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Established as a Partnership firm in the year 2020, we “Wee Scientifics” are a leading Manufacturer and Trader of a wide range of Refrigerated Centrifuge, Digital Water Bath, Magnetic Stirrer, etc.

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• Item Code: WEERTP
• Production Capacity: 50 PCS
• Delivery Time: 2-4 weeks
• Packaging Details: Wooden Box

Product Details:

Established as a Partnership firm in the year 2020, we “Wee Scientifics” are a leading Manufacturer and Trader of a wide range of Refrigerated Centrifuge, Digital Water Bath, Magnetic Stirrer, etc.

Product Details:

Established as a Partnership firm in the year 2020, we “Wee Scientifics” are a leading Manufacturer and Trader of a wide range of Refrigerated Centrifuge, Digital Water Bath, Magnetic Stirrer, etc.

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Interferometer is built by assembling the building blocks on a breadboard as per desired optical layout. Optics and laser head are held using kinematic mounts with two axis fine adjustment facility. Precision alignments for obtaining the interference fringes are done using kinematic mounts.

One of the simplest experiments using the interferometer is measurement of index of refraction of air with an airtight test cell placed in one of the optical arms of the interferometer. No other factor such as convective airflow, should be present, that can generate optical path differences. The flexibility in fringe localization is one of the important advantages of the mach zehnder interferometer over other interferometers. Although many Mach-Zehnder interferometers use a rectangular arrangement, parallelogram arrangements are also possible. Vibration isolated supports for optical table is optional.

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conductive carbon pastes can be used for a wide range of applications including; biomedical sensors, automotive, electrodes, aerospace, printed heaters, printed resistors, membrane touch switches, keyboards and thin-film photovoltaic including perovskite solar cells.
Nano and micron flake conductive silver pastes and inks that have been developed for a broad range of applications including; sensors, touch screens, antenna, RFID, printed heaters and photovoltaic cells such as CIGS, perovskite and silicon heterojunction solar cells

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• Delivery Time: 2 weeks

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Fizeau Interferometer is one of the simplest and most versatile interferometers and is popular for routine measurements of both flat and spherical surfaces. It is used to measure optical components such as flats, prisms, lenses, or precision metal parts such as bearings, sealing surfaces or polished ceramics. Measurements can be made by using the static fringe analysis software.

The Holmarc Fizeau interferometer (model no:HO-ED-INT-14) basically comes with high optical quality (λ / 20) reference flat. The reflection from the test surface interferes with the reflection from reference flat, producing fringes. The shape and quality of the fringes depends on surface quality of the test flat. The fringes are digitalized using a high resolution CCD camera. By analyzing the fringes, we can obtain the P-V flatness, RMS flatness, 3D surface plot etc. The instrument is built upright to fix the test sample easily. The tip / tilt test base allows the test sample to align with the reference surface. High quality aberration corrected optical design enhances performance.

Holmarc's Brewster's Angle Apparatus (Model No: HO-ED-P-01) is designed to study the Brewster’s angle phenomenon and the polarization of reflected light. The essential elements of the apparatus consists of a goniometer, a laser light source capable of projecting a light beam that is linearly polarized in its plane of incidence, and a pinhole photo detector with output measurement unit for detecting and measuring the intensity of light reflected. The diode laser and polarizer rotator are mounted on an optical rail.

Intensities of reflected light polarized in the plane of incidence and perpendicular to the plane are obtained as a function of angle of incidence. The results should be consistent with Fresnel's laws of reflection.

A beam of light incident on a di-electric transparent material can be resolved into parallel (P) and orthogonal (S) components. These components have different reflection coefficients and Brewster discovered that at a particular angle of incidence Ɵв (called Brewster angle), reflection co-efficient of P-component goes zero. At this angle, direction of reflected and transmitted beam are orthogonal to each other.

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Bridgman, Czochrlaski, flux growth, Top seeded solution growth , solution growth, Water bath , etc.,Wee can customize laboratory equipment (furnace, oven, fume hood, glove box, etc.) as per clients' requirements

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• Production Capacity: 50

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Wee Scientifics - Offering Quartz Sealing set up with Vacuum pump.Our range of vacuum pumps and systems enable us to provide comprehensive solutions to increase the productivity and efficiency of our client's process.

