Quick answer. Choose the heat source by the solvent, not by habit. Every Soxhlet and fat extraction run in MSA-0001 to MSA-0007 boils a volatile flammable solvent for hours, often unattended, and an exposed hot plate surface can ignite that vapour where an enclosed heating mantle does not. For petroleum spirit, hexane, ether or anything similar, specify a mantle (MSA-0001, MSA-0004) or a unit built around one (MSA-0002). For the two hot plate types, MSA-0005 and MSA-0006, ask what liquid each is intended for before ordering. Then plan the run around one failure: the condenser cooling water stopping.
Seven items are listed here, MSA-0001 to MSA-0007: heating mantles, Soxhlet extraction heating units and fat extraction apparatus, a crude fibre estimation apparatus and an immersion heater. The chemistry these serve is solvent extraction, which means a volatile flammable solvent boiled continuously for hours, and that makes this range the highest fire risk in most teaching and food-testing laboratories. One consequence is worth stating before the specifications: a hot plate is the wrong heat source for a volatile solvent, and one code in this listing is a hot plate type. That section is below.
| Code | Item | What it is for |
|---|---|---|
| MSA-0001 | Heating mantle | General flask heating |
| MSA-0004 | Soxhlet heating mantle | Mantle sized and arranged for extraction |
| MSA-0002 | Soxhlet extraction apparatus with heating unit | Extraction, complete with its heater |
| MSA-0003 | Soxhlet fat extraction apparatus | Fat determination in food and feed |
| MSA-0005 | Soxhlet extraction heater, hot plate type | Extraction, heated by hot plate; see the warning below |
| MSA-0006 | Crude fibre estimation apparatus, hot plate type | Fibre determination by hot acid and alkali reflux |
| MSA-0007 | Immersion heater | Direct heating of a liquid |
A heating mantle encloses its element in the fabric that cradles the flask, so there is no exposed hot surface and no glowing element for solvent vapour to reach. An open hot plate has an exposed heated surface, and a heated surface can ignite the vapour of a volatile solvent. Solvent extraction produces exactly that vapour, continuously, for the whole run, and any leak at a joint or a failure of the condenser puts it over the heater.
So, for extraction with petroleum spirit, hexane, ether or any similar solvent, specify a mantle (MSA-0001, MSA-0004) or a complete unit built around one (MSA-0002). If you are considering MSA-0005 or MSA-0006, ask the supplier directly what solvent the hot plate version is intended for and what the surface temperature is, and ask whether a mantle version of the same apparatus can be supplied instead. There are legitimate uses for a hot plate type, principally where the heated liquid is aqueous, which is the case for much of the crude fibre method, but the question has to be asked rather than assumed.
A Soxhlet runs for hours and is normally left running, which is the opposite of most laboratory operations, so the protections have to be built in rather than supervised:
One solvent-specific point: diethyl ether forms peroxides on storage and the peroxides concentrate in the residue when the solvent is evaporated, so ether is bought in small quantities, dated on receipt, kept away from light and discarded by the date rather than kept until it is used up. If your method allows petroleum spirit or hexane instead, that is the easier solvent to hold safely.
A mantle is sized to a flask, not to a wattage, and a flask that does not match its mantle is the usual cause of cracked glass and burnt mantles. Ask:
Two rules for the laboratory wall: a mantle is never switched on empty, which destroys the element, and an immersion heater (MSA-0007) is never switched on out of liquid, which destroys it in seconds and is a fire risk. For the immersion heater, ask the wattage, the sheath material and whether it is suitable for the liquid you intend, since many sheaths are not suitable for acids.
Ask, against each code: the number of places, which sets throughput, and whether places can be run independently; the flask and extraction thimble sizes, and whether thimbles are supplied and at what price, since they are the consumable; the condenser type and the cooling water consumption per place; whether solvent recovery is provided, which matters for cost and for how much solvent you handle; and whether the quoted item is the complete glass train or only the heater. On MSA-0003, ask which standard method it is built for, since fat determination methods differ in solvent, time and sample preparation, and the apparatus has to match the method your results will be reported against.
