Quick answer. Check that each rig can turn a rate into a coefficient. Every mass transfer experiment here measures a rate, and a rate only becomes a transferable coefficient if three things are known: the driving force, which means analysing both phases or reading wet and dry bulb temperatures on a dryer; the interfacial area, such as a column's wetted area; and a settled steady state before readings begin. Ask what each rig measures on both phases, not just one. Then order by name, because this listing also holds records copied in from unrelated ranges and shares its MTLE prefix with another category.
The mass transfer equipment in this listing covers six subjects, and these are the records to ask for by name: diffusion - vapour in air, liquid in liquid and solid in air diffusion apparatus; gas-liquid contacting - a wetted wall column and absorption in a wetted wall column; adsorption in a packed bed; drying - a fluidised bed dryer, a rotary dryer and natural and forced draft tray dryers; extraction - solid-liquid extraction of the packed bed type and liquid-liquid extraction in a packed bed; and distillation, including a steam distillation set-up.
And the part we would rather tell you than let you discover. This listing also contains records that are not mass transfer equipment at all - they were copied in from other ranges when the catalogue was imported, and most of them can be recognised by a digit on the end of the name. Among them are a shoe flex tester, which belongs with footwear testing equipment; a Martindale abrasion tester, which belongs with fabric testing equipment; a windmill machine, which belongs with renewable energy trainers; and several friction and toggle joint rigs, which belong with theory of machines. There is also a record named after this category itself. We are cleaning this up. In the meantime, ask for the mass transfer items by name, ignore anything with a trailing digit unless we confirm what it is, and have the product name and specification confirmed on the proforma invoice.
One further code warning: this listing uses the prefix MTLE, and so does momentum transfer lab equipment - both category names end in "Transfer Lab Equipment". MTLE-0001 is a fluidised bed dryer here and a drag coefficient apparatus there.
Every experiment in mass transfer measures a rate, and a rate is only a coefficient if three things are known. This is the test to apply to any rig on this page before buying it, and it is what separates a demonstration from a result.
| What must be known | In practice that means | If it is missing |
|---|---|---|
| The driving force | The concentration or humidity difference between the two phases - which means analysing both streams, or measuring wet and dry bulb temperatures on a dryer | No driving force, no coefficient. On a dryer, without the inlet air humidity you cannot compute the driving force at all, only the time the sample took to dry in that room on that day |
| The interfacial area | The wetted area of a column, the surface of a sample, the external area of the particles in a bed | The result is a rate for that apparatus rather than a transferable coefficient |
| Time, and steady state | A stable temperature and a settled flow before readings begin; and for diffusion, patience, because the measurable change is slow | A reading taken while the rig is still settling is a measurement of the settling |
So when you ask us for a quotation, ask what each rig measures on both phases, not just one.
Four dryers are listed - fluidised bed, rotary, natural draft tray and forced draft tray - and drying is the mass transfer subject a student is most likely to meet at work, in food, pharmaceutical and chemical plants alike. The experiment is the drying curve: moisture content against time, showing the constant-rate period, the critical moisture content and the falling-rate period where the material itself starts to control.
Getting that curve requires one thing that is easy to leave off a specification. The sample has to be weighed repeatedly without stopping the air flow - a dryer where the tray must be removed and carried to a balance gives a drying curve with holes in it, and every interruption changes the conditions. Ask whether the sample can be weighed in situ, by a balance under the tray or a suspended arrangement, and what its resolution is.
Then ask for the air side: air flow rate and how it is measured, inlet air temperature and humidity, by wet and dry bulb thermometers or a hygrometer, and whether the air can be heated to a set temperature and held there. A dryer with controlled air temperature, measured air flow and measured humidity produces a drying curve a student can interpret; one with a fan and a heater produces a curve that cannot be compared with anything, including the same experiment next week in different weather.
The wetted wall column gives a gas-liquid mass transfer coefficient, and it depends entirely on the liquid film being smooth and unbroken over the full wetted length. A column with poor liquid distribution channels, the film breaks, the real area is unknown and the coefficient is wrong - so ask how the liquid is distributed at the top, what the wetted length and diameter are, and how the gas is analysed at inlet and outlet. For absorption work, ask what system the rig is designed for and what reagents the analysis needs.
