Ideal for protecting visitors in industrial or medical settings.
Scratch-resistant, Anti-fog, Anti-static.
Clear lens absorbs >99.9% of harmful UV light
Fit over prescription eyeglasses
Economical safety spectacles
100% impact-resistant polycarbonate wraparound unilens design with blue temples.
Solar Training Set Sun Tracking Electronic Engineering Lab
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Photoelectric Effect
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The programme of exercises enables familiarisation with six different drive implementation and analysis methods: understanding the brief and the drawing, assembly, setting, adjusting, testing, and making calculations. This laboratory system is used to introduce combined drives and their correct assembly. The flexibility of the set-up and the modularity of the components simplifies experimentation and implementation of the students' own ideas. All the system components are kept ready to hand and well protected in a housing system. A robust tubular steel frame with a square profile and bearing elements provide the accuracy for the setting of precise gearing.
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Experimentation:
To determine the effective thermal conductivity of the composite cylinder.
To compare the theoretical temperature profile within the composite cylinders, with that of observed profile.
To estimate the actual rate of heat transfer through the composite cylinders from the measured interface temperature of the two insulating materials with known thermal conductivities.
The unit consists of a pump, a storage tank and a water proof panel on which all friction loss components are arranged. The loss is measured by differential pressure using manometers. Pressure tapping is by valves with quick connection. Piping Loss Test Set Small is a self contained unit for studying the friction loss in pipes, pipe fittings and valves at various flow rates. The unit is on a steel frame on wheels. All pressure taps are connected by flexible hoses to a set of specially arranged manifolds such that differential pressure across any component can be measured simply by opening valves without removing the hoses.
Experiments:
Friction losses in pipe fittings, valves, sudden expansion and contraction at various flow rates.
Friction losses in straight pipes at various flow rates.
The is available in two basic configurations. The standard is the simplest system. As standard the filtration assembly works with polymer membrane filters (90mm diameter) and sample filters are included for microfiltration (MF), ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO). A backpressure valve is used to adjust the transmembrane pressure with a maximum allowable system pressure of 40 bar (analogue pressure indicator). A wider range of filters are available on request. It uses a high pressure stainless steel piston pump to circulate product from a food vessel to the filtration assembly with simple on/off control.
The 50 is an enhanced unit, with all the additional benefits of computer control, data logging and diafiltration capability. There is also an electronic mass balance to measure the mass of permeate collected. This option also enables diafiltration using a peristaltic pump and high level sensor. It includes an electronic pressure sensor to measure filtration pressure (0-40 bar) and electronic temperature sensor (thermocouple) to measure retentate temperature. It also includes a feed pump speed controller, which enables the retentate cross flow velocity over the filtration membrane to be varied. The data from all these is logged in the software enabling plotting of permeate flow rate with time so that the effect of variables (filtration pressure, cross flow velocity, product temperature and diafiltration) on process performance can be determined. The software can be used to define the mass of permeate collected prior to addition of water/buffer (batch diafiltration). Communication to the PC (not supplied) is via an internal USB interface.
Features:
Suitable for microfiltration, ultrafiltration, nanofiltration and reverse osmosis membranes and pressures. Pressure operating range of 1-40 bar.
Uses a standard filtration size of 90mm enabling a wide range of filtration membranes to be used
Optional ceramic membrane available
Supplied with a range of polymer membranes.
The fault switches are hidden beneath a panel on the door of the control cubicle so they are not visible whilst the particular fault is being diagnosed. This allows the unit to be demonstrated in the classroom, which in the real world may not be possible. The cubicle is fitted with examples of the typical devices one may come across in the field, such as high and low pressure switches and a thermostat. The allows the lecturer to introduce 12 faults into a control circuit, which has been wired by the student. The Unit has a mimic diagram on the front panel, which simulates an actual compressor control circuit.
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The following can be seen:
Gear wheels
Synchronization
Mechatronics
Pressure reservoir
Oil cooler and differential
Duplex clutch
Parking lock
The gear box is mounted on a assembly stand and can beturned around its own axis.
