Name: Rotary mixer STR4 Manufacturer and Supplier in India - STEMAids
Price: 42560.00 INR
Availability: InStock

The StemAids Rotary Mixer STR4 is a versatile laboratory rotator designed for gentle, uniform, and controlled mixing of tubes, flasks, bottles, microcentrifuge tubes, suspensions, reagents, biological samples, and laboratory solutions. It is suitable for school laboratories, college laboratories, university practical labs, clinical laboratories, biotechnology labs, pharmaceutical labs, research facilities, and quality-control laboratories.

Product Description

The Rotary Mixer STR4 supplied by StemAids is a general-purpose rotator drive unit used with interchangeable drums for different laboratory mixing applications. It provides controlled rotary movement for tubes, bottles, flasks, and sample containers, allowing users to perform gentle end-over-end mixing, bottle rotation, and figure-8 style mixing depending on the selected drum accessory.

This rotary mixer is designed for laboratories that require reliable sample agitation without vigorous shaking. Its variable speed control, built-in analogue timer, and continuous operation option make it suitable for routine biological sample mixing, blood sample suspension, reagent blending, diagnostic sample preparation, and research laboratory workflows.

Key Features

Variable speed control for controlled rotary mixing.
Accepts a choice of five interchangeable drum accessories.
Built-in analogue timer for timed laboratory operation.
Continuous operation mode for longer mixing procedures.
Suitable for tubes, flasks, bottles, microcentrifuge tubes, and sample containers.
Supports end-over-end mixing, bottle rotation, and figure-8 mixing depending on drum selection.
Stable benchtop design for routine laboratory use.
Suitable for biological samples, blood samples, suspensions, reagents, and buffers.
Useful for educational, clinical, biotechnology, pharmaceutical, and research laboratories.
Procurement-friendly configuration for laboratory catalogues, quotations, and institutional tenders.

Product Specifications

Product Name	Rotary Mixer STR4
Brand	StemAids
Reference Model	Stuart STR4 type rotator drive unit
Instrument Type	General-purpose laboratory rotary mixer / rotator drive unit
Mixing Motion	End-over-end rotation, bottle rotation, or figure-8 mixing depending on drum accessory
Speed Range	6-60 rpm
Speed Control	Variable speed control
Timer	Analogue timer, 10-60 minutes
Operation Mode	Timed operation / continuous operation
Maximum Load	Up to 3 kg
Accessory Compatibility	Compatible with five drum accessories for tubes, flasks, bottles, figure-8 mixing, and microcentrifuge tubes
STR4/1 Drum	Test tube holder drum for end-over-end mixing; accepts clip plates for different tube sizes
STR4/2 Drum	Flask / bottle drum for two 250 mL flasks or reagent bottles
STR4/3 Drum	Figure-8 drum for one vessel up to approx. 200 mm length and 120 mm diameter
STR4/4 Drum	Bottle holder drum with four cradles for containers up to approx. 120 mm diameter and 300 mm length
STR4/5 Drum	Microcentrifuge tube drum with four racks; each rack can hold up to 60 × 1.5 mL tubes
Dimension	Approx. 650 × 250 × 250 mm
Net Weight	Approx. 6.4 kg
Electrical Supply	230 V, 50 Hz
Power Consumption	Approx. 50 W
IP Rating	IP31
Installation Type	Benchtop
Application Area	Biology labs, chemistry labs, clinical labs, biotechnology labs, pharmaceutical labs, research labs, and educational laboratories

Applications

Gentle mixing of biological samples and laboratory reagents.
Blood sample mixing and suspension maintenance.
End-over-end mixing of test tubes and centrifuge tubes.
Mixing of buffers, enzymes, antibodies, and protein samples.
Rotation of flasks, bottles, reagent containers, and sample vessels.
Figure-8 mixing for selected containers using the compatible drum.
High-throughput mixing of 1.5 mL microcentrifuge tubes with suitable accessory.
Routine sample preparation in clinical, biotechnology, and research laboratories.
Educational demonstrations in school, college, and university laboratories.