For the crude fibre apparatus (MSA-0006), ask what the digestion vessels are made of and whether they resist the hot acid and alkali the method uses; whether a filtration arrangement and crucibles are included; and what fume handling the acid reflux stage needs, since this method produces its own fume even though the solvent risk is lower.
Ask whether MSA-0001 and MSA-0004 differ in anything but the name, since one is a heating mantle and the other a Soxhlet heating mantle with nothing stated to separate them, and the same of MSA-0002 against MSA-0003. Ask for the method sheet and the glassware list with the quotation, replacement glassware and thimble prices, the installation requirements as a document, the supply voltage, frequency and plug type for your country, and the warranty. Any figure quoted is confirmed in writing on the quotation; ask for its basis.
Nitrogen and protein determination, which shares the fume and acid questions, is under Kjeldahl Digestion and Distillation Unit. Solvent recovery under vacuum is under Rotary Vacuum Evaporator, distilled water under Water Distillations and Stills, and sterilisation and shaking under Autoclaves, Sterilizers and Shakers. Weighing, which every gravimetric determination here depends on, is under Lab Balances and Scales.
State the method you are working to and the solvent it uses, and ask for a mantle-heated unit unless the supplier can justify otherwise. For example a six-place Soxhlet extraction unit with heating mantles (MSA-0002), with the thimble size and price, the cooling water demand per place, the over-temperature protection and the availability of a water flow switch confirmed in writing. Contact Ray Export for specifications, prices and lead times.
An open hot plate has an exposed heated surface, and a heated surface can ignite the vapour of a volatile solvent. Extraction produces that vapour continuously for the whole run, and a leak at a joint or a condenser failure puts it straight over the heater. For volatile solvents, specify a heating mantle (MSA-0001, MSA-0004) or the mantle-heated unit MSA-0002. If you are looking at MSA-0005, ask what solvent the hot plate version is intended for and what its surface temperature is, and whether a mantle version of the same apparatus can be supplied instead.
The crude fibre method (MSA-0006) works by hot acid and alkali reflux, and much of that liquid is aqueous, which is the legitimate case for a hot plate. It still needs checking rather than assuming. Ask what the digestion vessels are made of and whether they resist the hot acid and alkali the method uses, whether a filtration arrangement and crucibles are included, and what fume handling the acid reflux stage needs. The solvent fire risk is lower here, but the method produces its own fume, so do not plan it for an open bench without asking.
This is the main scenario to design against. If the condenser water stops, solvent vapour stops condensing and goes into the room, over a hot heater, during a run that is normally left unattended. Ask whether a water flow switch that cuts the heater is available, or fit a recirculating chiller so the supply does not depend on the building. At a minimum, ask the required cooling water flow rate and fit a visible flow indicator. Also ask for over-temperature protection independent of the main controller, whether it latches or resets itself, and what happens if the control thermostat fails closed.
Size it to the flask, not to a wattage. A flask that sits proud of its mantle has a hot ring round it, and a flask too small for its mantle leaves the element exposed; mismatches are the usual cause of cracked glass and burnt mantles. For MSA-0001 and MSA-0004, ask the flask capacity each is made for and whether one mantle covers a range, the wattage, whether the controller is integral or a separate energy regulator, whether a stirrer is fitted, whether it is rated for all-day running, and whether the housing can be cleaned after a solvent spill. Never switch a mantle on empty.
Start with the method. On MSA-0003, ask which standard fat determination method it is built for, because methods differ in solvent, time and sample preparation, and the apparatus has to match the method your results will be reported against. Then ask, for MSA-0002 and MSA-0003: the number of places and whether they run independently, the flask and extraction thimble sizes, whether thimbles are supplied, the condenser type and cooling water use per place, whether solvent recovery is provided, and whether the quotation covers the complete glass train or only the heater.
