Overhead Stirrer – High Torque and Speed

The High Torque and Speed Overhead Stirrer models from Wiggens—including the WOHS-200 Pro, WOHS-400 Pro, and WOHS-20 HPro—are built for laboratories in South Africa that need dependable mixing of high-viscosity liquids and solids. Each High Torque and Speed Overhead Stirrer is designed for demanding applications such as chemical synthesis and biotechnology workflows.

These stirrers feature microcomputer-controlled constant speed, a brushless DC motor, and exceptional low-speed torque—over five times more powerful than at higher speeds. Explore our range of laboratory equipment at Apex Scientific or visit our Insights page to read our article on, Choosing the Right Overhead Stirrer for Your Laboratory.

High-Torque Overhead Stirrer Solutions for Demanding Laboratory Applications

The High Torque and Speed Overhead Stirrer range by Wiggens, available from Apex Scientific, delivers precision mixing for medium to high viscosity liquids and solid-liquid mixtures. Designed for laboratories in South Africa, the WOHS-200 Pro, WOHS-400 Pro, and WOHS-20 HPro models offer high-performance stirring for chemical synthesis, pharmaceuticals, biotechnology, and related scientific fields.

 

Powerful and Versatile Mixing Performance

Each stirrer in this series supports high-viscosity, large-volume sample mixing. Advanced microcomputer control keeps the speed constant—even under heavy load. Additionally, adjustable speed settings and torque outputs offer exceptional flexibility. At low speed, torque exceeds high-speed torque by over five times. Therefore, whether emulsifying complex compounds or suspending particles, these stirrers provide the strength and consistency needed for demanding tasks.

 

Built for Durability and Continuous Operation

A brushless DC motor powers each unit, ensuring quiet, maintenance-free performance. This motor handles high loads with ease and is optimized for daily use. As a result, labs experience less downtime and fewer maintenance issues. Furthermore, each stirrer works with various impellers to suit different viscosities and mixing goals.

 

Intuitive and Scientist-Friendly User Interface

Wiggens stirrers prioritize usability. A bright TFT display provides high-contrast visibility, even from a distance. You can control speed using the central turning knob and responsive touch keys, accurate to ±1 rpm. Operational status is easy to interpret: blue indicates standby, green signals active use, and red shows an alarm. This color-coded interface ensures you always know the status of your equipment.

 

Advanced Features for Enhanced Control

These stirrers include a keyless chuck that allows tool-free shaft changes with a clamping range of 0.5–10 mm. RS232 and RS485 communication ports enable automated control and logging. Moreover, the digital timer can be set for up to 99 hours and 59 minutes. An integrated temperature sensor provides measurements from -10 to 350 °C, with 0.1 °C resolution for precise monitoring.

Accessories

Supporting Scientific Excellence in South Africa

Researchers across South Africa rely on Wiggens Overhead Stirrers for their power, precision, and adaptability. At Apex Scientific, we offer the full range to help you meet your lab’s specific stirring needs with confidence. Need help selecting the right model? Visit our Insights page and read: Choosing the Right Overhead Stirrer for Your Laboratory: Key Considerations and Applications.

