Photoelastic experiments with an overhead polariscope
All filters rotatable in any direction on the horizontal plane
Plane or circular polarised light possible
Green filter for monochromatic light
Polariser and analyser each comprising a polarisation filter and quarter wave filter
Filter enclosed, with stress-free glazing
8 different polycarbonate (pc) models supplied
Load application device with force gauge for compressive and tensile loading
Storage system to house the components.
It is used both for quantitative measurements and for demonstrating complex stress states. Photoelasticity is a proven method of analysing and recording mechanical stresses and strains in components. The components used are models made of a transparent, photoelastically sensitive plastic, which becomes optically birefringent under mechanical load.
Features:
Generate stress patterns with linear or circular polarised light
Monochromatic or white light.
All filters with 360° angle scale and marking of the main optical axis
White light generated using a fluorescent tube and two incandescent lamps
Monochromatic light (colour yellow) generated using a sodium vapour lamp
Generation of compression or tension forces by means of a threaded spindle
Representation of mechanical distribution of stress in photoelastic experiments
2 plane polarisation filters as polariser and analyser
2 quarter wave filters to generate circular polarised light
Filters roller bearing mounted and rotating
Frame cross-arms height-adjustable
Complete models in polycarbonate (PC) for demonstration purposes available as accessories.
Using this unit photoelastic experiments and practices of transparent test specimens (models) may be performed.
Unit for photoelasticity practices, illustrating the subjects of the Photoelasticity theory, the Elasticity theory, Strength of Materials, and Structure theory.
The different test specimens are subjected to loading by external forces and have poralised light shone through them.
A load application element can apply tensile, bending, compressive, and distributed and punctual loads to the specimen.
It is very suitable for the introduction and study of photoelasticity: optical elements, isochromatic, isoclinic, band order, band factor, edge tensionsing, etc.
The stresses and strains occurring in the test specimen are represented as bright spots or figures of different colours, and we can visualise the distribution of stress.
It is very suitable for the introduction and study of photoelasticity: optical elements, isochromatic, isoclinic, band order, band factor, edge tensionsing, and for strain and stress analysis and measurement with strain gauges.
Unit for photoelasticity practices, illustrating the subjects of the Photoelasticity theory, the Elasticity theory, Strength of Materials, and Structure theory.
Using this unit photoelastic experiments and practices of transparent test specimens (models) may be performed.
With the aid of the system it is possible to analyze and process the captured data during test experiments, making measurements with strain gauges.
These specimens show a full color and high contrast results and are also made of a special very hard material that avoids breaking during daily use.
Photoelectric Effect
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Photoelectric Effect
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It is used to demonstrate instantaneity of photocurrent and saturation value of photocurrent, and that the strength of photocurrent is proportional to the intensity of incident light in unit time in secondary schools, colleges and middle school physics.
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Multi-wavelength photometric measurement at chemical reaction end-point (667 nm - maxi absorbance point, and 840 nm - turbidity compensation).
Provides direct reading from inserted micro-cuvette.
Automated point-of-care device for measuring glucose in capillary whole blood.
Technology: optical absorption and reflectance photometry.
Sample size: 5 to 10uL capillary, venous or arterial whole blood.
Sample collected directly from skin surface into single-use microcuvette by capillary action.
Uses dedicated microcuvette (closed system).
Removable microcuvette holder to allow for easy cleaning.
Correlation with reference laboratory measurements: 0.99
Factory calibrated and continuous built-in auto self-test (when switched on). Needs no further calibration.
Measuring range: 0 to 500 mg/dL.
Read-out in: mg/dL or mmol/L.
Reading time: 40 sec. to 4 min.
Interfaces: RS 232 to printer or computer.
Power supply: 220V /50 or 4 x type AA / R6 1.5 V batteries (allowing for 100h to 150h continued usage).
Display informs: glucose reading, reading errors, systems errors, battery status.
Symbols in display facilitate multi-lingual understanding.
Built-in memory, storing > 400 measurements.
Supplier’s product reference: HemoCue Glucose 201+ analyzer starter set/kit.
Sample size: 5 to 10uL capillary, venous or arterial whole blood.
Sample collected directly from skin surface into single-use micro-cuvette by capillary action.
Uses dedicated micro-cuvette (closed system).
Measuring range: 0 to 26 g/dL.
Read-out in: g/dL or mmol/L
Reading time: <20 sec.
Display informs: haemoglobin reading, reading errors, systems errors, battery status.
Automated point-of-care device for measuring haemoglobin in capillary whole blood
Technology: Dual wave length optical absorption photometry (506 nm and 880 nm for Hb measurement and turbidity compensation).
Both wave lengths are at isobestic points for oxyhaemoglobin and deoxyhaemoglobin
Calibrated and built-in auto self test each time the device is switched on. Needs no further calibration.
Provides direct reading from inserted micro-cuvette.
Removable micro-cuvette holder to allow for easy cleaning
Accuracy: Correlation with the ICSH (International Committee for Standardisation in Haematology) reference method: 0.99
Symbols in display facilitate multi-lingual understanding
Interfaces: RS 232 to printer or computer.
Power supply: 220V /50 or 4 x type AA / R6 1.5 V batteries (allowing for 100h to 150h continued usage).