The diffusion apparatus - vapour in air, liquid in liquid, solid in air - measures a diffusivity, which is a slow measurement of a small change: a falling liquid level in a capillary over hours, or a conductivity rising as salt diffuses. Two things matter: a stable temperature, because diffusivity is temperature-dependent and the experiment runs long enough for a room to warm up; and a readable measurement, so ask how the level or the concentration is read and at what resolution. These are good project experiments and poor two-hour practicals.
The extraction units, solid-liquid and liquid-liquid, teach stage efficiency and the use of an operating line, and they bring solvents into the laboratory. Ask which solvent the exercise assumes, whether it can be imported and stored where you are, how it is recovered, and where the spent extract goes. Many extraction solvents are flammable, so extraction equipment belongs in an extracted position away from heaters and ignition sources, and the laboratory needs the provisions set out in our chemical reaction engineering listing - fume extraction, eyewash, a spill kit and a waste route agreed in writing before delivery.
Adsorption in a packed bed produces a breakthrough curve, which is the design basis for every industrial adsorber. Ask what adsorbent is supplied, how the effluent concentration is measured continuously or sampled, and whether the bed can be regenerated so the experiment can be repeated without buying new adsorbent each time - the regeneration is itself worth a session.
Settle before delivery: electrical supply with earth-leakage protection on every outlet, since water, solvents and heaters share these benches; cooling water supply and drain, with the quantity per run for the distillation units; compressed air where a fluidised bed needs it, clean and dry; fume extraction over anything handling a solvent; and bench space that allows a column to be reached at top and bottom.
And if the steam distillation unit is on your list, settle the steam supply first. A steam generator is normally a registered pressure vessel subject to periodic inspection by a competent authority in the destination country, and that is a matter of arranging registration before commissioning rather than after. Ask us for the vessel certificate, drawings and relief settings with the quotation, and put them to your own authority before the equipment ships.
For each rig: the experiment and what is measured on each phase, with accuracies; for dryers, in-situ weighing and its resolution, air flow measurement, inlet temperature control and humidity measurement; for columns, wetted length and diameter, liquid distribution, and the analysis method at inlet and outlet; for diffusion, how the measurement is read and whether temperature is controlled; for extraction and adsorption, the solvent or adsorbent assumed, quantities per run, recovery, regeneration and the waste route; services required, including steam and its certification; time to a result, since several of these are project-length experiments; consumables and spares with prices; the worksheets supplied; mass, footprint and access; nominal voltage, frequency and plug pattern; and the warranty, commissioning and local service position. For any certification stated here, contact us for the latest copies of the relevant certificates before you tender on it.
Related ranges: momentum transfer lab equipment and the heat transfer lab range for the other two transport subjects, chemical reaction engineering for reactors, columns and unit operations, and process control and instrumentation for control. The full set is listed under mechanical lab equipments. For a quotation, send us your syllabus experiment list - on this page that is especially useful, because it lets us quote the mass transfer equipment and leave out the records that should not be in this category at all.
Six subjects: diffusion (vapour in air, liquid in liquid and solid in air), gas-liquid contacting (a wetted wall column and absorption in a wetted wall column), adsorption in a packed bed, drying (fluidised bed, rotary, and natural and forced draft tray dryers), extraction (solid-liquid and liquid-liquid, packed bed type) and distillation, including a steam distillation set-up. Records such as a shoe flex tester, a Martindale abrasion tester, a windmill machine and several friction and toggle joint rigs were copied in from other ranges and are mostly marked by a trailing digit. Ask for items by name and have each confirmed on the proforma invoice.
The drying curve plots moisture content against time and shows the constant-rate period, the critical moisture content and the falling-rate period. To get it, the sample must be weighed repeatedly without stopping the air flow, so ask whether it can be weighed in situ, by a balance under the tray or a suspended arrangement, and at what resolution; carrying a tray to a balance leaves holes in the curve. On the air side, ask how air flow is measured, how inlet temperature and humidity are read, by wet and dry bulb thermometers or a hygrometer, and whether air temperature can be set and held.