Product Details:

Established as a Partnership firm in the year 2020, we “Wee Scientifics” are a leading Manufacturer and Trader of a wide range of Refrigerated Centrifuge, Digital Water Bath, Magnetic Stirrer, etc.

Additional Information:

• Item Code: WEEPuller
• Production Capacity: 50 PCS
• Delivery Time: 4-12 weeks
• Packaging Details: Wooden Pack

Reliable measurement techniques for optical characterization of thin film is a must for any laboratory. HOLMARC’s Theta 2 Theta Spectrophotometer is a useful tool for characterizing absorption, transmission, and reflectivity of a variety of materials such as pigments, coatings, windows, and filters. Automated Theta 2 Theta goniometer tool is used for measuring absolute reflectance and transmittance of samples at different angles for characterization of the optical or electronic properties of materials. Reflectance measurements can identify the color of a sample or examine differences between objects for sorting or quality control.

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Spectrometer Goniometer (Model No: HO-SP-RE-01) is designed as a versatile instrument suitable for any optics laboratory. Its optical rail based construction allows the user to device it for multitudes of applications. Laser engraved, precise rotary graduations ensure reliable and repeatable read outs. Its sturdy movement along with its fine positioning capabilities makes the instrument suitable for many research activities other than spectroscopy.

This device is specifically designed for studying reflection gratings. It consists of a laser head mounted on a kinematic holder and a grating mount with angular adjustments. The grating can be fixed at appropriate angles using this mount. Fine adjustments in grazing or incident angle can be done using kinematic tuning of the laser mount.

Both the laser and grating mounts are fixed on rail carriers, which are held on a graduated solid aluminum rail. The diffraction pattern is projected on a screen or wall. When a meter scale is used as reflection grating, the pattern can be observed typically at two to three meters.

 

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Experiment

    To measure the wavelength of laser light using a millimeter scale as grating
   To find the groove spacing of CD

Holmarc's Faraday Effect Apparatus (Model No: HO-ED-P-04) is designed for the determination of the Verdet constant of a material for a given wavelength of light. With its new and integrated design, this device is easier to setup and operate so that students can understand the principles and theories behind the experiment. Red and green diode lasers (λ = 650nm, 532 nm, respectively) are used for this experiment. This apparatus provides a rod of Schott N-SF57 glass as a sample. A photo detector is placed at the end of the optical rail to measure the intensity as a function of the analyzer angle θ for a full rotation. This system also consists of a power supply for the laser, a magnetic solenoid and a power supply for the solenoid.

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Holmarc introduces yet another product ‘Hydrogen Spectra-Balmer Series Appartus’ for the benefit of students in spectroscopy. It is specially designed for the determination of wavelengths of Balmer series from hydrogen emission spectra and to find the Rydberg constant. This apparatus comprises of high performance CCD Spectrometer, Mercury lamp with power supply and Hydrogen Spectrum Discharge Tube coupled with a High Voltage Transformer. Spectrometer utilizes Constant Deviation Pellin Broca Prism for spectral dispersion and is compatible with USB 2.0 interface. The better sensitivity of the CCD makes this spectrometer suitable for applications with lower light signals as well. The software developed for this instrument has facilities for capturing single or continuous spectra, custom wavelength calibration, dark subtraction and intensity comparison, simultaneous display of overlay multiple spectra, exporting data to Microsoft excel, automatically timed spectrum saving etc.

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The apparatus uses CCD imaging instead of photographic silver halide films. It has become difficult to carry out silver halide film based spectroscopic experiments in class rooms due to the unavailability of consumables and hurdles in its processing. CCD imaging of the spectrum is a timely solution. Data acquisition is easy and fast. As most of the commercial spectroscopes are based on digital imaging, students get an exposure to the latest trends in spectroscopy.

