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.
Highlights Self-contained. Seat mounted. Interesting assurance of coefficient of sliding grating. Examination of single symphonious movement. of swaying bar. Check of condition of movement. Three year guarantee. Scope of Experiments To decide the coefficient of sliding grating between the gentle steel haggles bar of different materials. To confirm the condition of movement for the swaying bar. To ponder the meaning of an impact line for shear compel. To explore the impact of the vertical position of the bar focal point of gravity. Depiction A variable speed electric engine drives two pivoting wheels on which an example bar wavers with a solitary symphonious movement because of the even weight that it applies on each wheel thusly. The bar recurrence is subject to the coefficient of sliding contact. Various example bars of various materials are given. The separation between the two wheels can be shifted. A stop watch is given. This hardware 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 test scope without unduly entangling or trading off the outline. Each bit of mechanical assembly is independent and conservative. Setting up time is insignificant, and all estimations are made with the easiest conceivable instrumentation, so the understudy inclusion is absolutely with the designing standards being instructed. An entire guideline manual is given depicting the mechanical assembly, its application, test strategy and run of the mill test comes about..
Highlights Low cost, powerful instructing. Honest to goodness business item, altered. Variable number of sharp edges. Variable edge. Assurance of energy yield and proficiency. Requires wellspring of wind. Three year guarantee. Scope of Experiments To decide the electrical power yield and slowing down point for a windmill over a scope of Wind speed Blade Angle Number of Blades To explore the impact of sharp edge slow down v. control yield To decide the electrical and mechanical efficiencies of the windmill for an indistinguishable factors from in (1). Portrayal The windmill is an adjusted rendition of a little business machine utilized for yachts and nation bungalows. It has six plastic aerofoil formed cutting edges mounted in an empty center point which contains an arrangement of perpetual magnets and a circled conductive winding. At the point when the factory turns, a rotating voltage is produced. Windings are mounted on a circle, which is settled to a pole running in course. This pole is limited by a phosphor bronze spring, strain checked to gauge torque. An inductive transducer is utilized to gauge rotor speed. From these outcomes the mechanical power can be set up. Electrical power yield is estimated as far as the yield voltage over a variable load. The six cutting edges are mounted in flexible supervisors with the goal that their pitch can be changed. Cutting edges can likewise be expelled to survey the impact of sharp edge strength. A wellspring of wind is required. This can be given by the Wind Machine. This hardware is a piece of a range intended to both exhibit and tentatively affirm fundamental designing standards. Awesome care has been given to every thing to give wide test scope without unduly entangling or trading off the outline. Each bit of contraption is independent and reduced. Setting up time is negligible, and all estimations are made with the least complex conceivable instrumentation, so the understudy inclusion is simply with the designing standards being instructed. An entire guideline manual is given portraying the device, its application, trial method and run of the mill test comes about..
Fluid in Liquid Diffusion Apparatus The setup contains every vital accomplice to decide the dispersion coefficient of segments in the fluid stage. The discourse cell is an all around composed one to maintain a strategic distance from any blunder amid equimolal counter current dissemination between fluids of various focus on each side of the cell. The dissemination vessel is of astounding Borosilicate Glass with a permeable cell made up of earthenware. The Concentration of Solution is definitely 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 shift the temperature and RPM to figure the rate of dispersion at various temperature and blending level Experiments Determination dissemination coefficient To think about 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 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.
Clump Crystallizer The set-up is intended to exhibit 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-overlap premise; a gem shaped from a sullied arrangement is itself unadulterated. The setup comprises of an open, jacketed and funnel shaped base vessel fitted with a low RPM instigator and a warmer. Game plan for Cooling water course and stream estimation in coat is made by utilizing stockpiling write water tank, a pump and a rotameter. The bolster/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 course of cooling water and precious stones are shaped. Important instrumentation is improved the situation temp estimation Experiments To consider 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 legitimate earthing. 5A, three stick attachment with switch for Mass Transfer Lab Apparatus lab gear manufacturers,exporters and Mass Transfer Lab Apparatus Lab providers.
