Specifications

Component List

All components listed below are included in this kit. Items marked Optional can be customized.

Component	Standard Spec	Upgrade Options	Qty	Link
Please contact us to confirm the available specifications.

📌 Customization Notes:
• Heating mantle capacity: 250ml (standard), 500ml (standard), 1000ml
• Stir bar sizes can be matched to your flask volume
• Magnetic stirrer upgrade: Heated stirrer (with built-in heating for water baths)
• Temperature sensor options: PT100 (standard) or Thermocouple (higher temperatures)
• Mix and match — no minimum order quantity

💡 Recommended Add-Ons: Iron stand · Flask clamp · Cross clamp · Extension cords · Spare stir bars

Product Description

I. Heating Mantle — Delivering "Temperature" to Reactions

The heating mantle is one of the most common heating devices in the lab. It uses embedded resistance wire to generate heat, transferring it evenly to the flask above. Compared to electric hot plates and open flames, heating mantles offer uniform heating, precise temperature control, and no open flame — much safer when heating flammable solvents.

This set includes 250ml and 500ml heating mantles, covering the two most common sizes for routine synthesis. Each mantle is equipped with a digital temperature controller that displays current temperature in real time with ±0.5℃ accuracy. The heating mantle inserts are stainless steel — corrosion-resistant and easy to clean.

✦ Heating Mantle vs Hot Plate vs Oil Bath:

Heating Mantle: Even heat, no flame, precise control — the most versatile choice for most synthesis
Hot Plate: Fast heating but open flame — fire risk with flammable solvents, poor temperature control
Oil Bath: Uniform at high temperatures (>300℃) — but messy, greasy, and poses fire risk

II. Magnetic Stirrer — Making Reactions "Move"

The magnetic stirrer uses a rotating magnetic field to drive a stir bar, providing quiet, contactless stirring. Compared to mechanical stirring, magnetic stirring produces no noise, has no mechanical seal issues, and is ideal for sealed reaction systems.

This set's magnetic stirrer features a brushless DC motor — quiet (<40dB), long-lasting (24-hour continuous operation is fine). Maximum stirring capacity is 5L, with a speed range of 100–1500 rpm, covering everything from test tubes to 5L flasks. The stirrer plate is ceramic-coated — chemically resistant and easy to clean.

III. Temperature Sensor — Seeing the Temperature

The temperature sensor is key to closed-loop temperature control. A PT100 sensor immersed in the reaction solution measures temperature in real time and feeds it back to the controller, which automatically adjusts heating power based on the setpoint. Without a sensor, you're adjusting temperature by guesswork — with one, you get precise control: set the temperature and that's what the flask gets.

IV. Material & Workmanship

Heating mantle housings are cold-rolled steel with a powder-coated finish — rust-resistant and durable. Heating elements are nickel-chromium alloy wire with high-temperature insulation — long service life. The magnetic stirrer motor is a brushless DC motor — maintenance-free. The temperature sensor is stainless steel PT100 — corrosion-resistant, fast response.

Applications

Typical Applications

Organic Synthesis

Heating and stirring for various synthesis and reflux reactions

Distillation Heating

Providing stable heat for distillation setups

Extraction Stirring

Mixing during liquid-liquid extraction

Solution Preparation

Accelerating dissolution when preparing solutions

Teaching Labs

University chemistry lab heating and stirring operations

Flask Capacity	Recommended Mantle	Best For
Please contact us to confirm the available specifications.

Flask Capacity	Recommended Stir Bar	Viscosity
Please contact us to confirm the available specifications.

Operation & Maintenance

User Guide

The keys to using a heating mantle and magnetic stirrer are temperature sensor insertion depth and stir bar selection. Here are the essentials.

🚨 Three rules to remember:
① Add stir bar before liquid, before heating — order matters
② Sensor must be immersed at least 1cm — too shallow gives inaccurate readings; too deep hits the flask bottom
③ Heating mantle must match flask capacity — a 250ml flask needs a 250ml mantle; mismatches cause uneven heating

I. Before You Start

Check the heating mantle power cord — any damage?
Check the stirrer plate — is it clean and free of residues?
Check the temperature sensor — bent or damaged sensors are unsafe
Check stir bars — cracked bars can contaminate the reaction
Confirm the flask capacity matches the heating mantle

