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USA Lab
Overhead Stirrer - 20L & 40L
$659.00 - $750.00
In stockPrice varies by Size.
Overhead mechanical stirrer for 20 L or 40 L, 50–2200 rpm, with microprocessor speed control, anti-spill slow start and over-torque protection.
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Description
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")
Stand Included
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 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.
Get shaft selection, impeller sizing, and viscosity guidance for your process.
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
Chemical Synthesis Pharmaceutical & Biotech Academic & Research Process Development
FAQ
What is the OS-20 & OS-40 Overhead Mechanical Stirrer?
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 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 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 OS-20 & OS-40?
Over-torque protection stops the motor automatically, LCD shows set/actual values, and parameters can be configured for safety monitoring.
Specifications
RPM:
50-2200 rpm
Power:
110 V / 60 Hz
Max Viscosity:
5-40°C
Speed display accuracy:
± 3rpm
Frequently asked questions
What sizes are available?+
20 litres (OS-20) and 40 litres (OS-40).
What is the speed range?+
50–2200 rpm, under microprocessor speed control.
What does the LCD show?+
Set and actual values for real-time speed and torque monitoring.
What safety features are fitted?+
Anti-spill slow start to prevent sample splashes, and automatic over-torque protection.
