Magnetic stirrers
OHAUS Guardian – complete range of laboratory hotplates and magnetic stirrers
The OHAUS Guardian product range offers a wide selection of laboratory hotplates and magnetic stirrers, from cost-effective basic models to premium units equipped with intelligent safety features.
All models in the Guardian series are designed for stable temperature control, powerful stirring performance and long-term reliability, making them suitable for both everyday routine work and specialised laboratory applications.
Precise control, advanced safety features and robust construction make Guardian instruments ideal for research, analytical, industrial, quality control and educational laboratories.
Guardian 7000 – premium laboratory solution
- The Guardian 7000 series offers high-precision temperature and stirring control, a full-colour display and intelligent safety features for advanced laboratory and industrial use.
- The integrated SmartHeat™, SmartPresence™ and SmartLink™ systems provide maximum user safety and process monitoring.
Guardian 5000 – advanced performance for research laboratories
- The Guardian 5000 series features digital controls, precise temperature and speed settings, and reliable overtemperature protection.
- It is particularly well suited to research and analytical laboratories where stable heating performance and high stirring capacity are essential.
Guardian 3000 – essential digital solution
- Guardian 3000 instruments support routine laboratory tasks with a digital display, straightforward operation and stable, reproducible performance.
Guardian 2000 – reliable, cost-effective model
- The Guardian 2000 series offers a durable, analogue-controlled solution for educational and general laboratory use where reliability and affordability are key priorities.
Get in touch, and we will help you choose!
Available models:
Guardian 7000 – Premium Series
| Feature Model | e-G71HS07C | e-G71HS10C | e-G71HSRDM |
|---|---|---|---|
| Size | 17.8 x 17.8 cm (square) | 25.4 x 25.4 cm (square) | 13.5 cm diameter (round) |
| Stirring capacity | 15 l | 18 l | 20 l |
| Function | Heating and stirring | ||
| Surface | Ceramic | Aluminium | |
| Stirring speed | 600 – 1600 rpm | ||
| Temperature range | Ambient temperature +5 °C – 500 °C | Ambient temperature +5 °C – 380 °C | |
Guardian 5000 – Advanced Performance
| Feature Model | e-G52HSRDA | e-G52HS10C | e-G52HS07C | e-G52HP07C | e-G52ST07C |
|---|---|---|---|---|---|
| Kit model*** | e-G52HSRDA -K1 | e-G52HS10C -K1 | e-G52HS07C -K1 | e-G52HP07C -K1 | – |
| Function | Heating and stirring | Heating | Stirring | ||
| Size | Ø 13.5 cm | 26×26 cm | 18×18 cm | ||
| Surface | Ceramic-coated aluminium | Ceramic | |||
| Stirring speed | 50 – 1800 rpm | – | 50 – 1800 rpm | ||
| Temperature range | Ambient temperature +5 °C – 360 °C | Ambient temperature +5 °C – 500 °C | Ambient temperature +5 °C – 550 °C | ||
| Temperature sensor | PT100, PT1000 (Class A) | – | |||
| Stirring capacity | 20 l | 22 l | 20 l | – | 20 l |
*: Kit model.
**: Depending on conditions. Temperature and speed measurement methods, vessel type, ambient conditions and sample characteristics affect actual performance.
***: To improve the system's temperature accuracy, use the Single Point Calibration function.
Guardian 3000 – Basic digital solution
| Specification Model | e-G31HSRDS | e-G31HS04C | e-G31HS07C |
|---|---|---|---|
| Kit model** | e-G31HSRDS -K1 | e-G31HS04C -K1 | e-G31HS07C -K1 |
| Function | Heating and stirring | ||
| Dimensions | Ø 13.5 cm | 10.8 x 10.8 cm | 18 x 18 cm |
| Surface | Ceramic-coated stainless steel | Ceramic | |
| Stirring speed | 80 – 1600 rmp | ||
| Temperature range | Ambient temperature +5 °C – 380 °C | Ambient temperature +5 °C – 500 °C | |
| Temperature sensor | PT1000 (Class A) | ||
| Stirring capacity | 15 l | ||
*: Depending on conditions, temperature and speed measurement, vessel type, ambient conditions and sample characteristics may affect actual performance. The Kit-1 (K1) package includes temperature probe 30500590 and probe holder kit 30973298.
**: To improve temperature accuracy, use the Single Point Calibration function.
Guardian 2000 – Reliable basic model
| Specification Model | e-G21ST04R | e-G21HP04C | e-G21HS04C | e-G21ST07R | e-G21HP07C | e-G21HS07C | e-G21STRDS | e-G21HPRDS | e-G21HSRDS |
|---|---|---|---|---|---|---|---|---|---|
| Function | Stirring | Heating | Stirring and heating | Stirring | Heating | Stirring and heating | Stirring | Heating | Stirring and heating |
| Dimensions | 10,2 × 10,2 cm | 17,8 × 17,8 cm | Ø 13,5 cm | ||||||
| Surface | Resin | Ceramic | Resin | Ceramic | Ceramic-coated stainless steel | ||||
| Stirring speed | 200 – 1600 rpm | – | 200 – 1600 rpm | 200 – 1600 rpm | – | 200 – 1600 rpm | 200 – 1600 rpm | – | 200 – 1600 rpm |
| Temperature range | – | 70 °C – 500 °C | – | 70 °C – 500 °C | – | 50 °C – 380 °C | |||
| Stirring capacity | 15 l | ||||||||
| Control | Analogue | ||||||||