Assembly sequence

Place the magnetic stirrer on a stable, level surface
Add the stir bar to the flask — stir bar first, then liquid — order matters
Place the flask in the heating mantle, and the heating mantle on the stirrer plate
Insert the temperature sensor through the flask opening — 1–2cm below the liquid surface
Secure the flask and sensor with an iron stand and clamp
Connect power and start the stirrer and heating mantle

III. Startup & Parameter Setting

Start stirring first, then heating — allows the liquid to circulate and prevents localized overheating
Start the stirrer at 100–200 rpm, then gradually increase to the target speed
Set the heating mantle temperature and start heating
Monitor the digital display to confirm the temperature is rising steadily

IV. Monitoring

Watch the stir bar — if it's wobbling, the speed is too high or the bar is off-center
Watch the temperature reading — the difference between setpoint and actual temperature reflects control accuracy
If the temperature overshoots by more than 5℃, reduce heating power or adjust PID parameters
If the liquid level drops during the reaction (solvent evaporation), pause heating, top up solvent, then resume

V. Shutdown

Turn off the heating mantle first
Keep the stirrer running to circulate the liquid and dissipate heat
When the temperature drops below 60℃, turn off the stirrer
Disconnect power, remove the temperature sensor and flask
Clean the stir bar, flask, and sensor — wipe the sensor tip clean

📌 Why stir bar first, then liquid:

Always add the stir bar before the liquid. If you add liquid first and then drop the stir bar in, it can splash — especially dangerous with hot liquids.
Stir bar position: The stir bar should sit centered at the bottom of the flask. If it's off-center, it will wobble or spin unevenly, and may even be thrown off (demagnetized).

💡 From a Seasoned Lab Hand:

"Stir bar selection depends on flask size and liquid viscosity" — small flasks (100-250ml) use Φ6×20mm; large flasks (500-1000ml) use Φ8×30mm. For viscous liquids (glycerol, silicone oil), use elliptical stir bars for better efficiency.
The difference between "set temperature" and "actual temperature": The setpoint is the heating mantle temperature, while the actual temperature is the liquid temperature in the flask. There may be a 10-30℃ difference depending on heating power and heat dissipation. Using a PT100 sensor directly monitors the liquid temperature for precise control.
Sensor position: The sensor tip should be suspended in the liquid, not touching the flask bottom or wall — touching gives you flask temperature, not liquid temperature.
Shutdown order: Turn off heating first, then wait for the temperature to drop below 60℃ before turning off stirring — stopping stirring at high temperatures can cause localized overheating.

Care & Notes

Show care & notes

⚠️ Safety & Compliance Checklist

Match the heating mantle to the flask

The flask bottom must fully contact the mantle insert — poor contact causes localized overheating

Keep sensor cables away from the heating mantle

Heat can melt the insulation and cause shorts

Always heat flammable solvents in a fume hood

with adequate ventilation

Do not

Never operate a heating mantle without a flask: Dry heating will burn out the heating element
Avoid splashing with the magnetic stirrer: Excessive stirring speed can cause splashing, especially with low-viscosity solvents

Heating & Stirring Set

Specifications

Component List

Product Description

I. Heating Mantle — Delivering "Temperature" to Reactions

II. Magnetic Stirrer — Making Reactions "Move"

III. Temperature Sensor — Seeing the Temperature

IV. Material & Workmanship

Applications

Organic Synthesis

Distillation Heating

Extraction Stirring

Solution Preparation

Teaching Labs

User Guide

I. Before You Start

Assembly sequence

III. Startup & Parameter Setting

IV. Monitoring

V. Shutdown

Care & Notes

Match the heating mantle to the flask

Keep sensor cables away from the heating mantle

Always heat flammable solvents in a fume hood

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Heating & Stirring Set

Specifications

Component List

Product Description

I. Heating Mantle — Delivering "Temperature" to Reactions

II. Magnetic Stirrer — Making Reactions "Move"

III. Temperature Sensor — Seeing the Temperature

IV. Material & Workmanship

Applications

Organic Synthesis

Distillation Heating

Extraction Stirring

Solution Preparation

Teaching Labs

User Guide

I. Before You Start

Assembly sequence

III. Startup & Parameter Setting

IV. Monitoring

V. Shutdown

Care & Notes

Match the heating mantle to the flask

Keep sensor cables away from the heating mantle

Always heat flammable solvents in a fume hood

Related Apparatus Kits

Reflux Apparatus

Heated Stirring Synthesis

Simple Distillation

Soxhlet Extraction

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