Electric Heating Sleeve
Laboratory Electric Heating Mantle
Heating Up To 380°C, Models Available: 100ml—20L, Accurate Temperature Control/ Rapid Temperature Rise/ Durable. Hemispherical Internal Heating Heater. Glass Fiber, High Heating Efficiency, High Temperature Resistance. CLT-1A –Digital Magnetic Model,It Has Magnetic Stirring Function.
Electric Heating Mantle Description
The Electric Heating Mantle Is A Hemispherical Internal Heating Alloy Electric Heating Wire Heater.
The Maximum Temperature Can Reach 380°C.
Models Available: 100ml—20L.
High Heating Efficiency, High Temperature Resistance,
Alkali-Free Glass Fiber Wrapped Heating Wire,
The Measurement Results Are Efficient And Accurate.
Highly Sensitive Temperature Sensor.
Knob Temperature Control Combined With Pointer Display Allows Intuitive Control Of Gears, Stable Heating Speed, And No Sudden Cooling Or Heating. It Is Suitable For Round Bottom Flasks And Used In Daily Chemical Heating Experiments, Making It Worry-Free And Stable To Use.
Electric Heating Mantle Product Video
Technical Specifications / Model Tables



Model | DZTW / CLT-1A / ZNHW | |||
Capacity (ml) | 100 | 250 | 500 | 1000 |
Power (W) | 100 | 180 | 250 | 300 |
Inner Rim Diameter | 76 | 100 | 115 | 145 |
Outer Rim Diameter | 165 | 165 | 165 | 210 |
Maximum Temperature (°C) | 380 (Maximum Temperature Refers To The Instrument Temperature, Not The Sample Temperature) | |||
Temperature Control Method | Electronic Temperature Control | |||
Inner Liner Material | Glass Fiber | |||
Power Supply | AC100-220V50HZ | |||
Net Weight (Kg) | 1.6 | 1.6 | 1.6 | 2.8 |
Product Dimensions (mm) | 200×165 | 200×165 | 200×165 | 260×200 |
The Table Below Shows The Capacity Of 2000 - 20000ML
Model | DZTW / CLT-1A / ZNHW (sunlabpro.com) | |||
Capacity (ml) | 2000 | 3000 | 10000 | 20000 |
Power (W) | 500 | 600 | 1500 | 2500 |
Inner Rim Diameter | 182 | 200 | 305 | 380 |
Outer Rim Diameter | 250 | 300 | 390 | 500 |
Maximum Temperature (°C) | 380 (Maximum Temperature Refers To The Instrument Temperature, Not The Sample Temperature) | |||
Temperature Control Method | Electronic Temperature Control | |||
Inner Liner Material | Glass Fiber | |||
Power Supply | AC100-220V50HZ | |||
Net Weight (Kg) | 3.5 | 3.7 | 7 | 11.5 |
Product Dimensions (mm) | 300×220 | 300×190 | 395×240 | 500×320 |
Product Overview
Laboratory Heating Mantle
A laboratory heating mantle is a wrap-around, flameless heating device mainly designed for uniform and constant-temperature heating of round-bottom flasks, three-neck flasks, and other glass laboratory vessels. It is widely used for distillation, reflux, extraction, concentration, and organic synthesis, making it a common heating device in chemical, biological, pharmaceutical, and research laboratories.
Working Principle
The heating mantle uses a nickel-chromium alloy heating wire woven into high-temperature-resistant, alkali-free glass fiber to form a hemispherical heating chamber. When powered on, the resistance wire generates heat, which is evenly transferred to the vessel through the wrap-around heating structure. This design provides a large heating area, with the effective heated area reaching more than 60%. A built-in temperature sensor works together with a PID controller to automatically adjust the heating power for precise temperature control. Digital models can typically achieve temperature control accuracy of up to ±1°C.
Applications
Laboratory heating mantles are widely used in organic synthesis, including esterification, condensation, and reflux reactions; distillation, purification, and solvent recovery; natural product extraction; and sample preparation processes such as digestion and concentration. They are particularly suitable for heating flammable organic solvents. Compared with open-flame heating methods, the flameless design can significantly reduce the risk of fire during laboratory operations.
Laboratory Heating Mantle Selection Guide
When selecting a laboratory heating mantle, several factors should be considered. Choose the appropriate capacity, typically ranging from 200 mL to 2 L, according to the size of the commonly used flask, ensuring a proper fit between the vessel and the heating mantle. Digital PID models are preferred when more precise temperature control is required. The maximum temperature is generally around 360–380°C, which is suitable for most laboratory heating applications. Safety features such as over-temperature power-off protection, dry-run protection, and leakage protection should also be considered. For applications requiring simultaneous heating and stirring, an integrated magnetic stirring heating mantle can be selected.
Sunlabpro has more than 10 years of experience supplying laboratory instruments from China. We support orders starting from one unit and provide reliable product quality. Competitive discounts are available for larger quantities.
Product Detail

The Maximum Temperature Can Reach 380°C. Models Available: 100ml—20l.

High Heating Efficiency, High Temperature Resistance,
Alkali-Free Glass Fiber Wrapped Heating Wire.
Highly Sensitive Temperature Sensor,
The Measurement Results Are Efficient And Accurate.
OEM / ODM Services
MOQ: 1 Piece. Buyer'S Logo Customization Is Available For Orders of 50 Pieces or More. ODM Orders Are Shipped Within 12–25 Days After Order Confirmation.
Electric Heating Mantle Product Packaging
Customer Photos/ Customer Review

Anonymous buyer 1:
This pointer heating sleeve is compact and does not occupy the countertop. The pointer scale is precise, which can accurately control the heating rate. The heating is even and there are no dead spots. The bottom is non-slip and stable, and the glassware will not shake and tip over easily.

2:
This electric heating jacket has perfect workmanship details, the inner tank fits the flask, and the heating is evenly distributed. The temperature control knob adjusts smoothly, the heat insulation is reliable, the operation noise is low, and it can handle reflux and distillation experiments. It is recommended to buy it.

3:
The quality of the electric heating jacket used in the laboratory is very good. It heats evenly, the temperature rises smoothly, and the insulation effect is good. The outer shell is not hot to the touch. The temperature control is simple, stable for reflow heating experiments, safe to use, and very cost-effective.
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- Phone+86 186 2076 5685
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