Four flowmeters are described below which operate on the principle of either head loss, impulse or velocity. A fifth flowmeter, Rotameter working on the variable area principle, is described separately in the Hydraulics Bench leaflet. The measurement of flow rate is a fundamental topic to which a considerable degree of attention has been paid with the result that there are flow meters available using a wide variety of principles. Chosen five types of flowmeter, which are all in common industrial use, to provide experiments in comparative flow measurement.
Experimental Capabilities:
Establishment of the relationship that flow is proportiona to the square root of the pressure drop between entry and the venturi throat.
Observation of degree of pressure recovery at the end of the divergent section of the Venturi Tube.
Demonstration of use of Venturi Tube as a water flow meter and determination of the flow coefficient.
It can be fed from our Hydraulic Bench or from the mains and it allows, by making use of different weirs, to carry out experiments on the open channels. The Flow Visualization Mini Channel unit, made of transparent plexiglas, allows to study the behaviour of a water flow in a channel of small dimensions. An ink jet device allows to visualize the water flow around the models.
....
Boundary layer studies involve the determination of the thickness of this layer and the velocity profile within it. These parameters will vary with velocity of the fluid flowing over the surface, the distance from the leading edge of the surface and the degree of roughness of the surface. When a fluid flows adjacent to a stationary surface, e.g. down a tube, the fluid immediately in contact with the stationary surface will have zero velocity. The resulting shear forces in this area will be significant and lead to high values of drag forces between the flowing and stationary surface. As a result there will be a comparatively steep velocity gradient associated with the adjacent boundary layer of the fluid. Boundary Layer Experiment accommodates these studies.
Experimental Capability:
Boundary layer growth on smooth and rough surfaces
To determine the velocity profile of the boundary layer at different distances from the sharp leading edge of a smooth test plate
To determine the velocity profile of the boundary layer at specified distances from the blunt leading edge of a smooth test plate
Experiments:
Simultaneous control of speed and tension
Independent control of speed and tension
The flexible design of the equipment allows the user to develop many other analysis and control exercises to suit their needs. It is good for extended or advanced control experiments, and is ideal for student project work.
Practical methods of controlling multi-variable electro- mechanical systems.
The applied force is captured on the digital display along with the revolution count of the specimen. Both values can be reset and zeroed (tared) prior to the testing commencing. When failure occurs, a microswitch stops the motor and the cycles to failure are registered on the digital display. A 2800rpm motor rotates a specimen through a gear and pulley arrangement between 5600 or 1425 rpm. The specimens are held within chucks and loaded using a cantilever arrangement, with the load being applied through a screw jack mechanism with integral cantilever load cell. This Rotating Fatigue Machine Digital Apparatus has been designed to introduce students to the effects of material fatigue using a sinusoidal variation of bending stress. The count remains when the motor is not running and the ability to reset the counter has been designed in. Through an appropriate spreadsheet software printing and manipulation of data can be completed.Specially machined necked test specimens are provided in steel. A safety guard shields all rotating parts. The digital display incorporates a usb socket, which allows a host computer to be connected to the. The software supplied with the allows the capture and reviewing of data. These have a 4mm nominal neck diameter and are held in the unit using collect chucks. All tooling is provided to allow the removal and fitting of these specimens.
Experimental Capabilities:
Introducing students to s-n curvesMaterial specification on fatigue limits
Specimen geometry on fatigue limit
To make an introductory study of fatigue using a wohler rotating fatigue apparatus, including the time to failure caused by various stress levels and materials
The accessory affords bending fatigue of a cantilevered strip of metal or plastic in modes varying from alternating to fluctuating stresses
Intended use:
Intended for molecular medical laboratory, PCR work. Micropipette tips for use with standard Micropipettes used for pipetting small amounts of liquid in the laboratory.
Made of rigid plastic.
Capacity up to 4.7 L.
Clear lid to view fill level.
Leak proof, puncture resistant.
Built-in needle removal port.
Upright and stable during use.
Properly labelled with a biohazard label.
Able to close with a tight-fitting, puncture-resistant lid without sharps being able to come out.
Leak-proof, puncture-resistant plastic container for disposing potentially infectious sharps.
Volume category: <150L
Gross volume-Freezer: 86L
Equipment operating voltage and frequency: 220-240 Volt, and frequency 50Hz/60Hz, 1ph.
Refrigerant: R600a, 50 grams
Energy consumption, stable running (kWh/24 hours): 0.95
Operating temperature: Max rated ambient temperature: +43°C
PQS Prequalified Mains Powered Vaccine/Water-Pack Freezer for storage of vaccines at -15?C to -25?C and freezing of water packs.
An integrated kit linking SDD refrigerators to a solar generator, which uses excess electricity from solar panels to power lighting, mobile phones, ventilation and other applications.
1 x mobile ceiling fan,
2 x USB outputs (5W each),
1 x 12V/20W socket outlet,
3 x keys for the locker,
1 x rechargeable 27Ah battery with a life cycle of 5 years,
2 x rechargeable LED lights with 3 settings and an autonomy of 35 hours.