Holmarc's Contact Angle Meter (Model No: HO-ED-M-01) is a compact and cost effective CMOS based instrument for measuring contact angles of liquids over solid substrates. It has manual dispensing unit with camera interface for measuring contact angle of liquids on solid surfaces. The surface over which contact angle is to be measured is held in horizontal position to find out contact angle using sessile drop method.White light LED with variable intensity control ensures extreme low heat radiation.

2.    Precise travel adjustment provided for CMOS with Optics assembly to fine focus the image.

3.    Manual dispensing.

4.    50, 100 & 250 micro liter sample syringes provided with the system.

5.    Precision height adjustment provided at the test base.

6.    Vibration inhibiting solid construction for sharp drop images.

7.    Powerful and user friendly windows software provided for image analysis.

8.    Live images can be viewed on the PC monitor showing the droplet on the solid surface reassures the operator-regarding validity of the contact angle measurement.

9.    Video processing enabled software.

10.    Captured image and its Angle measurement table can be saved for future reference.

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Computer interfaced Fabry-Perot interferometer (Model No:HO-ED-INT-10A) is similar to projection type (model no:HO-ED-INT-10), apart from the fact that in this case, the interference pattern is captured by a CCD sensor and displayed on a computer monitor. The advantage of computer interface is that the pattern can be saved for future analysis. In addition, measurements can be taken directly from the monitor by using the software module provided.

In the etalon, distance between partially reflecting mirrors can be precisely varied in microns. One of the beam splitters can be kinematically adjusted for initial settings

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Michelson interferometer is a widely used instrument for measuring wavelength of light, refractive index of transparent materials etc. The interferometer (Model No. HO-ED-INT-06) is designed and constructed in modular fashion. The beam splitter is designed to reflect 50% of the incident light and transmit the other 50%. The incident beam therefore is split into two beams; one beam is reflected towards mirror M1, the other is transmitted towards mirror M2. Half the light is transmitted through the beam splitter to M1 and the other half is reflected by beam splitter to M2. The reflected beams from M1 and M2 superimpose at the beam splitter and the interference pattern can be observed on the screen.

Holmarc's Young's modulus apparatus (Model No: HO-ED-M-02) is used to measure the Young's modulus of a bar. Young's modulus is a measure of stiffness of an elastic material and is a quantity used to characterize materials. It can vary considerably depending on the exact composition of the material. If the beam is loaded at its mid-point, the depression produced will not form an arc of a circle. This type of bending is called non-uniform bending. If the beam is loaded at both ends, the elevation produced will form an arc of a circle. This type of bending is called uniform bending. Two methods are used to measure Young's modulus of the bar in both uniform and non-uniform bending. They are Pin and Microscope method and Optic lever method.

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A refractometer device used for the measuring the refractive index of samples using the concepts of critical angle and total internal reflection. Holmarc's Refractometer (Model No: HO-ED-O-03) is an experimental model designed for understanding the basics of refractometry.

 

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Experiment

    To find the refractive index of an unknown solution.

• Features
• Drawings

    Refractive index measurement is easy
    Compact and precision design
    High performance LED light source of optical wavelength 589nm
    Precise optics minimize aberrations
   Can observe clear and sharp shadow line
   Mounts and rail with black anodized finish

 

The Z-Scan technique is a simple and popular experimental technique used to measure intensity dependent nonlinear susceptibilities of materials. Holmarc's Z-Scan System is a simple implementation of the z-scan technique that can be used to characterize optical materials.

In this method, the sample is translated along the axis of a focused Gaussian beam, and the far field intensity is measured as a function of the sample position. Analysis of the intensity versus sample position, Z-Scan curve, predicated on a local response, gives the real and imaginary parts of the third order susceptibility. In this technique, the optical effects can be measured by translating a sample in and out of the focal region of an incident laser beam

Holmarc's Photo Electric Apparatus (Model No: HO-ED-EM-02) is an instrument for studying the Photo Electric Effect and to obtain the Planck's constant.

