IKA MINISTAR 40 overhead stirrer, digital, electronic, up to 25 litres, 0025004886

The IKA MINISTAR 40 digital overhead stirrer represents a highly optimised, space-saving mechatronic system solution for the professional mixing, homogenisation and suspension of liquid sample media in day-to-day laboratory work. Designed as an ultra-compact powerhouse, this electronic laboratory stirrer combines impressive power density with minimal space requirements. In intensive fluid-mechanical processes within chemical research, pharmaceutical development or biotechnological analysis, maintaining an absolutely constant speed despite varying viscosities is the primary criterion for guaranteeing reproducible reaction conditions in a way that is gentle on the material and ensures process reliability.

Intelligent torque compensation in the smallest of spaces

The process engineering foundation of the MINISTAR 40 digital is based on a microprocessor-controlled high-end drive that delivers a maximum torque of up to 40 Ncm. Despite its compact design, the stirrer effortlessly handles working volumes of up to 25 litres (based on water) and covers a wide viscosity range of up to 30,000 mPas. An outstanding functional feature is the integrated transient speed control: in the event of rheological changes in the medium during a synthesis – for example, due to polymerisation or crystallisation – the electronics adjust the power supply in real time to maintain the preset speed of up to 2,000 revolutions per minute at a perfectly constant level.

Ergonomic glass interface and intuitive operation

The materials-science-based design of the user interface sets new standards in terms of hygiene and durability. The stirrer is fitted with a high-quality, continuous glass front, which is operated via integrated, touch-sensitive keys. This non-porous surface offers universal chemical resistance to aggressive solvents, acids and alkalis, and can be cleaned gently and without leaving any residue. A high-contrast digital display shows the exact rotational speed and the transient torque trend. The latter enables laboratory staff to monitor changes in the sample’s viscosity directly and precisely, without the need for additional rheology measuring instruments.

Future-proof connectivity and comprehensive health and safety

The infrastructure architecture of the MINISTAR 40 digital is consistently geared towards the requirements of modern, digitised laboratory set-ups. Firmware updates can be carried out quickly and easily via an integrated USB interface, ensuring that the system’s control software is always up to date. Comprehensive safety peripherals ensure maximum occupational safety during demanding continuous operation: in the event of a blockage of the stirring mechanism or critical thermal overload, the integrated overload protection safely shuts down the motor. A practical key-lock function also prevents the accidental alteration of process parameters during ongoing test series.

Technical details

Drive & Stirring Specifications

• Number of stirring points: 1
• Max. stirring volume per stirring point ($H_2O$): 25 litres
• Max. rated torque: 40 Ncm
• Max. viscosity: 30,000 mPas
• Speed range: 0/30 to 2,000 rpm (continuously adjustable)
• Speed stability: Microprocessor-controlled, automatic load compensation
• Torque display: Trend display via screen

Design, materials & geometry

• Control panel: High-quality, chemical-resistant glass surface with touch function
• Display type: Digital LED/LCD combination display
• Chuck range (internal diameter): 0.5 to 8 mm
• Hollow shaft (penetration capability when stationary): Yes
• Overall dimensions (W x D x H): approx. 70 x 147 x 193 mm
• Net weight: approx. 1.2 kg
• Enclosure protection class according to DIN EN 60529: IP 40

Interfaces, electronics & safety

• Connectivity: Integrated USB interface (for updates)
• Safety systems: Electronic overload protection, thermal motor protection, visual error code display, key lock
• Mounting: Integrated tripod socket (rear, diameter 13 mm)
• Power supply: 100–240 V / 50/60 Hz (external power supply unit)

Contents of delivery

• 1 x IKA MINISTAR 40 digital overhead stirrer base unit (MPN: 0025004886)
• 1 x IKA Chuck Key (chuck key)
• 1 x USB cable
• 1 x universal mains adaptor with country-specific plugs
• 1 x Operating instructions / Quality certificate

Important note: A suitable laboratory stand, the required cross-coupling and application-specific stirring elements (e.g. propeller stirrers, anchor stirrers or dissolver discs) are not included in the standard scope of delivery and must be configured separately.

Individual requirements & accessories

To ensure the IKA MINISTAR 40 digital delivers its full fluid-mechanical performance, we offer a comprehensive range of manufacturer-certified accessories. For the homogeneous mixing of low- to medium-viscosity media, we recommend corrosion-resistant IKA propeller agitators (e.g. R 1342) or turbine agitators. For highly viscous samples or dispersions, our range includes specialised centrifugal stirrers and dissolver discs. For secure and vibration-free mounting at your workstation, we offer robust bench stands (e.g. IKA R 1826) as well as high-strength cross clamps (R 182). Please make use of our technical procurement service to tailor your mixing peripherals to your specific requirements.