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.
Martindale Abrasion Tester - Determination of opposition of any texture to scraped spot is normally done by rubbing the texture under indicated conditions against a standard abradant. Albeit plane scraped area of texture surface does not cover all parts of strains that are vital in deciding administration life, there are events when such a test gives helpful data. One of the standard gear utilized for this assurance is the Martindale Abrasion Tester. This contraption gives a controlled measure of scraped area between texture surfaces at nearly low weights in ceaselessly altering course. Round examples of texture are rubbed under known weights under a movement which is the resultant of two straightforward symphonious movements at right point to each other. The protection from scraped area is assessed by visual appearance or by finding the misfortune in mass of the examples. common lab types of gear makers.
Fluid in Liquid Diffusion Apparatus The setup contains every single fundamental assistant to decide the dissemination coefficient of segments in the fluid stage. The discourse cell is an all around composed one to stay away from any blunder amid equimolal counter current dispersion between fluids of various fixation on each side of the cell. The dissemination vessel is of top notch Borosilicate Glass with a permeable cell made up of clay. The Concentration of Solution is exactly estimated with an exactness Conductivity meter gave along the setup. The vessel is mounted over a Magnetic Stirrer cum hot plate of Superior quality gave controls for fluctuate the temperature and RPM to compute the rate of dissemination at various temperature and blending level Experiments Determination dispersion coefficient To examine the impact of temperature on dissemination co-productive Features Superb Painted structure Simple to work and keep up Compact and remain solitary set up Utilities Required Electric supplyProvide 230/ - 10 VAC, 50 Hz, single stage electric supply with legitimate earthing. 5A, three stick attachment with switch for Hot plate and conductivity meter Chemicals for trial according to your decision Mass Transfer Lab Apparatus lab hardware manufacturers,exporters and Mass Transfer Lab Apparatus Lab providers
Steam Distillation Set Up The hardware comprises of jacketed weight vessel for refining. Steam from a steam generator can either be permitted to enter 'in the external coat or in the vessel. The vapors frame the highest point of the vessel are dense in the shell and tube write condenser by coursing cooling water provided by research center overhead tank. The condensate is colleted in an isolating chamber. The set-up is fitted with steam trap control valves weight measure, temperature sensors and different instrumentations expected Experiments To examine the Packed Distillation Column Features Stainless Steel tanks and wetted parts Superb Painted structure Simple to work and keep up Compact and remain solitary set up Utilities Required Water Supply 2 LPM at 5 m head Drain Electricity Supply: 1Phase, 220 V AC, 6.5 kW Required Chemicals Refractrometer for examination Mass Transfer Lab Apparatus lab gear manufacturers,exporters and Mass Transfer Lab Apparatus Lab providers
Vapor In Air Diffusion Apparatus Diffusivity of the vapors is resolved strategy in which fluid is permitted to vanish in a graduated vertical glass tube over the highest point of which a flood of air is passed. The setup contains every single essential accomplice to decide the dissemination coefficient of vapors (fluid) in air stage. The dispersion vessel is of excellent Borosilicate Glass with a T write dissemination tube engraved in mm scale for level readings. The vessel is mounted over a Magnetic Stirrer cum hot plate of Superior quality gave controls for change the temperature and RPM to ascertain the rate of dispersion at various temperature. The Air Flow stream is created utilizing little vacuum apparatus Experiments Determination dissemination coefficient for fluid/vapor in air framework Features Superb Painted structure Simple to work and keep up Compact and remain solitary set up Utilities Required Electric supplyProvide 230/ - 10 VAC, 50 Hz, single stage electric supply with appropriate earthing. 5A, three stick attachment with switch for Compressor Chemicals for trial Acetone/CCl4 (Or according to your decision) Mass Transfer Lab Apparatus lab gear manufacturers,exporters and Mass Transfer Lab Apparatus Lab providers
Clump Crystallizer The set-up is intended to show and fortify the marvels of crystallization. This activity includes both warmth and mass exchange. Crystallization is the development of strong particles inside a homogeneous stage. Its wide utilize has a two-crease premise; a gem framed from a debased arrangement is itself unadulterated. The setup comprises of an open, jacketed and cone shaped base vessel fitted with a low RPM instigator and a radiator. Course of action for Cooling water dissemination and stream estimation in coat is made by utilizing stockpiling write water tank, a pump and a rotameter. The nourish/mother alcohol is set up in the crystallizer vessel itself utilizing warmer and stirrer. The hot super immersion arrangement in the crystallizer is then cooled by flow of cooling water and precious stones are shaped. Fundamental instrumentation is improved the situation temp estimation Experiments To examine the execution of a Batch Crystallizer Features Superb Painted structure Simple to work and keep up Compact and remain solitary set up Utilities Required Electric supplyProvide 230/ - 10 VAC, 50 Hz, single stage electric supply with appropriate earthing. 5A, three stick attachment with switch for Mass Transfer Lab Apparatus lab gear manufacturers,exporters and Mass Transfer Lab Apparatus Lab providers