The column gives a gas-liquid mass transfer coefficient, and that depends entirely on the liquid film staying smooth and unbroken over the full wetted length. With poor liquid distribution the liquid channels, the film breaks, the real area becomes unknown and the coefficient is wrong. So ask how the liquid is distributed at the top, what the wetted length and diameter are, and how the gas is analysed at inlet and outlet. For the absorption version, ask which gas-liquid system the rig is designed for and what reagents the analysis needs, and leave bench space to reach the column at top and bottom.
Usually not. The vapour in air, liquid in liquid and solid in air apparatus measure a diffusivity, which is a slow measurement of a small change: a liquid level falling in a capillary over hours, or a conductivity rising as salt diffuses. Two things matter. Temperature must be stable, because diffusivity depends on it and the experiment runs long enough for a room to warm up. And the measurement must be readable, so ask how the level or concentration is read and at what resolution, and whether temperature is controlled. Treat these as good project experiments rather than short practicals.
The solid-liquid and liquid-liquid extraction units teach stage efficiency and the operating line, and they bring solvents into the laboratory. Ask which solvent the exercise assumes, whether it can be imported and stored where you are, how it is recovered and where the spent extract goes. Many extraction solvents are flammable, so site the units away from heaters and ignition sources, with fume extraction, an eyewash, a spill kit and a waste route agreed in writing before delivery. For the packed bed adsorption unit, ask what adsorbent is supplied, how effluent concentration is measured, and whether the bed can be regenerated.
The steam supply, first. A steam generator is normally a registered pressure vessel subject to periodic inspection by a competent authority in the destination country, and registration should be arranged before commissioning rather than after. Ask for the vessel drawings and relief settings with the quotation, contact us for the latest copies of the relevant certificates, and put them to your own authority before the equipment ships. Also settle the other services: earth-leakage protection on every outlet, cooling water supply and drain with the quantity per run for the distillation units, and clean, dry compressed air if a fluidised bed needs it.
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: 17 October 2026.
Specifications for the mass transfer rigs, including what is measured on each phase, in-situ weighing resolution, wetted length and diameter, the solvent or adsorbent assumed and the services required, are confirmed in writing on the quotation. For the steam generator and other documents, contact us for the latest copies of the relevant certificates. No price is quoted on this page. Listing note: this listing contains records copied in from other ranges, including a shoe flex tester, a Martindale abrasion tester, a windmill machine and several friction and toggle joint rigs, most marked by a trailing digit, plus a record named after the category itself; and the MTLE prefix is shared with momentum transfer lab equipment, where MTLE-0001 is a different product.
Mass Transfer Lab Equipment We hold skill in offering premium quality Mass Transfer Lab Equipment to our profitable clients. Accessible with us at sensible market costs, the mechanical assembly is generally used to ponder the procedure of mass move in different reactors. According to the necessities of our clients, this mechanical assembly can be specially crafted. Determinations: Weight: 120kg,150kg Dimensions(L*W*H): 86*41*35 cm Power: 350 w .
Mass Transfer with & without Chemical Reaction (strong fluid The setup comprises of a Reactor, in which strong chamber of Benzoic Acid is set and is blended by methods for a variable speed blender. Puzzles are additionally given. The Reactor is made of Stainless Steel. Peltilizer is given to make the strong barrel of Benzoic Acid. Steady temperature water shower course of action is given to direct the trial at different temperatures. EXPERIMENTATION: Dissolution of Benzoic corrosive in water: Kinetic examinations Dissolution of Benzoic corrosive with response in fluid NaOH arrangement. UTILITIES REQUIRED : Water Supply. Deplete. Power Supply: 1 Phase, 220 V AC, 0.5 kW. Instruments, Laboratory Glassware and Chemicals required for examination according to the framework received. Specialized DETAILS : Reactor : Material Stainless Steel, Capacity 2 Ltrs. (approx) Water Bath : Material Stainless Steel, Double Wall,nsulated with clay fiber fleece. Warmer : Nichrome Wire Heater Stirrer : Stainless Steel Impeller and shaft combined with DC engine drive for variable speed. Temperature Sensors : RTD PT-100 write. Control board involves : RPM Indicator : Digital, Non contact compose. Advanced Temp. Controller : 0-199.90C for heated water tank. With Standard make on/off switch, Mains Indicator & meld and so forth. Guideline Manual : An ENGLISH direction manual will be furnished alongside the Apparatus The setup is furnished with Peltilizer. The entire unit is gathered inflexibly on a base plate. The entire setup is all around outlined and plan in a decent quality painted structure. .
