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.
Steam Distillation Set Up The gear 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 shape the highest point of the vessel are consolidated in the shell and tube write condenser by coursing cooling water provided by research facility overhead tank. The condensate is colleted in an isolating chamber. The set-up is fitted with steam trap control valves weight check, 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 hardware manufacturers,exporters and Mass Transfer Lab Apparatus Lab providers
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 spot of texture surface does not cover all parts of strains that are essential in deciding administration life, there are events when such a test gives helpful data. One of the standard hardware utilized for this assurance is the Martindale Abrasion Tester. This mechanical assembly gives a controlled measure of scraped spot between texture surfaces at similarly low weights in persistently altering course. Roundabout examples of texture are scraped under known weights under a movement which is the resultant of two basic symphonious movements at right edge to each other. The protection from scraped spot is assessed by visual appearance or by finding the misfortune in mass of the examples. common lab supplies makers.
Highlights Low cost, successful educating. Independent. Divider mounted. Scope of turn edges provided. Discretionary orientation accessible. Assurance of coefficient of grinding. Three year guarantee. Scope of Experiments To research the connection between frictional torque and hub push. To decide the impact of the bearing cone point. To acquire the coefficient of contact for various direction. Portrayal The device comprises of a pivoting roundabout table on a vertical shaft. An assortment of end turns can be joined to the lower end of the pole. The unit turns on an exchangeable seating chose to coordinate the center edge of the rotate. Unadulterated torsion is connected to the table through a couple of oppositely inverse stacked lines and pulleys. The push on the bearing can be shifted by adding weights to the table. This gear is a piece of a range intended to both exhibit and tentatively affirm essential designing standards. Awesome care has been given to every thing in order to give wide exploratory degree without unduly entangling or trading off the outline. Each bit of mechanical assembly is independent and smaller. Setting up time is insignificant, and all estimations are made with the most straightforward conceivable instrumentation, so the understudy contribution is absolutely with the building standards being educated. A total direction manual is given portraying the contraption, its application, trial system and commonplace test outcomes..
Fluid in Liquid Diffusion Apparatus The setup contains every single fundamental accomplice to decide the dissemination coefficient of segments in the fluid stage. The exchange cell is an all around outlined one to keep away from any mistake amid equimolal counter current dissemination between fluids of various fixation on each side of the cell. The dissemination vessel is of amazing Borosilicate Glass with a permeable cell made up of artistic. The Concentration of Solution is exactly estimated with an exactness Conductivity meter furnished alongside the setup. The vessel is mounted over a Magnetic Stirrer cum hot plate of Superior quality furnished with controls for change the temperature and RPM to ascertain the rate of dissemination at various temperature and blending level Experiments Determination dispersion coefficient To contemplate the impact of temperature on dissemination co-proficient 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 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
Highlights Designed for use with little Windmills. Variable breeze speed. Sensibly uniform breeze speed appropriation. Whirl free. Fan clamor hushed. Three year guarantee. Scope of Experiments Not straightforwardly material, however the breeze stream must be adjusted before utilize. 32 Wind speed readings dispersed over the stream must be gotten from which the normal breeze speed is resolved, for a scope of wind speeds. Depiction Designed to coordinate the Windmill, the breeze machine builds up a breeze stream of 1000mm ostensible breadth at a scope of velocities upto 10m/s. Wind speed dissemination is sensibly uniform, and silencers are fitted to decrease the clamor from the recycling fan. The breeze is created by an eight cutting edge pivotal stream fan driven by a three stage variable speed, six post electric engine. A stator and honeycomb diffuser are introduced downstream of the fan to diminish wind twirl. The Windmill can be appended to the centralized computer of the breeze machine . This hardware is a piece of a range intended to both exhibit and tentatively affirm fundamental designing standards. Extraordinary care has been given to every thing in order to give wide exploratory extension without unduly entangling or bargaining the plan. Each bit of device is independent and minimal. Setting up time is negligible, and all estimations are made with the least complex conceivable instrumentation, so the understudy contribution is absolutely with the designing standards being instructed. A total direction manual is given portraying the mechanical assembly, its application, exploratory system and run of the mill test comes about..