Designed with the latest technology, an innovative PC-likeTouch Screen system, employed to control and manage all sorts of automatic testing machines. Multi piston electric pump with variable flow driven by a microprocessor. To update or complete your compression and flexural testing machine on concrete and mortar.
Eight channels controlled unit for a fully automatic execution of the test.
Data acquisition system.
The machine comprises.
Features:
Specially designed shaper machine for increased-production, precision Performance and Deep cut.
Selected special alloy steel used for screws and other steel parts.
Naturally Seasoned Casting.
Quick Return Motion.
Heavily cross ribbed, Robust and sturdy construction ensure free working.
Fully Hand Scrapped.
The ideal Operational Amplifier
The negative feedback
Not inverting configuration
Inverting configuration
Integrator
Differentiator
Study of ceramic filters
Study of active filters
Filters and parameters
Filters transfer functions
Filters in cascade
Attenuation characteristics of the active low-pass, high-pass, stop-band and band-pass filters
Study of passive and active notch filters
Study of switching filters
Fault simulation.
This Double Push Button module has four switch buttons that, horizontally aligned, or as single buttons for sending values, may be used as a pair of buttons (e.g. for defined switching/dimming, or control of shutters and blinds), single button switching/dimming or single button control of blinds.
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Gears are distributed on different shafts (input shaft, right output shaft and left output shaft), which are mounted on ball bearings that will allow low inertia and a decrease of the losses due to friction. They are made of aluminum and their radius is 40mm. Both the input shaft and the output shafts have pulleys equipped with protractors with the aim of enabling the student to determine and verify the torque and speed ratios.
The is mounted on a frame consisting of aluminum profiles with panel made of painted steel, with legs that enable to locate it on an appropriate surface.
On the other hand, it also includes brackets that allow to hang the unit on a wall.
Frame Bench And Floor mounted
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PCR reaction tube to be used on most standard Thermocyclers, RT PCR platforms, DNA Sequencers.
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Hand held, battery powered device that measures the oxygen concentration in a flow of gas from a medical gas source or, with adapters, through a medical gas-flow device such as a ventilator or anaesthesia system. The intended application is checking gas supply equipment performance.
Operational Characteristics:
Suitable for measuring gas supply with pressure up to 50 psi (344 kPa)
Response time < 20 s.
Warm-up time < 1 s.
Flow rate measurement: up to 10 LPM
Flow rate accuracy within ± 0.2 LPM
Flow rate resolution 0.1 LPM
Display visualizing O2 concentration, flow rate, system messages and battery status.
Ultrasonic oxygen sensing technology, with permanent sensing chamber.
O2 measurement to include the range 21 - 96%.
O2 accuracy: within ± 1.5% of full scale.
O2 resolution: 0.1%.
Material: Austenitic steel (non-quenched, non-magnetic steel).
To spread and open the posterior wall of the vagina to visualize the uterine cervix.
Static function instrument: vaginal speculum.
With weight which fits on the shank of the blade.
Austenitic steel composition: 18 to 20% chromium, 8 to 10% nickel.
Blade width: approx. 38 mm.
Blade length: approx. 80 mm blade.
Total length: approx. 24 cm.
Reusable.
Wavelength: 630nm, the illumination distance is greater than 50m, with spare battery.
One side can write and the other side is a miniature semiconductor laser emitter emitting red light.
The product is composed of 4 60ML reagent bottle and 1 30ML reagent bottle, 6 100MM glass Petri dishes, 1 100MM plastic petri dishes, 100 90MM filter, 3 250ML plastic beaker and a 100ML plastic beaker, a scissors a scale of 2, Straw, respectively 1ML and 10ML, 2 straight glass tube, an electronic thermometer, a 100ML plastic cylinder, a stirring rod and a mini magnifying glass, a stainless steel tweezers and a dissecting needle, and a 24 hole plastic petri dish.
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