What is a magnetic stirrer used for?

A magnetic stirrer is used to mix liquids by creating a rotating magnetic field that causes a stir bar (flea) immersed in the liquid to spin. This provides efficient and consistent agitation without direct contact with the sample.

Can this unit handle viscous liquids?

While effective for many solutions, compact magnetic stirrers like this are generally best suited for low to medium viscosity liquids. Highly viscous fluids may require more powerful stirring mechanisms or overhead stirrers.

What maintenance is typically required for a magnetic stirrer?

Maintenance is generally minimal. It primarily involves keeping the stirring surface clean and ensuring the power cord and housing are free from damage. Regular checks for proper stir bar rotation are also advisable.

Is this type of stirrer suitable for continuous operation?

Many laboratory-grade magnetic stirrers are designed for extended operation. However, for specific continuous use applications, it is best to consult the manufacturer's guidelines or the seller for this particular unit.

What kind of stir bars are compatible?

Magnetic stirrers are compatible with a range of PTFE-coated magnetic stir bars of various sizes and shapes. The optimal stir bar size depends on the vessel and liquid volume being stirred.

used Equipment

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Hanna HI190M Magnetic Stirrer -

Brand: Hanna HI190M Magnetic Stirrer
SKU: 508254. HSR9A
Price: 70 GBP
Availability: InStock

Price: £ 70

This listing is for the Hanna HI190M Magnetic Stirrer

The unit is in full working condition and is ready for immediate use

The Hanna HI190M is a compact and durable magnetic stirrer designed for efficient mixing in constrained lab spaces.

Key Features

Compact & Lightweight Design

The device measures approximately 120 × 120 × 45 mm (4.8 × 4.8 × 1.8 in) and weighs between 610 g (12 V DC version) and 640 g (115 V version)

Its small footprint helps free up valuable bench space

Speedsafe™ Safety Mechanism

This smart system prevents dangerous overspeed when the stir bar is suddenly removed, using an opto-sensor and a frequency-voltage converter to monitor and limit speed

Adjustable Speed Range

Offers stirring speeds from 100 to 1000 RPM, providing precise control over mixing

Durable Housing

The ABS plastic casing resists many chemical spills, enhancing longevity and safety

Power Indicator LED

A handy LED lets you know at a glance that the unit is powered on and operating

Fuse & Grounding Protection

The 115 V and 230 V versions include a replaceable fuse for short-circuit protection, and the case is grounded for additional safety

Cambridgeshire, United Kingdom

5,791 km away

Model Number

Hanna HI190M Magnetic Stirrer

Stock Number

508254. HSR9A

Machinery Masters View

Typical context for this category of equipment. Always confirm specifics with the seller.

Applications & Use Cases

Used for dissolving solids into liquids in chemical and biological preparations.
Ideal for titrations and pH adjustments requiring consistent mixing.
Suitable for preparing culture media and reagent solutions in laboratory settings.
Applied in quality control for sample homogenisation prior to analysis.

Typical Specifications

Typical Stirring Capacity: Units of this class commonly handle volumes up to 1-2 litres.
Speed Range: Typically offers adjustable speeds from 100 to 1000 RPM, providing controlled mixing.
Power Supply: Often available in 115 V AC or 230 V AC versions, with some models offering 12 V DC.
Footprint: Compact design, typically around 120 x 120 mm, suitable for benchtop use where space is limited.
Housing Material: Commonly constructed with ABS plastic for chemical resistance and durability.
Safety Features: Units of this type often include a 'Speedsafe' mechanism to prevent overspeeding and may feature fuse protection and grounding.

Frequently Asked Questions

A magnetic stirrer is used to mix liquids by creating a rotating magnetic field that causes a stir bar (flea) immersed in the liquid to spin. This provides efficient and consistent agitation without direct contact with the sample.

Machinery Masters Intelligence. General guidance for this category of equipment only, not a substitute for the seller's exact specifications. Always confirm details with the seller.