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.
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 incredible significance to think about the vapor-fluid harmony. 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 consolidated in the shell and tube compose condenser by circling cooling water. The condensate is gathered in reflux drum and criticism to section as reflux. A tank with pump is given to course frosty water to condenser. Stream rates can be controlled through control valve fitted. Instrumentation is given to quantify 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 clay fleece. qq Condenser : Concentric Tube compose. qq Heater : Nichrome wire qq Cooling Water Tank : Material Stainless Steel , Capacity 15 Ltrs. Approx. qq Cold Water flow : Using FHP Pump. qq Temperature Sensors : RTD PT-100 compose qq Control board containing Digital Voltmeter : 0-300 Volt. Dimmerstat : 0-230 V, 2A. Advanced Temp. marker : 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 guideline manual will be given along the Apparatus qq The entire set-up is mounted on a powder covered base plate .
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 mixed by methods for a variable speed blender. Bewilders 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 lead the examination at different temperatures. EXPERIMENTATION: Dissolution of Benzoic corrosive in water: Kinetic investigations Dissolution of Benzoic corrosive with response in watery 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 compose. Control board includes : RPM Indicator : Digital, Non contact write. Advanced Temp. Controller : 0-199.90C for high temp water tank. With Standard make on/off switch, Mains Indicator & combine and so forth. Direction Manual : An ENGLISH guideline 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 very much composed and course of action in a decent quality painted structure.
Martindale Abrasion Tester - Determination of obstruction of any texture to scraped spot is typically 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 valuable data. One of the standard hardware utilized for this assurance is the Martindale Abrasion Tester. This contraption gives a controlled measure of scraped spot between texture surfaces at similarly low weights in persistently altering course. Round examples of texture are scraped under known weights under a movement which is the resultant of two basic symphonious movements at right point to each other. The protection from scraped spot is evaluated by visual appearance or by finding the misfortune in mass of the examples. common lab supplies producers.
Highlights Low cost, powerful showing Self-contained Bench mounted 4 grating materials provided as standard Other materials accessible Determination of coefficient of sliding and static contact Three year guarantee Range of Experiments To decide the coefficient of grinding under static and sliding conditions between different materials and steel To check the point of rubbing for the material To quantify 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 rakish 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 appended to a weight holder and weights are included until the plate just starts to slide. The examination 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 grinding. This gear is a piece of a range intended to both show and tentatively affirm fundamental building standards. Extraordinary care has been given to every thing in order to give wide trial scope without unduly convoluting or trading off the plan. Each bit of mechanical assembly 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 educated. A total guideline manual is given depicting the mechanical assembly, its application, test technique and run of the mill test comes about..
Highlights Low-financially savvy instructing. Independent. Divider mounted. Variable edge of lap. Level, round and vee belts. Assurance of coefficient of grating. Check of belt strain law. Three year guarantee. Scope of Experiments To watch the connection between the pressures in the two sides of a belt To survey the contrasts between Vee, rope, and level belts To decide the coefficient of contact between the pulley and belt for the belt segments To examine the impact of edge of lap Description The device comprises of a divider mounted pulley with a stacked belt. The pulley is made of aluminum and has two machined sections to suit a level Vee belt, and a rope. For a given belt pressure and point of lap, a turning minute can be connected by adding weights to the pulley drive holder. The thought is to decide the torque which worthy motivations the pulley to turn, thus to discover the proportion of the belt strains. This empowers the belt strain condition to be confirmed and the coefficient of grating to be resolved. The edge of lap can be effortlessly fluctuated. 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 trial scope without unduly confusing or trading off the plan. Each bit of mechanical assembly is independent and smaller. Setting up time is negligible, and all estimations are made with the most straightforward conceivable instrumentation, so the understudy contribution is absolutely with the designing standards being instructed. An entire direction manual is given portraying the mechanical assembly, its application, trial system and regular test outcomes..
