Hotplate Stirrers for Superior Heating and Safety Performance: OHAUS Guardian 7000™

OHAUS has introduced the Guardian 7000 Hotplate Stirrers that deliver excellent heating and mixing performance, and include exceptional security features.

The SmartHousing™ is resistant to chemicals and features a novel, easy-to-clean design that guides any spills away from the angled glass control panel and internal components.

The bright LCD display features temperature, time, and speed settings, as well as intuitive icons — all designed to track the performance across the laboratories.

OHAUS Guardian 7000 Hotplate Stirrers

Image Credit: OHAUS

Unique Features

  • SmartLink™ and SmartPresence™ Technologies Ensure Supervised Operation

Users can safeguard their laboratories with patented SmartLink™ and SmartPresence™ methods. These special features turn off the heater automatically if no one is detected once a user set “time out” period has passed.

  • SafetyHeat™ System Protects the Laboratory

An industry-leading early detection system utilizes two separate safety controls to constantly track the electronics and turn off the heating before an over-temperature condition.

  • Powerful and Consistent Stirring Performance

Accurate stirring from 60 to 1600 rpm can be achieved due to the design of a powerful magnet, strong motor, and a software-controlled ramp rate. All these guarantee safe magnetic coupling for viscous applications.

  • Customized Performance for Precise Applications

With the SmartHeat™ technology, users can set the unit to a maximum temperature, while the SmartRate™ allows slow or fast temperature and rapid ramp rates. The programming feature also enables users to store up to five multi-step programs.

GUARDIAN™ 7000 Hotplate Stirrers


The SmartHeat™ safely regulates the highest temperature by avoiding the overheating of sensitive samples.


In case the Bluetooth® link is broken, the heating function will turn off safely.


The SmartRate™ allows users to choose either slow or fast temperature and speed ramp rates for accurate control of samples.


The SmartHousing™ is resistant to chemicals and remains cool to touch.


Special proximity sensor technology identifies nearby users and safely switches off hotplate if none are detected.


The industry-leading internal protection system ensures security in heating applications with dual monitoring of system health.

OHAUS Guardian 7000 Hotplate Stirrers

Image Credit: OHAUS

Source: OHAUS

Model e-G71HS07C e-G71HS10C e-G71HSRDM
Function Heating and Stirring
Top Plate Size 7 x 7 in / 17.8 x 17.8 cm 10 x 10 in / 25.4 x 25.4 cm 5.3 in diameter / 13.5 cm
Speed Range 60 rpm to 1600 rpm
Speed Stability +/- 2%
Temperature Range Ambient + 5 °C – 500 °C Ambient + 5 °C – 380 °C
Temperature Stability* +/- 1% Plate, below 100 C +/-1 °C
and +/- 0.5% Probe, below 100 °C +/-1 °C
Temperature Accuracy* Plate +/- 5 °C (after Single Point Calibration) and Probe +/- 0.5 °C (after Single Point Calibration)
Temperature Calibration Five Plate and Five Probe
Timer 1 minute to 99 hours and 59 minutes
Control Digital
Display Custom Backlit LCD
Communication USB
Capacity 15 L 18 L 20 L
Top Plate Material Ceramic Aluminum
Dimensions (H x L x W) 4.8 x 12.2 x 8.8 in
12.2 x 30.9 x 22.3 cm
4.8 x 16.3 x 11.3 in
12.2 x 41.5 x 28.6 cm
5.0 x 10.5 x 6.8 in
12.6 x 26.7 x 17.3 cm
Net Weight 5.7 lb. / 2.6 kg 11.5 lb. / 5.2 kg 5.7 lb. / 2.6 kg
Power 120 V, 10 A, 50/60 Hz
230 V, 6.0 A, 50/60 Hz
120 V, 11.2 A, 50/60 Hz
230 V, 7 A, 50/60 Hz
120 V, 8.3 A, 50/60 Hz
230 V, 4.6 A, 50/60 Hz
Power Consumption 1080 W (120 V)
1242 W (230 V)
1210 W (120 V)
1449 (230 V)
896 W (120 V)
952 (230 V)
Working Environment 41 °F – 104 °F, 80% RH, non-condensing / 5 °C – 40 °C, 80% RH, non-condensing
Accessories Temperature probe and In use cover (Included)

* Conditions permitting. Variations in temperature measurement process, vessel, ambient and sample will impact actual performance.

Outline Dimensions

OHAUS Guardian 7000 Hotplate Stirrers

Image Credit: OHAUS

Other Features and Equipment

Icons are included for SmartHeat™, SmartRate™, SmartLink™, SmartPresence™, and green indicator lights when the unit is stirred and heated.

Other features are probe in use, IP21 Ingress Protection, USB port for programming of repeat applications, on/off switch for heater disconnect, control knobs, probe connection, easy-to-clean ceramic or aluminum tops, built-in support rod holder, and hardened glass front panel.


  • Product safety: TÜV SÜD certified to CAN/CSA C22.2 61010-1; CAN/CSA C22.2 61010-2010; CAN/CSA C22.2 61010-2-051; UL 61010-1; UL 61010-2-010; UL 61010-2-051.
  • Electromagnetic compatibility: Canada ICES-003 Class A; FCC Part 15 Class A.
  • Compliance mark: TÜV SÜD.

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