Basic Batch Distillation Set-up The hardware comprises of a refining still made of stainless steel. the bolster in the still is warmed remotely by radiator. The vapors frame the highest point of the vessel are dense in the sort condenser by flowing cooling water. Temperature of the bolster blend is controlled by methods for an advanced temp. controller. The condensate is gathered in a collector made of stainless steel. EXPERIMENTATION: To consider the qualities of Simple Distillation. To check of Reyleigh’s Equation UTILITIES REQUIRED : Electricity Supply : 1 Phase, 220 V AC, 2 kW. Water Supply : Continuous @ 4 LPM at 1 Bar Floor Drain. Required Chemicals. Specialized DETAILS : Flow estimation : Rotameter for icy water for condenser Distillation still : Made of Stainless Steel, limit 5 ltrs. Protected with fired fleece and cladding with Aluminum thwart. Condenser : Concentric Tube write made of Stainless Steel Distillate tank : Made of Stainless Steel, limit 2 Ltrs. Warmer : Nichrome wire radiator. Control board includes : Digital Temp. Controller : 0-199.9°C, RTD PT-100 compose (For Steam Generator) Digital Temp. Marker : 0-199.90C with multi-channel switch. Temp. Sensors : RTD PT-100 write With Standard make on/off switch, Mains Indicator Instruction Manual : An ENGLISH direction manual will be furnished alongside the Apparatus The entire set-up is very much planned and orchestrated in a decent quality painted structure. .
Vapor In Air Diffusion Apparatus Using a little example of the fluid in a thin vertical tube, and watching its rate of dissipation into stream of air go over the highest point of the tube can helpfully be utilized to think about the dispersion of vapor of an unstable fluid into air. The set up comprises of a glass tube put in a water shower. A flat glass tube is settled to the upper end of the tube and air is drawn through this by a little pneumatic machine included inside the unit. Wind streams over this tube keeping up incomplete weight contrast. A Traveling magnifying instrument with sliding vernier scale is given to quantify the rate of fall of dissolvable inside slim. A stirrer is fitted to keep up consistent temperature inside the shower. EXPERIMENTATION: Determination of the dissemination co-effective of a natural vapor in air. To think about the impact of temperature on dissemination co-proficient. UTILITIES REQUIRED : Electricity Supply : 1 Phase, 220 V AC, 0.6 kW. Required Chemicals & Laboratory Glassware. Table for setup bolster. Specialized DETAILS : Tube : Material Borosilicate Glass. Water Bath : Material Stainless Steel with two sides made of glass limit 8 Ltrs, Fitted with radiator and stirrer. Radiator : Nichrome Wire Heater. Stirrer : Stainless Steel, Impeller and shaft combined with FHP engine. Air Circulation : Air Pump. Voyaging Microscope : 0-150 x 0.1 mm determination. Temp. Sensor : RTD PT-100 compose Control board including: Digital Temp. Controller cum-Indicator (For Water Bath 0-199.9°C and Standard make On/off switch, Mains Indicator and so on. Direction Manual : An ENGLISH guideline manual will be given alongwith the Apparatus The entire set-up is mounted on a powder covered base plate.