Highlights Low cost, viable instructing. Independent. Seat mounted. Coordinate estimation of even response. Point of flip variable. Shows use of. speed outlines. Three year guarantee. Scope of Experiments To decide the exploratory flat response because of stacking. To contrast and hypothetical forecasts, for example, the speed graph method. To survey the impact of the flip point. Portrayal This mechanical assembly 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 contact metal ball wheels. The moving connections are controlled by an even spring balance, which measures the level response straightforwardly. The point of the flip can be fluctuated. Alteration is accommodated restoring the geometry of the stacked flip to its unique emptied state before taking estimations. The supporting squares are not provided. There are numerous manners by which the powers can be resolved hypothetically. The direction sheet furnished with the contraption accepts the open door to present the utilization of speed graphs to take care of basically static issues by considering virtual movement. Nonetheless, different strategies can be utilized if wanted. This gear is a piece of a range intended to both show and tentatively affirm fundamental designing standards. Extraordinary care has been given to every thing in order to give wide test scope without unduly confusing or trading off the outline. Each bit of mechanical assembly is independent and minimized. Setting up time is insignificant, and all estimations are made with the least complex conceivable instrumentation, so the understudy contribution is simply with the designing standards being instructed. An entire direction manual is given portraying the mechanical assembly, its application, trial method and run of the mill test comes about..
Shoe Flex Tester - The Shoe Flex Tester is utilized for assurance of the capacity of the full shoe to withstand the impact of flexing stresses delivered on the diverse parts of the shoe. Despite the fact that the different parts like uppers and soles of a shoe are tried independently to flex perseverance with the assistance of flexometer and Ross flex analyzer, the shoe flex analyzer gives comes about, which are more identified with the genuine execution of the shoe in general. common lab supplies makers.
Highlights Low cost, viable instructing. Independent. Divider mounted. Brake lining contact material. Variable plate weight. 3 distances across of erosion plate. Assurance of coefficient of grinding. Three year guarantee. Scope of Experiments To decide the coefficient of grating of the plate material. To demonstrate that the base torque to keep up turn is relative to the hub load and width of the grinding plate. Depiction The divider mounted mechanical assembly involves a lower stationary plate with erosion circles and an aluminum compound plate whose pole pivots in metal rollers however which is in coordinate contact with the stationary plate. The base power on the grinding circle is the self weight of the upper plate, however 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 tradable grinding circles are provided of various distances across. This gear 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 trial scope without unduly entangling or trading off the plan. Each bit of device is independent and minimized. 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. A total guideline manual is given portraying the contraption, its application, exploratory system and run of the mill test comes about..
Retention In Wetted Wall Column The set up comprises of glass segment, nourish tank, CO2 barrel with controller, air controller with weight measure. Rotameter, getting plate and channeling. Metered amount of liquid is circulated alongside the dividers of segment from the best while metered gas and wind stream is gone through the bed vertically upwards. The gas air blend is invested in the fluid. All the stream rates can be freely changed to reenact diverse conditions and by estimating the centralization of gas consumed in the fluid the general volumetric mass exchange coefficients can be computed. Examinations Determination of general gas exchange coefficient Features Continuous task 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 hardware manufacturers,exporters and Mass Transfer Lab Apparatus Lab providers
Highlights Self-contained. Seat mounted. Provocative 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 rubbing between the gentle steel haggles bar of different materials. To confirm the condition of movement for the wavering bar. To ponder the meaning of an impact line for shear compel. To research the impact of the vertical position of the bar focus of gravity. Portrayal A variable speed electric engine drives two pivoting wheels on which an example bar sways with a solitary consonant movement because of the even weight that it applies on each wheel thus. The bar recurrence is reliant on 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 gear is a piece of a range intended to both exhibit and tentatively affirm essential designing standards. Incredible care has been given to every thing in order to give wide exploratory degree without unduly convoluting or trading off the plan. Each bit of mechanical assembly is independent and conservative. Setting up time is negligible, and all estimations are made with the least complex conceivable instrumentation, so the understudy contribution is simply with the building standards being educated. An entire direction manual is given depicting the mechanical assembly, its application, test method and normal test outcomes..
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