Highlights Low cost, compelling showing Self-contained Bench mounted 4 grating materials provided as standard Other materials accessible Determination of coefficient of sliding and static grinding Three year guarantee Range of Experiments To decide the coefficient of contact under static and sliding conditions between different materials and steel To confirm the point of rubbing for the material To gauge the power required to move a body up a slanted plane against gravity and erosion Description The 600mm stainless steel plane can be secured any precise position between ±45°, demonstrated on a semi-round protractor scale. Four slider plate are provided having nylon, metal, aluminum and brake lining material bases. Every plate thus is joined to a weight holder and weights are included until the plate just starts to slide. The analysis may likewise be utilized as an activity in balance of powers, deciding the power required to move the plate along the plane giving the coefficient of contact. This gear is a piece of a range intended to both exhibit and tentatively affirm fundamental designing standards. Awesome care has been given to every thing in order to give wide trial scope without unduly muddling or bargaining the outline. Each bit of device is independent and reduced. Setting up time is insignificant, and all estimations are made with the least complex conceivable instrumentation, so the understudy association is simply with the designing standards being instructed. A total guideline manual is given portraying the contraption, its application, exploratory method and normal test outcomes..
Straightforward Batch Distillation Set-up The gear comprises of a refining still made of stainless steel. the bolster in the still is warmed remotely by warmer. The vapors shape the highest point of the vessel are consolidated in the sort condenser by circling cooling water. Temperature of the sustain blend is controlled by methods for a computerized temp. controller. The condensate is gathered in a recipient 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 frosty water for condenser Distillation still : Made of Stainless Steel, limit 5 ltrs. Protected with clay fleece and cladding with Aluminum thwart. Condenser : Concentric Tube compose made of Stainless Steel Distillate tank : Made of Stainless Steel, limit 2 Ltrs. Radiator : Nichrome wire warmer. Control board involves : Digital Temp. Controller : 0-199.9°C, RTD PT-100 compose (For Steam Generator) Digital Temp. Pointer : 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 guideline manual will be furnished alongside the Apparatus The entire set-up is very much outlined and orchestrated in a decent quality painted structure.
Highlights Low cost, powerful showing Self-contained Bench mounted Reinforces ideas of work and vitality Direct perusing of unrelated exertion Three year guarantee Range of Experiments To acquire the exploratory connection amongst exertion and separation moved by exertion, and to contrast with a hypothetical forecast With demonstrate that the work done is the region under a diagram of load against remove moved Description This investigation is intended to strengthen the general rule that the work done, especially by a variable power, can be resolved just by estimating the zone under the chart of power and separation moved. The hardware is intentionally straightforward with the goal that ideas are promptly gotten a handle on. It is a buddy 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 shown by a protractor scale. The exertion is the power expected to hold the weighted arm at a specific edge. This can be rehashed for a few unique weights. This hardware is a piece of a range intended to both exhibit and tentatively affirm essential building standards. Extraordinary care has been given to every thing to give wide exploratory degree without unduly muddling or trading off the outline. Each bit of device is independent and smaller. Setting up time is negligible, and all estimations are made with the easiest 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, exploratory methodology and run of the mill test comes about..
Swenson Walker Crystallizer The set-up is intended to exhibit and invigorate the marvels of crystallization. Swenson Walker crystallizer is a consistent sort crystallizer. This activity includes both warmth and mass exchange. Crystallization is the arrangement of strong particles inside a homogeneous stage. Its wide utilize has a two-overlay premise; a precious stone shaped from a sullied arrangement is itself unadulterated. The setup comprises of a best open jacketed round base trough. A strip blender is given in crystallizer trough, which pivots at low rpm for fomentation of immersed arrangement. The immersed arrangement is set up in a tank fitted with warmer and a stirrer. This hot soaked 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 bolster tank making the procedure consistent. The precious stones dregs at the base of the trough, and can be washed out toward the finish of process. Plan for Cooling water course and stream estimation in coat is made by utilizing stockpiling compose 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 gem yield and the effectiveness 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.
Wetted Wall Column The set up comprises of a glass section. Water is encouraged at the highest point of the segment along the dividers to make the segment a wetted divider section. Hot air from warming load with known mugginess is permitted to go through the section vertically upward and vanishing in the fluid film around the divider happens. The stream rates of water and air can be autonomously fluctuated to recreate diverse conditions. Instrumentation is given to quantify the dry and wet globule temperatures at air gulf and outlet. EXPERIMENTATION: To decide the gas film coefficient in a wetted divider segment 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. Radiator : Nichrome wire warmer 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 write 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 planned and masterminded in a decent quality painted structure. .
Vapor In Air Diffusion Apparatus Diffusivity of the vapors is resolved technique in which fluid is permitted to dissipate in a graduated vertical glass tube over the highest point of which a surge of air is passed. The setup contains every single vital accomplice to decide the dispersion coefficient of vapors (fluid) in air stage. The dispersion vessel is of great Borosilicate Glass with a T compose 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 figure the rate of dispersion at various temperature. The Air Flow stream is created utilizing smaller than expected 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 legitimate 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
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