Vapor-Liquid Equilibrium Set-up The fundamental information of any refining issue are the harmony between the fluid and vapor periods of the framework subjected to refining. Consequently is of extraordinary significance to examine the vapor-fluid balance. The set-up comprises of refining still with a warming component. An electrical Dimmerstat is associated with warming component for differing heat input. The vapors frame the highest point of section are dense in the shell and tube write condenser by circling cooling water. The condensate is gathered in reflux drum and input to section as reflux. A tank with pump is given to course frosty water to condenser. Stream rates can be directed through control valve fitted. Instrumentation is given to gauge the temperatures at various focuses. EXPERIMENTATION: ØØ To decide the vapor Liquid Equilibrium bend for CCl4 and Toluene or some other blend. UTILITIES REQUIRED : ØØ Water Supply. ØØ Drain. ØØ Electricity Supply : 1 Phase, 220 V AC, 1.5 kW. ØØ Refractrometer for Analysis. ØØ Required Chemicals. Specialized DETAILS : qq Distillation still : 1 Ltrs. Limit, made of Stainless Steel. nsulated by fired fleece. qq Condenser : Concentric Tube write. qq Heater : Nichrome wire qq Cooling Water Tank : Material Stainless Steel , Capacity 15 Ltrs. Approx. qq Cold Water dissemination : Using FHP Pump. qq Temperature Sensors : RTD PT-100 write qq Control board involving Digital Voltmeter : 0-300 Volt. Dimmerstat : 0-230 V, 2A. Computerized Temp. pointer : 0-199.90C RTD PT-100 Type with multi-channel switch With standard make on/off switch, Mains Indicator and so on qq Instruction Manual : An ENGLISH direction manual will be furnished alongside the Apparatus qq The entire set-up is mounted on a powder covered base plate .
Wetted Wall Column The set up comprises of a glass segment. Water is encouraged at the highest point of the section along the dividers to make the segment a wetted divider segment. Hot air from warming load with known dampness is permitted to go through the segment vertically upward and dissipation in the fluid film around the divider happens. The stream rates of water and air can be autonomously shifted to mimic diverse conditions. Instrumentation is given to gauge the dry and wet globule temperatures at air delta and outlet. EXPERIMENTATION: To decide the gas film coefficient in a wetted divider section utilizing air-water framework. To locate the mass exchange coefficient UTILITIES REQUIRED : Compressed Air Supply at 2 Bar, 4 CFM. Water supply. Deplete. Power Supply : 1 Phase, 220 V AC, 0.5 kW. Specialized DETAILS : Column : Borosilicate Glass Dia 45 mm, Length 1000 mm (approx.) Water Circulation : FHP Pump. Water Tank : Material Stainless Steel, Capacity 20 Ltrs. Warming Chamber : Compatible limit. Warmer : Nichrome wire radiator Rotameter : For water stream rate estimation. Dry & wet Bulb Temp. : With Digital Temperature Indicator. Temperature Sensors : RTD PT-100 Type. Control board includes : Digital Temp. Pointer : 0-199.90C, RTD PT-100 compose with multi-channel switch. Standard make on/off switch, Mains Indicator and so forth. Guideline Manual : An ENGLISH direction manual will be given along the Apparatus The entire set-up is very much outlined and orchestrated in a decent quality painted structure. .
We are a notable business association, which encourages its regarded supporters with Tray Dryer. These dryers are designed by our talented architects, utilizing ideal quality crude material and associated parts. Agreeing to universal quality gauges, these items are guaranteed for their reliable execution, consumption and scraped area opposition and longer serviceability. Also, before dispatching these from our premises, we test these on strict parameters.
Bureau of the dryer will be of 12/24/48/96 Trays limit, produced using MS point casing of twofold divider development fixed inside with 18 SWG and remotely 18 SWG MS sheet. The pit framed in the middle of twofold divider will be legitimately protected with 60 mm thick Glass fleece to keep warm misfortunes from dryer.
Substantial obligation impermeable pivoted entryways produced using 16 SWG MS sheet sponsored by 50 mm Glass fleece on the inward side and ball find locking course of action together with 40 mm asbestoses gasket rope guarantee exceptionally durable development of the dryer.
Air inside the dryer is coursed by one overwhelming obligation hub stream S.S.304 or aluminum blower fitted on a pole of and driven by l H.P. through belt. The uncommon plan of the Blower guarantees uniform air flow so that there is uniform air current over the whole charge stacked in the Trolley inside the dryer. The working of the engine is shown by lights in the control board.
Plate will be made from 1.6 mm SS 304 sheets. Its measurements are 32" x 16" x 1 l/4". The Trays have adjusted corners with' reflect complete from inside and outside. SS 316 quality is accessible on request.
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