A tool to measure the intensity and frequency spectrum of light sources used for the treatment of hyperbilirubinemia. Irradiance meter to measure the output of blue light phototherapy units for treatment of jaundice.
Suitable for conventional CFL (fluorescent), halogen blue light sources.
Suitable for fibreoptic, and LED light sources.
Designed for frequent disinfection with hospital-grade products.
Portable, handheld model.
Results are available within 5 seconds after commencement of the measurement.
Two models available, one model requires 2 x AAA alkaline batteries, another model has a built-in rechargeable lithium-ion battery.
The sensitivity is equal to or better than: 0.1 µW/cm²/nm.
Automatic zero adjustment at instrument switch-on.
Full batteries allow for 8 hours continues operation for the rechargeable version and 120 hours for the version with 2 x AAA alkaline batteries.
The spectral range for blue light is equal to or better than: 400 – 500 nm.
The spectral irradiance (in wavelength) range is equal to or better than: 0.1 – 150 µW/cm²/nm.
The unit has the following minimal features:
A self-check function.
LCD display clearly visualizing measurement results and other information.
Out of measurement range indicator.
Alarms for detector and/or system failure.
Low battery indicator.
An auto switch-off feature.
The Personal Computer constantly keeps under control the simulation in progress and displays its behavior through analog and digital signals and meters; in this way the student, through measurements and tests, can go on with the troubleshooting. It is possible to simulate the behaviour of components and systems, on the basis of the operating conditions which can be monitored directly on the panel or through Personal Computer by teacher and students.
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The photovoltaic DC current from is fed to the input of via a connectioncable. Inside the DC current passes safety devices and enters theinverter. The inverter transforms the DC into AC current. The unit contains thesecomponents and is conceptualized as an extension for the trainer. The inverter alsooptimizes voltage and current to ensure that the photovoltaivc modules producemaximum possible power. Feeding electricity from photovoltaic solar modules into the mains grid requires severalspecial system components. These components enable conversion and capture ofthe solar electricity and ensure system safety. Theamount of fed in electricity is captured by a modern two way electricity meterand the own consumtion is captured by an energy logger. The inverter output provides an AC voltage withappropriate level and frequency to enable feeding into the mains grid.
Features:
Modern twowayenergy meter for capture of energy transferred to and from the mains grid.
Inverter providing grid control and maximum power point tracking.
Dimmablehalogen lamp for experiments under varying electrical load.
Unit withpractical components for grid connected usage of solar electricity.
90W, 12V, complete with a cell for measuring the solar radiation and with a panel temperature sensor.
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The photovoltaic panels study unit is composed of basic panel mounted on a stand which allows any type of orientation, a movable electric equipment complete of voltmeter and ammeter, and a light source.
Characteristics of Photovoltaic Panels Study Unit
The artificial radiation is possible because there is a light source constituted by lamp with brightness continuous change gear (0·300 W) mounted on an adjustable tripod. The electric instruments allow the photovoltaic panel performances control in the different conditions of solar and artificial radiation. The panel is constituted by 36 single-crystalline silicon cells, connected in series, and It presents the following characteristics with an ambience temperature of +25C:
Amps max: 600 mA
Open-circuit voltage: 22 V
Peak Watts: 10 W
Peak power voltage: 17 V.
The photovoltaic panels study unit is composed of basic panel mounted on a stand which allows any type of orientation, a movable electric equipment complete of voltmeter and ammeter, and a light source.
Characteristics:
The artificial radiation is possible because there is a light source constituted by lamp with brightness continuous change gear (0·300 W) mounted on an adjustable tripod. The electric instruments allow the photovoltaic panel performances control in the different conditions of solar and artificial radiation. The panel is constituted by 36 single-crystalline silicon cells, connected in series, and It presents the following characteristics with an ambience temperature of +25C:
Peak power voltage: 17 V
Amps max: 600 mA
Peak Watts: 10 W
Open-circuit voltage: 22 V
Required Services:
Electrical supply 220 V
Weights and dimensions:
Dimensions: 660x450x200 h mm.
Unit weight: 16 kg.
Complete with connecting cables and experiment manual. Photovoltaic Solar Energy Trainer is mounted on a mobile structure that allows it to be moved to the venue for practical sessions and allowing the photovoltaic panel to receive solar radiation.
Training Objectives:
The photovoltaic panel, which can be inclined through a range of 0 to 90, and the calibrated cell used to measure solar irradiation, are on one side, and all of the components of a basic photovoltaic facility used to provide 12 V of direct current and 230 V of alternating current are on the other side.
Identification of all components of the trainer and how they are associated with its operation
Measurement of the voltage and power parameters of the photovoltaic panel
Programming the load regulator
Analysis of the installation of the trainer
Measurement of solar irradiation
Alternating current supply
Direct current supply.
Photovoltaic Trainer system may be expanded by the addition of extra optional solar panels and batteries. Instrumentation includes high accuracy solarimeter, panel temperature, electrical charging and load power measurement.
A complete 80W solar panel system with instrumentation panel containing a battery charge controller, panel loading system, all relevant instrumentation and an external deep cycle 110Amp hour battery.
Physical Balance 1000 g
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