Ask what extraction or fume cupboard the supplier assumes; extraction fast enough to clear solvent vapour is not the same as general room ventilation. Keep ignition sources off the bench and away from the floor, including bench-level switches and sockets, because solvent vapours are heavier than air and collect low down. Keep a carbon dioxide or dry powder extinguisher within reach, not water, with a spill plan and absorbent. Store bulk solvent outside the laboratory where possible. Diethyl ether forms peroxides on storage, so buy it in small quantities, date it on receipt and discard it by that date.
Ray Export is a manufacturer and exporter of laboratory, scientific and educational equipment based at Plot No. 449, HSIIDC Industrial Area, Saha, Ambala, Haryana 133104, India. Enquiries: [email protected], +91-9817319615.
Written by Palak Mall, Senior Content Writer. Technically reviewed by Arvind Kumar, Lab Equipment Specialist, 12+ years in laboratory and testing instrumentation. Last updated: 18 October 2026.
Specifications for MSA-0001 to MSA-0007, including number of places, flask and thimble sizes, wattage and protection devices, are confirmed in writing on the quotation. For electrical safety or other documents, contact us for the latest copies of the relevant certificates. No price is quoted on this page. Listing note: MSA-0001 Heating mantle and MSA-0004 Soxhlet heating mantle have nothing stated to tell them apart, nor do MSA-0002 and MSA-0003; and MSA-0005 is a hot plate type heater offered for solvent extraction.
Warming Mantles intended to meet the most noteworthy electrical norms. The adaptable mantle is suspended over a warm protecting Former which furnishes greatest warmth exchange combined with least danger of cup breakage. The external lodging is built of aluminum, completed with warm and marr obstruction epoxy polyester paint, which is conjunct the protection, to guarantee a sheltered, low external case temperature. All mantles have marker lights temperature control controller and a string. 10 liter model is furnished with 2 circuits and 20 liter, 30 liter are furnished with 3 circuits.
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Soxhlet Extraction Unit of three or six with fiber glass mantles. It is perfect for completing extraction tests. The unit comprises of a minimized rectangular box segment of metal, lodging the warming components and implicit controls. The adaptable and flexible warming components guarantee close contact with the cup surface and even circulation of warmth over the whole surface. In the event of spillage, the solvents will either vanish or escape through the deplete openings gave under break. High warm protection of glasswool backing the warming components limits the warmth misfortunes. Each carafe break is furnished with a pilot light and a controller or flip switch. The inherent vitality controllers are given to encourage great control of temperature. Outside cases are done with warmth and maar safe epoxy-polyster paint
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Finish with one carafe and knob condenser with compatible joints.
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For fat extraction. The unit comprises of a minimized rectangular box area of metal, lodging the warming components and implicit controls. The adaptable and versatile warming components guarantee close contact with the carafe surface and even appropriation of warmth over the whole surface. If there should arise an occurrence of spillage, the solvents will either dissipate or escape through the deplete openings gave under break. High warm protection of glasswool backing the warming components limits the warmth misfortunes. Each flagon break is given a pilot light and a controller or flip switch. The inherent vitality controllers are given to encourage great control
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Soxhlet Extraction Heater Hot Plate Type This warmer is utilized to warm soxhlet flagons and it comprises of a mellow steel lodging. Six hot plates of 4½ diameter(in inches) are mounted over the lodging and can be worked by individual ON/OFF switch and Rotary switch. Gentle steel lodging has two bars with two customizable cross poles on which the glass mechanical assembly can be settled. Electrically worked on 220/260 volts AC mains with most extreme power rating of 900 watts. The mechanical assembly is provided without glass parts. Request glass parts additional as required.
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The contraption comprises of a gentle steel lodging. Six hot plates of 4½ diameter(in inches) are mounted over the lodging and can be worked with singular vitality controller electrically worked on 220/230 volts mains. Most extreme power add up to rating is 900 watts AC. The device is provided finished with six tall frame spoutless measuring utensils, six knob compose condensers and clips for holding glass parts
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For 220 Volts AC. Appropriate for bubbling.
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