How to Use the Rotary Mixer STR4

Place the rotary mixer on a clean, dry, flat, and stable laboratory bench.
Connect the unit to the recommended power supply.
Select the correct drum accessory according to the sample container type and mixing requirement.
Install the drum securely on the STR4 drive unit before loading samples.
Place tubes, bottles, flasks, or containers evenly in the drum or holder.
Ensure all sample containers are properly capped or sealed before operation.
Check that the total load does not exceed the recommended maximum capacity.
Switch on the unit using the mains switch.
Set the required rotation speed between 6 and 60 rpm.
Set the timer between 10 and 60 minutes, or select continuous operation if longer mixing is required.
Observe the first few rotations to confirm stable and balanced movement.
After completion, stop the mixer and allow the drum to come to a complete stop before removing samples.
Clean the drum, holder, and external surface after use according to laboratory cleaning practice.

Safety and Handling Guidelines

Do not exceed the recommended maximum load of 3 kg.
Always balance samples evenly before starting the unit.
Use properly capped tubes, bottles, and flasks to prevent leakage during rotation.
Do not touch or adjust the rotating drum while the mixer is running.
Use only compatible drum accessories and tube holders.
Do not move the unit while it is operating or connected to the mains supply.
Keep the instrument away from water splashes, corrosive vapours, and unstable surfaces.
Wear laboratory gloves, safety goggles, and a lab coat while handling samples.
Disconnect the power supply before cleaning or changing drum accessories.
Do not immerse the instrument in water or cleaning liquid.

Why Choose StemAids Rotary Mixer STR4?

StemAids supplies laboratory instruments for educational institutions, research laboratories, clinical facilities, biotechnology labs, pharmaceutical labs, and institutional procurement projects. The Rotary Mixer STR4 is suitable for laboratories that require flexible sample mixing across multiple container formats.

Suitable for tubes, flasks, bottles, microtubes, and sample containers.
Variable speed control supports different sample mixing requirements.
Timer and continuous operation options support routine laboratory protocols.
Interchangeable drum system allows multiple mixing actions from one drive unit.
Useful for biology, chemistry, clinical, biotechnology, pharmaceutical, and research laboratories.
Suitable for laboratory setup projects, quotations, catalogues, and institutional tenders.

Technical Note

The STR4 is supplied as a rotator drive unit, and vessel-holding drums are selected separately according to the required application. For correct performance, users should select the appropriate drum based on vessel size, tube diameter, sample volume, and required mixing action.

Frequently Asked Questions

1. What is the Rotary Mixer STR4 used for?

It is used for gentle rotary mixing of tubes, bottles, flasks, microcentrifuge tubes, biological samples, blood samples, reagents, buffers, suspensions, and laboratory solutions.

2. What is the speed range of the STR4 rotary mixer?

The reference STR4 rotary mixer has a variable speed range of 6-60 rpm.

3. Does the STR4 have a timer?

Yes. It includes an analogue timer that can be set from 10 to 60 minutes. It can also be used in continuous operation mode.

4. What is the maximum load capacity?

The reference STR4 drive unit supports a maximum load of up to 3 kg when used with suitable accessories.

5. Are drum accessories included with the drive unit?

The STR4 is generally supplied as a drive unit, and vessel-holding drums are selected or ordered separately according to the required application.

6. Which accessories can be used with the STR4?

Compatible drum options include a test tube holder drum, flask or bottle drum, figure-8 drum, four-bottle holder drum, and microcentrifuge tube drum.

7. Is the STR4 suitable for biological samples?

Yes. Its gentle rotary motion is suitable for biological samples, blood samples, cell suspensions, buffers, reagents, and diagnostic sample preparation.

8. Can it be used for microcentrifuge tubes?

Yes. With the compatible STR4/5 microcentrifuge tube drum, the unit can be used for high-throughput mixing of 1.5 mL microcentrifuge tubes.

9. Is this product suitable for school and college laboratories?

Yes. It is suitable for biology labs, chemistry labs, medical laboratory training, STEM labs, college practical work, and university research applications.

10. How should the Rotary Mixer STR4 be cleaned?

Switch off and disconnect the unit before cleaning. Wipe the external surface and drum accessories with a soft cloth and mild laboratory-safe cleaning solution. Do not immerse the drive unit in liquid.