for lab use and each material has its benefits. Most importantly, Ceramic top plates are chemical resistant and safer if working with corrosive chemicals that may splash onto the plate surface. They can withstand higher temperatures up to 500 °C and can be wiped clean. The white surface of a ceramic top plate is preferable for quantitative chemical analysis or other work where clear visibility of the sample color is required. The edges of a ceramic top plate may not be as hot as the center. This may not be suitable if uniform heating over the entire plate surface is needed for the application. Aluminum top plates offer more uniform temperature over the entire heating surface and will not crack or chip, and will withstand accidental handling. To avoid thermal shock, glassware should be used on ceramic top plates, and heating of metallic vessels should be avoided. Above all, Ceramic top plate units are also not suitable for sandbaths or any vessel that may reflect heat back onto the surface which may cause thermal shock.

What kinds of users typically benefit from this product line?

These products are commonly considered by organizations involved in sample preparation, routine lab heating, incubation, dissolving, and mixing tasks where users need to compare block count, vessel size, controller type, and stirring capability across related models.

Related Products

For other lab mixing and heating solutions, check out the OHAUS Guardian 4000 Hotplate Stirrers for general-purpose lab heating and stirring, the Precision Hotplate Stirrers for advanced temperature control, or the Magnetic Stirrers for small-scale mixing applications.

QUICK TIP:

Typical Time to Boil Water

The chart below is an example of an approximate time to boil for the specified amount of water in a specific vessel. These values are only approximate and can vary from unit to unit. Values are based on 23°C water in an ambient environment of 23°C. For example:

Learn more in the Instruction Manual / Quick Start Guide