Ingestion In Wetted Wall Column The set up comprises of glass segment, sustain tank, CO2 chamber with controller, air controller with weight check. Rotameter, accepting plate and funneling. Metered amount of liquid is disseminated alongside the dividers of segment from the best while metered gas and wind current is gone through the bed vertically upwards. The gas air blend is invested in the fluid. All the stream rates can be freely shifted to mimic diverse conditions and by estimating the convergence of gas ingested in the fluid the general volumetric mass exchange coefficients can be computed. Trials Determination of general gas exchange coefficient Features Continuous activity Superb Painted structure Simple to work and keep up Compact and remain solitary set up Stainless Steel tanks and wetted parts Utilities Required Electric supplyProvide 230 +/ - 10 VAC, 50 Hz, single stage electric supply with appropriate earthing. 5A, three stick attachment with switch for Compressor Chemicals for trial Sodium Hydroxide (NaOH)- 40gm, Hydrochloric Acid (HCl) 1N-500ml, Barium Chloride (BaCl2) - 100gm, Phenolphthalein pointer 10ml, Methyl orange marker 10ml (Or according to your decision) Compressed Air supply utilizing a compressor: Clean, oil and dampness free air, weight 5 Bar. Water Supply and Drain as required Mass Transfer Lab Apparatus lab gear manufacturers,exporters and Mass Transfer Lab Apparatus Lab providers
Strong In Air Diffusion Apparatus The set up comprises of glass segment, pressing material, air rotameter and channeling. Metered amount of wind current is gone through the stuffed bed vertically upwards. The stream rate can be autonomously changed to recreate distinctive conditions utilizing rotameter. Naphthalene wads of known weight and width are utilized to frame the pressed bed for the count of mass exchange co-productive of vaporization in air Experiments To compute the mass exchange co-effective of vaporization of naphthalene in air utilizing a stuffed bed of round particles of naphthalene Features Superb Painted structure Simple to work and keep up Compact and remain solitary set up Utilities Required Electric supplyProvide 230 +/ - 10 VAC, 50 Hz, single stage electric supply with appropriate earthing. 5A, three stick attachment with switch for Mini Air Compressor Chemicals for trial Naphthalene Balls (Or according to your decision) Air supply: Clean, oil and dampness free air, weight 2 Bar Weighing Balance 0.1gm determination Mass Transfer Lab Apparatus lab hardware manufacturers,exporters and Mass Transfer Lab Apparatus Lab providers
Swenson Walker Crystallizer The set-up is intended to exhibit and animate the marvels of crystallization. Swenson Walker crystallizer is a constant sort crystallizer. This task includes both warmth and mass exchange. Crystallization is the development of strong particles inside a homogeneous stage. Its wide utilize has a two-crease premise; a precious stone shaped from a debased arrangement is itself unadulterated. The setup comprises of a best open jacketed round base trough. A strip blender is given in crystallizer trough, which turns at low rpm for fomentation of soaked arrangement. The soaked arrangement is set up in a tank fitted with warmer and a stirrer. This hot immersed arrangement is encouraged toward one side of the crystallizer and streams gradually towards the opposite end while being cooled and is permitted to stream back in hot nourish tank making the procedure ceaseless. The gems silt at the base of the trough, and can be washed out toward the finish of process. Course of action for Cooling water dissemination and stream estimation in coat is made by utilizing stockpiling write water tank, a pump and a rotameter. Vital instrumentation is improved the situation temp estimation Experiments To examine the execution of a Swanson Walker Crystallizer To decide the precious stone yield and the proficiency of crystallizer Features Superb Painted structure Simple to work and keep up Compact and remain solitary set up Utilities Required Chemicals business review material according to decision Mass Transfer Lab Apparatus lab hardware manufacturers,exporters and Mass Transfer Lab Apparatus Lab providers
Bunch Crystallizer Crystallization is the arrangement of strong particles inside a homogeneous period of immersed fluid. Its wide utilize has a two-overlay premise, a gem shaped from an unclean arrangement is itself unadulterated and crystallization bears a viable technique for isolating w. This task includes both warmth and mass exchange. Cooling compose disturbed group crystallizer set up comprises of an open jacketed mixed vessel gave water warming & cooling course of action. The sustain is set up in the crystallizer itself with high temp water and stirrer. The hot immersed arrangement in the crystallizer is then cooled by flow of cooling water and precious stones are shaped. EXPERIMENTATION: To examine the execution of a Batch Crystallizer. To decide the precious stone yield and the proficiency of crystallizer. UTILITIES REQUIRED : Water Supply. Deplete. Power Supply : 1 Phase, 220 V AC, 1.5 kW. Required Chemicals. Specialized DETAILS : Crystallizer (Jacketed Type): Material Stainless Steel , Cap. 2 Ltrs. with conelike base Stirrer : FHP, Variable Speed. Warmer : Nichrome wire radiator Cooling Water Tank : Material Stainless Steel , Capacity 30 liter fitted with Pump. Stream estimation : Rotameter for cooling water. Pump : FHP. Accepting Tank : Material Stainless Steel , Capacity 2 liter with SS strainer Temp. Sensors : RTD PT-100 compose Control board involves :Digital Temp. Marker : 0-199.90C with multi-channel switch and 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 all around outlined and masterminded in a decent quality painted structure .
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