ModelWOHS-200 ProWOHS-400 ProWOHS-20 HPro
Order No.W3041030W3041018W3041060
Speed Range (rpm)30~600(I)20~360(I)60~1200(I)
601~3000(II)361~1800(II)1201~6000(II)
Torque max. at stirring shaft [N-cm]339(I)565(I)170(I)
68(II)113(II)34(II)
Maximum Stirring volume(L)H20100
Maximum stirring viscosity (cps)10000015000070000
Maximum Torque [N-cm]339565170
Setting accuracy speed [rpm]1
Deviation of speed measurement n > 300rpm±3 %
Speed DisplayTFT
Speed settingTouch key and turning knob
Time setting range99h59min59sec
Temperature measuring range[℃ ]-10~350
Temperature measurement resolution[℃ ]0.1
Working status indicatorStandby (blue) , Running (green) , Alarm (red)
Interface RS-232/485 and analog connectionYes
Power [W]150
Motor principleBrushless DC motor
Stirring element fasteningKeyless chuck, easy to install and replace the shaft
Chuck range diameter [mm]0.5~10
Hollow shaft, inner diameter [mm]10.2
Power supply100~240VAC,50/60Hz
SKUDescription
W3041030WOHS-200 Pro Overhead Stirrer
W3041030-P1WOHS-200 Pro Package 1 – Overhead Stirrer and WH25-D Support stand
W3041030-P2WOHS-200 Pro Package 2 – Overhead Stirrer, WH25-D Support stand and 9004 impeller
W3041030-P3WOHS-200 Pro Package 3 – Overhead Stirrer, WH25-D Support stand and 5.255.10.2 PTFE impeller
W3041018WOHS-400 Pro Overhead Stirrer
W3041018-P1WOHS-400 Pro Package 1 – Overhead Stirrer and WH25-D Support stand
W3041018-P2WOHS-400 Pro Package 2 – Overhead Stirrer, WH25-D Support stand and 9004 impeller
W3041018-P3WOHS-400 Pro Package 3 – Overhead Stirrer, WH25-D Support stand and 5.255.10.2 PTFE impeller
W3041060WOHS-20H Pro Overhead Stirrer
W3041060-P1WOHS-20H Pro Package 1 – Overhead Stirrer and WH25-D Support stand
W3041060-P2WOHS-20H Pro Package 2 – Overhead Stirrer, WH25-D Support stand and 9004 impeller
W3041060-P3WOHS-20H Pro Package 3 – Overhead Stirrer, WH25-D Support stand and 5.255.10.2 PTFE impeller
ModelDescription
MD-24Magnetic stirrer guides
KA22-02Stirrer guides
5.101.1.7Universal stirrer guide
8050-02High vacuum stirrer guide
5.0.0619High performance stirrer guide
8126-05Coupling
KA11-91Lifting platform
WH220027Clamps
KA00-52Three-Prong Clamp
KA00-50Two-Prong Clamp
KA00-57Utility Clamp Flat
KA00-58Utility Clamp, 3 Prong
KA00-71BClamp Swivel
KA00-67FExtension-Type
KA00-70AJumbo Clamp
KA00-56Chain Clamp
KA00-69Frame Holder
11090-17Clamp Holder All-Position
11084-11Clamp Universal Swivel, “Power Hold”
KA00-50BFlexible Arm
11058-10Ultraflex clampling system
WE-11Extension Rod
WHIClamp Holder
WH2Clamp Holder
WH4Clamp Holder
WH11Plate stand
WF11-DPlate stand
WH11-SWH-stand
WH33-SWH-stand
WH30Electric H-stand
WH21-DH-stand with Ø16mm double-rod
WH23-DSH-stand with Ø16mm single-rod
WH43-SWH mobile floor stand with Ø32mm single-rod
005.230.2Screw Propeller, 4-Bladed (PTFE Coated)
005.330.2Anchor Impeller (PTFE Coated)
005.430.2Centrifugal Stirrer, 2-Bladed (PTFE Coated)
005.80850.300Retreat Curve Impeller (PTFE Coated)
005.530.1Impeller Shafts for Blades (PTFE Coated)
002.052.1Blades (PTFE Coated)
005.100830EXPlain Impeller Shafts (PTFE Coated)
005.606040.4 Blade Angled Type 45° Metric
005.706070.Flat Impeller
005.90850.Adjustable Turbine
9603Pivoting Blade
9703Straight 2-Blade
9053Straight 4-Blade
9209Centrifugal
94033-Hole Blade
95036-Hole Blade
9003Pitched Leaf
9103Propeller Stirrers, 3 Fix Blades
9610Anchor Impeller
9025Turbine Impeller
9030Radial Flow
9020Multi-Purpose

Insights Article: Choosing the Right Overhead Stirrer for Your Laboratory: Key Considerations and Applications

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