ST-50 agitator

Product Description:The Hqist ST 50 is a universal and powerful laboratory overhead stirrer with a compact appearance, a simple operation panel, and a brushless DC motor technology, which can meet the stirring task of 30000mPas viscosity samples up to 25 l (H2O) .

The Hqist ST 50 is a universal and powerful laboratory overhead stirrer with a compact appearance, a simple operation panel, and a brushless DC motor technology, which can meet the stirring task of 30000mPas viscosity samples up to 25 l (H2O) . The speed range is 0/50 - 2000 rpm, and the speed is automatically adjusted by microprocessor control technology. The safety circuit design ensures that the equipment can automatically stop running when the motor is blocked or overloaded. It can continuously compare the actual speed and the set speed of the stirring shaft, and automatically adjust the speed deviation. This feature guarantees a constant rotational speed during the experiment, even if the viscosity of the sample changes. In addition, the key to the successful mixing of the sample is not only the main agitator, but also the selection of the appropriate stirring paddle. The stirring paddles of the Hqist ST50 are all made of 316L material, and the quality is absolutely guaranteed. , Anchor type (medium and high viscosity), turbine type, centrifugal type (narrow mouth container), fan blade type (smooth sample, good heat exchange), propeller type three-blade, spiral type (S-shaped screw) and other stirring paddles to choose from.

Application areas:

Stirring can be used for homogeneous stirring of compatible liquids, as well as for dissolving and mixing solid particles in liquids. Balancing differences in temperature or concentration makes the stirring process more efficient. In addition, faster liquid agitation speeds up the dissolution process and increases the speed of chemical reactions. Stirring is widely used in schools and universities, as well as in biotechnology, chemical, pharmaceutical, food, daily chemical laboratory formulation research and development and other industries.

ST50 technical advantages

●Precise speed control

The control accuracy is ±1rpm, and the actual value/set value of the speed is accurately displayed. With LED real-time display speed and time, convenient and accurate reading.

●Overload protection

In the event of overload, short circuit or abnormal speed, it will automatically cut off the power supply and give an alarm to ensure safe operation and laboratory safety.

●No consumables

Adopt carbon brushless DC motor

●The stirring direction is interchanged

The stirring direction can be changed clockwise and counterclockwise, and the stirring effect is better.

●Adjustable stirrer chuck (keyless chuck)

It is convenient to adjust the stirring paddle distance up and down to handle more diverse stirring tasks. Easy to disassemble and replace the stirring paddle at any time.

●Standard three stirring paddles (316L stainless steel), a variety of chucks are optional

Standard four-blade type, crushing and dissolving type, anchor type (medium and high viscosity), turbine type, centrifugal type (narrow-mouth container), fan blade type (smooth sample, good heat exchange), propeller type three-blade, spiral type (S-type screw) ) and other stirring paddles are available for selection.

●After-sale guarantee

Warranty for 2 years, and replacement for quality problems within 1 year.

Technical Parameter:

Maximum stirring volume ( H2O )/L	25	Speed control	Stepless
Maximum viscosity/mPas	30000	Speed setting accurac /rpm	±1
Speed range/rpm	0/50-2000	Supply voltage/V	24
Motor principle	Brushless DC Motor	Overall size/WxDxH mm	188x74x208
Shell material	Cast aluminum coating	Continuous working hours allowed	100%
Working ambient temperature/℃	5-40	Forward and reverse operation	Yes
Max torque/Ncm	50	Protection class DIN EN60529	IP42
Motor output power/W	90	Hollow shaft inner diameter/mm	11
Display	LED	Drill chuck clamping range/mm	0.5-10

Sample Viscosity (mPa.s) Reference (20℃)
Water	1	Engine oil	650-900	Toothpaste (40°C)	70000
Milk	2	Shampoo	3000	Asphalt	100000
Coffee Cream	10	Hand Cream	8000	Kerosene	10
Olive oil	100	Refined honey	7000	Glycerin	1000
Lubricating oil	100-200	Ketchup	50000	Body lotion	8000
Silicone oil	500-1000	Honey	10000	Chocolate sauce	25000

Types and applications of stirring paddles

Types of stirring paddles	Picture	Application
1. Standard four-leaf type		The standard stirring paddle makes the mixed medium move axially from top to bottom, thereby generating local shear force, and is used at medium and high speed
2. Crushing and dissolving		Make the mixed medium flow radially up and down to form strong flow and high shear force, which can crush the particles of the liquid. Suitable for medium and high speed.
3. Anchor type (medium and high viscosity)		A tangential flow is generated, and a high shear rate is formed at the edge, so that the mixed medium is not easy to deposit on the wall of the container, and it is used at a low speed. Ideal for medium and high viscosity media
4. Turbo		The mixed medium is pulled from the upper part to generate axial flow, and the container is not easily damaged when the stirring paddle touches the container wall; the shear force is small, and it is used at medium and high speed.
5. Centrifugal (narrow mouth container)		The speed of the double-leaf sheet expands with increasing speed, and is suitable for narrow-mouthed round containers. The stirring effect is similar to that of a propeller propeller (4-piece), use medium and high speed.
6. Fan type (smooth sample, good heat exchange)		It produces tangential flow, low turbulence, good heat exchange performance, mild stirring performance, and is used at medium and low speeds.
7. Three-blade propeller		The high-efficiency liquid flow design makes the mixed medium flow axially from top to bottom, and the shear force is small. Suitable for medium and high speed.
8, spiral (S-shaped spiral)		Produce axial flow. Circulate the medium from bottom to top. For uniform mixing and heat exchange of medium to high viscosity media. Use at low and medium speeds.