A halogen source provides light energy to the photo tube. A filter wheel is placed in between the light source and photo tube to select different wavelengths. The filter wheel includes five narrow band interference filters to get the precise wavelength. A vacuum photo tube is kept inside the tube housing. This tube has very low anode dark current to achieve better results. The microprocessor controlled electronic interface gives the current and voltage readouts. The regulated power supply has 0 - 2V variable voltage to provide the stopping potential for electrodes. The ammeter gives accurate current output measurement facility. Toggle switch is provided to change the current range. The lamp house, filter wheel and photo tube housing are placed on an optical rail.Photo electric effect is the liberation of electrons from the surface of a material by absorption of energy from incident light. For each metal, there exists a minimum binding energy for electron, which is a characteristic of the element, called the work function. When a photon strikes a bound electron, it transfers its energy to the electron. If this energy is less than the metal's work function, the photon is remitted and no electrons are liberated. If this energy is greater than an electron's binding energy, the electron escapes from the metal with a kinetic energy equal to the difference between the photon's original energy and the electron's binding energy.

The stopping potential is measured by varying the anode voltage until the current drops to zero. The slope of a plot of stopping potential versus frequency is the value of the ratio, h/e. Hence the value of Planck's constant (h) and work function of the material can be determined. This instrument also imparts students, fundamental understanding of the quantum nature of light.

Holmarc's Millikan oil drop apparatus (Model No: HO-ED-EM-01) is modernized version of classic set-up used to find out electron charge. The apparatus makes use of CCD camera along with computer screen for convenient viewing of oil droplet. Measurements of the droplets are also taken from display screen using a software module. Control of high voltage power supply across the electrode is made easy by having a digital display on the front panel.

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Humidity Test chamber Environmental Test Chambers Temperature controlled test chamber

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Confocal Raman spectroscopy is a powerful analytical technique that combines Raman spectroscopy with confocal microscopy. It allows spatially resolved chemical analysis of samples by providing high-resolution Raman spectra from specific locations within a sample. A focused laser beam is used to illuminate the sample using the microscope, and the Raman-scattered light is collected through the same objective lens and coupled to the spectrometer.

Holmarc CRM 216C is a fully automatic inverted infinity confocal microscope integrated with a high-resolution spectrometer and laser excitation system. The new ergonomic design helps the user capture the microscopic image and Raman spectrum easily. The color-corrected infinity design microscope has a motorized turret, filter wheel, switching mirror, sample stage, and focusing features. The turret comes with six slots for holding six different magnification microscope objectives. It is also equipped with an 8-slot automatic filter wheel for dielectric beamsplitters and a notch/edge filter combination for Raman and photoluminescence applications with different wavelength lasers. The viewing head is a stereo binocular head with a 5.0 MP CMOS camera, which gives clear, sharp, high-resolution images of the sample. The coaxial illumination and bottom LED illumination can be controlled by software. The hand-held controller provided with the system makes easy adjustments of the sample stage and LED control by using the joystick key.

In this apparatus, both single mode and multi-mode fibers are used for the experiments. The apparatus makes use of rail and carriage system for mounting and adjusting the optical components required for experiments. Diode laser is used as light source. Laser fiber coupler is used to couple light from laser to fiber input end efficiently. There are mounts to hold input and output ends of the fiber firmly. Detector is placed on an XYZ stage. Distance between each component can be adjusted using the rail and carriage mechanism

Photoluminescence is one of the best scientific inventions ever in the field of material Science. The luminous efficiency of each fluorescent material differentiates them. And this experiment provides you the ratio of emitted photons to absorbed photons which is called the quantum yield of the material.

Our HO-SP-SQR300FA is our spectra monochromator with PMT detector which can be used as a PL system, which makes use of photoluminescence to measure the quantum yield of a material quickly and accurately. Our system consists of an excitation source, a monochromator and a photomultiplier tube as the spectrometer detector. It has a Czerny-turner optical path configuration; a plane holographic grating is used to diffract the input light. Use of holographic grating minimize the stray light for high sensitivity and accuracy. A stepper motor-controlled sine drive positions the grating, which is mounted on a precision rotary table. The sine drive delivers a linear relationship between stepper motor motion and wave- length of interest. Also, it includes a mechanism to change the wavelength selected by software and to record the resulting changes as a function of wavelength.

