Description

USA Lab OS-20 & OS-40 Overhead Mechanical Stirrers – 20L/40L, 50–2200 rpm | USA Lab

Accurate microprocessor speed control guarantees precision, while anti-spill slow start prevents sample splashes. The large chuck diameter accepts many shaft types, and the LCD display shows set/actual values for real-time speed and torque monitoring.

For safety, over-torque protection automatically stops the motor. Connect via RS232 for PC control and data logging. All key parameters can be configured to support comprehensive safety monitoring on the bench.

Shaft: L = 40 cm (15.75") | D = 8 mm (0.315") | Impeller = 5 cm (1.97")

Operate within specified viscosity and temperature ranges. Use appropriate guarding for rotating shafts.
Secure vessel and stand before stirring. Follow manufacturer safety guidance.

50–2200 rpm Brushless DC Motor Over-Torque Protection RS232 PC Control

Precision control: Microprocessor PID ensures accurate, stable rpm under load.

Spill prevention: Soft-start anti-spill routine protects samples and glassware.

Safety & data: Over-torque shutoff, LCD set/actual display, and RS232 logging.

Why buy from USA Lab

Expert Support
Engineers & technicians on staff.

Quality First
Tested and trusted products.

Fast Fulfillment
Nationwide 1-2 day shipping.

Warranty & Parts
US-based service & spares.

Resources & Downloads

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Why the OS-20 / OS-40 Overhead Stirrers?

Microprocessor accuracy — precise rpm with feedback control for consistent viscosity work.
Slow-start anti-spill — gentle ramp prevents media ejection and foaming.
LCD set/actual display — monitor speed and torque in real time.
Robust drive & chuck — brushless DC motor and 0.5–10 mm chuck fit many shafts.
PC connectivity — RS232 for control and documentation; safety parameters configurable.

Talk to an expert

Get shaft selection, impeller sizing, and viscosity guidance for your process.

Call 734-855-4890

Technical Specifications

Specification	OS-20	OS-40
Shaft / Impeller	L = 40 cm (15.75") \| D = 8 mm (0.315") \| Impeller = 5 cm (1.97")
Maximum stirring capacity	20 Liters	40 Liters
Maximum torque	40 N·cm	60 N·cm
Viscosity maximum	10,000 mPa·s (cPs)	50,000 mPa·s (cPs)
Speed range	50–2200 rpm	50–2200 rpm
Speed/Torque display	LCD	LCD
Speed display accuracy	± 3 rpm	± 3 rpm
Speed display resolution	± 1 rpm	± 1 rpm
Chuck diameter range	0.5–10 mm	0.5–10 mm
Dimensions (W×H×D)	3.3"W × 8.7"H × 7.3"D	3.3"W × 8.7"H × 7.3"D
Motor type	Brushless DC motor	Brushless DC motor
Motor rating input	60 W	120 W
Motor rating output	50 W	100 W
Weight	5.5 lb	5.5 lb
Voltage/Power	110 V, 60 Hz	110 V, 60 Hz
Overload protection indicator	LED light	LED lights
Data connector	RS232	RS232
Protection class	IP21	IP21
Permissible ambient temperature & humidity	5–40 °C, 80% RH	5–40 °C, 80% RH

Popular Industries & Use Cases

Chemical Synthesis Pharmaceutical & Biotech Academic & Research Process Development

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Custom Solutions

Tailored tanks, skids, and integration help.

Custom Request Consulting

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We’ll help spec the right system for your throughput.

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FAQ

What is the USA Lab OS-20 & OS-40 Overhead Mechanical Stirrer?

USA Lab OS-20 & OS-40 Overhead Mechanical Stirrers are microprocessor-controlled mixers with 50–2200 rpm ranges and brushless DC drives for precise, reliable stirring up to 20 L or 40 L.

How does the USA Lab OS-20 & OS-40 prevent spills?

Both models use an anti-spill slow start routine that gradually ramps speed to reduce splashing and foam formation.

Can the USA Lab OS-20 & OS-40 connect to a PC?

Yes. An RS232 interface enables PC control and documentation of measured values (speed/torque).

What safety features are on the USA Lab OS-20 & OS-40?

Over-torque protection stops the motor automatically, LCD shows set/actual values, and parameters can be configured for safety monitoring.

Important Shipping Notice!

DISCLAIMER:

All items are carefully packaged to ensure safe delivery. In the rare event that your item arrives damaged, please notify us within 3 days of receipt. We will promptly provide a replacement or issue a refund.

Please note that any damage occurring after delivery is not covered under warranty. We appreciate your understanding and your trust in our products.