The single-use, User-programmable Temperature Data Logger (UTDL) with a Bluetooth interface for data download, analysis and programming of device settings via a Bluetooth-enabled smartphone.
Device settings, such as alarm thresholds, logging interval etc., can be programmed by the user via the free mobile application using a smartphone or factory programmed. The device is supplied unprogrammed by default and if factory-programmed settings is required, device settings need to be specified upon ordering.
The device shows any temperature alarms that have occurred via LED indicators.
When connected to a smartphone via the Bluetooth interface, the device generates a report via the free mobile application. Data is then uploaded and archived via the smartphone’s internet connection to the web application (accessible on the internet web browser of a PC or Mac). Reports and data can be exported from the web application in PDF or CSV file formats.
Glue, water-based, such as PVA (Poly Vinyl Acetate)
Bottle is labeled with product information (i.e. ingredients), age suitability, directions for use, safety instructions.
For classroom use with paper or cardboard.
No organic solvents, non-toxic, non-flammable, washable.
It has a handle containing batteries to power its light (a small built-in light bulb or fibreoptic light) for airway illumination, and a curved or straight blade of various designs and lengths that can be hinged/interchanged or integral. A hand-held device intended to be used by medical professionals to manipulate the tongue, preventing it from obstructing the oropharynx and enabling a clear view of the trachea for the insertion of an endotracheal (ET) tube prior to the delivery of inhalation anaesthesia and/or ventilation.
Laryngoscope set for neonates, including pre-terms. To manipulate the tongue and enable a clear view of the trachea for surgical/mechanical ventilation/intubation procedures.
The oxygen flow splitter is a device intended to distribute medical oxygen from a source to multiple independent outlets. It can be connected to any low-pressure oxygen source, including concentrators, cylinders and a centralized system, and is suitable for tabletop or wall mounting.
Suitable for cleaning and disinfection with hospital-grade cleaning products.
Inlet port is DISS format.
6 mm barbed outlets.
Flow meter columns are transparent, clearly readable and graduated (metric system).
Equipped with five independent, Thorpe tube flow meters, to measure and regulate the flow of medical gas.
Inlet pressure up to at least 20 psi (138 kPa).
0-2 L/min, accuracy better than 10%, graduation 0.125 L/min or lower.
For gripping soft and delicate tissues (lungs and intestines).
Material: Martensitic steel (quenched, magnetic steel)
Martensitic steel composition: 0.15-0.20% carbon; 12-13% chromium.
Pressure force instrument: grasping forceps, springy.
Atraumatic ridged grippers, each with aperture (oval).
Soft ratchet, lockable.
Length: 16 cm.
Reusable.
Urethral catheter with balloon: Foley catheter 2-way with nelaton tip.
Side channel for inflating balloon, ending by a non-return valve with Luer tip connector.
Central channel for urinary drainage, straight rounded distal end with lateral eyes, proximal end with cup connector allowing catheter to be connected to urine bag.
Balloon capacity expressed in ml.
Length expressed in cm.
Colour code / external diameter visible on connector.
Mechanical infant clinical scale, beam type, with tray, for use up to 16kg with 10g precision, with splash cover. Used for weighing infants in the context of growth monitoring.
Beam type mechanical scale for infants
Display: easily readable in low light working situations, signal white coloured numbers on black surface.
With easy zero adjustment possibility.
With stabilizing mechanism for faster reading of results.
Measuring range: 0-16kg
Minimum graduation: 5g
Readout in metric (kg)
Removable curved tray.
Reading time in seconds: about 30 seconds
Built in round level bubble with indication of centre.
Adjustable feet allow for horizontal levelling.
Wheelchair, manual, active rough terrain, rigid frame:
POSTURAL SUPPORT: For CHILD users who can sit upright and balanced without additional support, as well as those needing additional support such as adjustment of wheelchair configuration and/or addition of postural support devices. Users who do not need high back support AND/OR arm supports.
FUNCTION AND ENVIRONMENT: For people who self-propel. Rim-propelled. For use in rough terrain in rural outdoor settings.
Relationship of seat, back-, arm- and foot support dimensions anatomically appropriate for size of wheelchair.
SUPPLIED WITHOUT CUSHION.
Self-priming centrifugal pumping set, capacity 30 Cubic Metres per hour at around 2900 RPM, at 20 metre TMH (Total Manometric Head) for 1-m suction head.
Maximum suction lift 5 metres.
Centrifugal pump, diesel driven, with a capacity of 30 m3/hr at 20 m Total Manometric Head.
These are drop forged and made of high quality chrome vanadium steel.
These spanners are widely used for its durability and quality.
Chrome Vanadium Steel, Full Polished or Satin Finish.
It is used for teachers in demonstration experiment of middle school physical hygiene teaching course, also used for student extracurricular activity groups.
....