Strong In Air Diffusion Apparatus The set up comprises of glass section, pressing material, air rotameter and channeling. Metered amount of wind stream is gone through the pressed bed vertically upwards. The stream rate can be autonomously shifted to reenact distinctive conditions utilizing rotameter. Naphthalene wads of known weight and distance across are utilized to shape the pressed bed for the estimation of mass exchange co-effective of vaporization in air Experiments To compute the mass exchange co-productive 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 gear manufacturers,exporters and Mass Transfer Lab Apparatus Lab providers
Highlights Low-practical instructing. Independent. Divider mounted. Variable edge of lap. 4 diverse vee edges. Assurance of coefficient of rubbing. Check of belt strain law. Three year guarantee. Scope of Experiments To explore the proportion of belt pressures when a rope ignores pulleys of various Vee edge To decide the coefficient of contact between the steel pulley and cotton rope. To evaluate the variety of belt pressure proportion with lap edge. Portrayal The contraption comprises of a divider mounted settled pulley with a stacked belt. Four diverse pulleys are provided with various vee groove edges; level edge, 120°, 90°, and 60°. A heap is added to one of two holders until the rope just starts to slide. This is the datum condition. Burdens are currently added to the two sides of the rope to cause moderate sliding of the rope. This empowers the coefficient of contact to be gotten. The point of lap can be effortlessly varied.This hardware is a piece of a range intended to both exhibit and tentatively affirm essential building standards. Awesome care has been given to every thing in order to give wide exploratory extension without unduly confusing or bargaining the outline. Each bit of contraption is independent and smaller. Setting up time is insignificant, and all estimations are made with the least complex conceivable instrumentation, so the understudy association is absolutely with the building standards being instructed. An entire guideline manual is given depicting the device, its application, trial methodology and run of the mill test comes about..
Highlights Low cost, viable educating. Independent. Divider mounted. Brake lining contact material. Variable plate weight. 3 measurements of contact plate. Assurance of coefficient of rubbing. Three year guarantee. Scope of Experiments To decide the coefficient of rubbing of the plate material. To demonstrate that the base torque to keep up revolution is relative to the hub load and measurement of the contact plate. Depiction The divider mounted mechanical assembly involves a lower stationary plate with grating circles and an aluminum compound plate whose pole turns in metal rollers yet which is in coordinate contact with the stationary plate. The base power on the rubbing circle is the self weight of the upper plate, yet the contact weight can be expanded by adding weights to the upper plate. Unadulterated torque is connected to the upper plate through two stacked strings and pulleys. Three exchangeable grating circles are provided of various distances across. This hardware is a piece of a range intended to both exhibit and tentatively affirm essential designing standards. Extraordinary care has been given to every thing to give wide exploratory degree without unduly confounding or trading off the outline. Each bit of device is independent and minimal. Setting up time is negligible, and all estimations are made with the easiest conceivable instrumentation, so the understudy contribution is simply with the building standards being instructed. An entire direction manual is given portraying the contraption, its application, exploratory technique and average test outcomes.
Highlights Low cost, powerful instructing. Independent. Seat mounted. Coordinate estimation of level response. Edge of flip variable. Shows utilization of. speed graphs. Three year guarantee. Scope of Experiments To decide the trial level response because of stacking. To contrast and hypothetical expectations, for example, the speed graph procedure. To survey the impact of the flip point. Depiction This contraption is intended to assess powers inside a flip instrument. Load is connected to the two sets of connections by a holder suspended from their associating turn. One end of the connections is rotated to a base, and the opposite end can move sideways on low grinding metal ball wheels. The moving connections are controlled by a flat spring balance, which measures the level response straightforwardly. The point of the flip can be fluctuated. Change is accommodated restoring the geometry of the stacked flip to its unique emptied state before taking estimations. The supporting pieces are not provided. There are numerous manners by which the powers can be resolved hypothetically. The direction sheet furnished with the mechanical assembly accepts the open door to present the utilization of speed charts to tackle basically static issues by considering virtual movement. Be that as it may, different systems can be utilized if wanted. This gear is a piece of a range intended to both exhibit and tentatively affirm fundamental designing standards. Incredible care has been given to every thing in order to give wide exploratory degree without unduly confusing or trading off the plan. Each bit of device is independent and reduced. Setting up time is insignificant, and all estimations are made with the most straightforward conceivable instrumentation, so the understudy inclusion is simply with the building standards being educated. A total guideline manual is given portraying the contraption, its application, trial system and regular test outcomes.
Highlights Low cost, compelling showing Self-contained Bench mounted Reinforces ideas of work and vitality Direct perusing of unrelated exertion Three year guarantee Range of Experiments To get the test connection amongst exertion and separation moved by exertion, and to contrast with a hypothetical expectation With demonstrate that the work done is the territory under a diagram of load against remove moved Description This examination is intended to fortify the general rule that the work done, especially by a variable power, can be resolved basically by estimating the zone under the chart of power and separation moved. The gear is intentionally straightforward so ideas are promptly gotten a handle on. It is a friend examination to HFC6, which is worried about the work done by accessible vertical power. A turned arm conveying a weight at its end is limited by a spring balance at right edges to the arm. The rakish position of the arm is demonstrated by a protractor scale. The exertion is the power expected to hold the weighted arm at a specific point. This can be rehashed for a few distinct weights. This hardware is a piece of a range intended to both show and tentatively affirm fundamental building standards. Incredible care has been given to every thing in order to give wide exploratory extension without unduly convoluting or trading off the outline. Each bit of device is independent and minimal. Setting up time is negligible, and all estimations are made with the least complex conceivable instrumentation, so the understudy contribution is simply with the designing standards being educated. A total direction manual is given portraying the mechanical assembly, its application, trial strategy and normal test outcomes..
Login
Register
+91 9817319615