Holmarc has introduced new experiments for solar physics. It is a branch of astrophysics that specializes in exploiting and explaining the detailed measurements that are possible only for our closest star.

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Lamp Houses for Spectral Study

Xenon Arc lamps are excellent sources of continuous light. The bright emission from short arc between the anode and cathode makes these lamps high intensity point sources, capable of being collimated with the proper lens configuration or re imaged onto a fiber bundle.

In both models xenon arc lamp housing utilizes heat conductive forced air cooling technique, to make sure efficient cooling of the lamp and electronics. Lamp housing include condensing optics to produce a 25mm collimated light beam. 50mm collimated light beam can also be provided upon request.

p>The objective of this experiment is to observe non-linear effect, second harmonic generation in 2nd order non linear crystals. Second harmonic generation (also called frequency doubling or abbreviated SHG) is a nonlinear optical process, in which photons with the same frequency interacting with a nonlinear material are effectively "combined" to generate new photons with twice the energy, and therefore twice the frequency and half the wavelength of the initial photons.

 

Due to nonlinear atomic polarization, crystals can emit a different frequency of light other than absorbed. In order to see the second order effect of atomic polarization, which causes doubling in frequency of the incident light, the incident light must be intense and coherent source, like a laser. Potassium Dihydrogen Phosphate (KDP), Urea etc. are the crystals that exhibit nonlinear polarization properties. When light hits a crystal, it excites the atomic dipoles. In classical optics, it is assumed that this polarization of atoms is linear to the magnitude of electrical field of the incident light. In reality, this polarization is a nonlinear phenomenon, but the nonlinear components are evident only for high intensity.

 

 

The RHANDY is a very user friendly and economical solution for those requiring a portable radiation and contamination monitor. This portable handheld instrument will instantly detect and measure radioactivity on clothing, food, water and the environment.

The user selectable alarm thresholds can be set to the desired radiation levels or the recommended factory default alarm thresholds can be used. Operation of the RHANDY is completely automatic, once the easy-to-set operational parameters have been configured. Simply position the unit in close proximity to the object that needs to be scanned and listen for the varying audio alarm to sound and observe the large easy to read display.

In addition to the quick response, the RHANDY can be used to monitor accumulated dose. Locate the unit near the air intake of a building for the tracking of accumulated dose of air filters or intake pathways. Tracking of an air intake filter will provide vital information in determining when to shut down a system or when to change the filter

The RC22 and RC23 are designed to allow fast and easy inspection of areas, containers or vehicles that may contain radioactive material.

Fully automatic, the unit will set an alarm threshold after performing a background check. When radiation is detected, the display will immediately show the increasing radiation levels. An audio alarm will also be activated to help locate the exact source of the radiation. The tone varies based upon the proximity and intensity of the radioactive source.

The MSPEC is a fast responding palm size Spectroscopic Personal Radiation Detector (SPRD) that will instantly measure any material for the presence of radioactivity.

The MSPEC Gamma-Ray Spectrometer utilizes a Sodium doped Cesium Iodide crystal and state of the art electronics for the most accurate results.
Operation of the MSPEC is completely automatic, once the easy-to-set operational parameters have been decided. The system allows for displaying units of measure as Counts per Second (CPS), Dose-Rate (nSv/h), Exposure Rate (µR/h), or Accumulated Dose (nSv).

The MSPEC meets ANSI 42.48:2008 American National Standard Performance Requirements for Spectroscopic Personal Radiation Detectors (SPRDs) for Homeland Security.

5V6A Lithium Battery Charge Discharge Capacity Cycles Tester for Cylinder Cell and Pouch Cell

30V10A Lithium Battery Testing System for Big Battery and Battery Pack Analyzing

Product Details:

Established as a Partnership firm in the year 2020, we “Wee Scientifics” are a leading Manufacturer and Trader of a wide range of Refrigerated Centrifuge, Digital Water Bath, Magnetic Stirrer, etc.