Description

The DMS7-550M LCD Digital-Control 7-Inch Heating Magnetic Stirrer (2024 Model) is a high-capacity laboratory hotplate stirrer designed for precise heating and powerful mixing of large-volume liquid samples. Featuring a durable 7-inch glass ceramic work plate (184 × 184 mm), the unit offers excellent resistance to strong acids, alkalis, and high temperatures while maintaining easy cleaning after reagent or solvent spills.

This magnetic stirrer supports a maximum stirring volume of up to 20 liters (H₂O) and provides a wide stirring speed range of 50–1500 rpm with precise 1 rpm increments. The brushless DC motor delivers stable stirring performance, low noise operation, and long service life while remaining maintenance-free. The LCD display clearly shows both set and real-time values for temperature, speed, and time, allowing convenient monitoring and precise control during experiments.

The heating system offers a temperature range from room temperature to 550 °C with 1 °C adjustment increments. When used with the included PT1000 external temperature sensor (±0.2 °C accuracy), the system enables highly accurate temperature control for heating and stirring applications requiring precise thermal conditions.

For enhanced safety and reliability, the device incorporates multiple protection mechanisms including residual heat warning above 50 °C, adjustable safety temperature limits up to 580 °C, and dual independent safety circuits that continuously monitor system status. In case of overheating, sensor malfunction, or system errors, the instrument automatically stops heating and alerts the user.

The corrosion-resistant metal housing improves durability and heat dissipation, while the waterproof structural design helps prevent liquids from entering internal electronic components. With an integrated timer function (1 minute – 99 hours 59 minutes), RS232 connectivity for computer control, and included temperature sensor and support clamp, the DMS7-550M provides a powerful and reliable heating and stirring solution for demanding laboratory applications.

Specifications

Parameter	Specification
Cat.No.	8021482211 (Main Unit) / 8121482211 (Set)
Work Plate Dimension	184 × 184 mm (7 inch)
Work Plate Material	Glass ceramic
Max. Stirring Quantity [H2O]	20 L
Speed Range	50–1500 rpm, increment 1 rpm
Speed Display	LCD
Temperature Display	LCD
Heating Temperature Range	Room Temp. – 550 ℃, increment 1 ℃
Adjustable Safety Temperature Range	50–580 ℃
Temperature Control Accuracy	±1 ℃ (<100 ℃) \| ±1% (>100 ℃)
Temperature Display Accuracy	0.1 ℃
External Temperature Sensor	PT1000 (accuracy ±0.2 ℃)
"Hot" Warning	50 ℃
Overheating Temperature Protection	580 ℃
Motor Type	Brushless DC motor
Stirring Positions	1
Max. Magnetic Bar Length	80 mm
Data Connector	RS232
Timer Function	1 min – 99 h 59 min
Protection Class	IP21
Motor Rating Output	10 W
Power	1200 W
Heating Output	1150 W
Voltage / Frequency	100–120 / 200–240 V, 50 / 60 Hz
Dimension [W × D × H]	360 × 230 × 110 mm
Weight	4.3 kg
Permissible Ambient Temperature	5–40 ℃
Permissible Ambient Humidity	80% RH

Features

The ceramic plate has strong corrosion resistance, capable of withstanding strong acids, alkalis, and high temperatures. It is easy to clean solvents, oils, or other contaminants that may accidentally spill.
The corrosion-resistant full metal casing has excellent heat dissipation performance and reliable fire protection capabilities.
The efficient flow platform and waterproof design prevent liquids from entering the interior of the machine, protecting the electronic components from corrosion.
High-temperature resistant, strong magnetic stirrers provide powerful stirring force, suitable for mixing viscous liquids.
Safety lock to prevent accidental changes in operating status.
Buzzer: When the machine malfunctions or the countdown for the timing function ends, the buzzer emits a “beep” sound to alert the user.
Residual heat warning: When the plate temperature exceeds 50 °C, heating will be automatically turned off, and the display will show a flashing “HOT” warning. Even when the power is turned off, the “HOT” warning will continue flashing on the display, alerting the user of the high temperature.
Two independent safety circuits continuously monitor the device. In case of overheating, sensor malfunction, or a system error, the machine will stop heating. If a short circuit occurs, the power will be automatically cut off, ensuring the operator's safety.
DC brushless motor: Spark-free, long lifespan, low noise, maintenance-free, and smooth operation.
LCD display: Shows set and real-time values for speed, time, and temperature, offering clear and intuitive readings.
The timer function is available with a range of 1 minute to 99 hours and 59 minutes. Once the countdown ends, heating will stop, but stirring will continue to avoid thermal damage to the sample.
Remote control function is available, allowing the device to be connected to a computer.
Safety temperature can be set.

Applications

Chemical Reaction Mixing: Suitable for heating and stirring chemical reactions in organic synthesis, analytical chemistry, and laboratory research.
Large-Volume Solution Preparation: Ideal for dissolving solids and preparing buffers or reagents in volumes up to 20 liters.
Sample Heating and Homogenization: Provides uniform mixing and temperature distribution for liquid samples requiring controlled heating.
Pharmaceutical and Chemical Development: Used for mixing and heating processes during formulation development, synthesis, and experimental research.
Material Science and Industrial Research: Suitable for preparing chemical mixtures and suspensions used in materials and industrial laboratory studies.
General Laboratory Mixing and Heating: Designed for routine heating and stirring tasks in research institutes, universities, and industrial laboratories.

Compoments

LCD Digital-Control 7-Inch Heating Powerful Magnetic Stirrer with Timer (2024 Model)- package; Including temperature sensor and suppor clamp

DMS7-550M LCD Digital-Control 7-Inch Heating Powerful Magnetic Stirrer with Timer (2024 Model) – Package; Including Temperature Sensor and Support Clamp