| » 16/11/2011 |
| Scanning Spectrometer |
Scanning spectrometer is specially designed and developed for industrial and academic research laboratories in the fields of biology, chemistry, physics, environmental science and engineering. This device works in the wavelength range of 350 to 960nm. Scanning spectrometer can rapidly scan a range of wavelengths and record light intensity at each wavelength. |
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| Features: |
► Multitude of research and laboratory applications
► High resolution spectral analysis (0.1nm) of
spectral emission and absorption lines
► High wavelength accuracy
► 350 - 960nm spectral range in a single scan |
| ► Optional photomultiplier and silicon photo diode detector |
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| » 15/06/2011 |
| Kerr Effect Apparatus |
The apparatus makes use of the rotation of the polarized light by the Kerr cell (the material exhibiting the Kerr effect). The light is passed through a polarizer, then sent to the Kerr cell and finally made to fall on a photodetector. Initially, the polarizer-Kerr cell-analyzer combination is adjusted so that no light is transmitted when the electric field is not applied. When the electric field is applied to the Kerr cell, the cell will further rotate the polarization of the light and the detector will see a fraction of the original intensity of light. |
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| Objective of the Experiment using the apparatus : |
| 1 To study the variations in birefringence with respect to applied voltage in an electro optic liquid (Nitro Benzene C6H5NO2) |
| 2. Determination of half-wave voltage U(λ/2) of the cell |
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| » 06/04/2011 |
| Peristaltic Pump |
Holmarc offers range of peristaltic pumps for dispensing, filling, dosing, sampling and transferring applications. The advantage of using peristaltic pump is that no contamination will occur to the fluid or to the pump. To use a different fluid, all you need to do is to change the tubing used to pump the fluid. The flow rate will be accurate and there will not be any reverse flow or back flow. Our equipment is ideal to use with corrosive or viscous liquids. Instant start or stop and reverse facility is available in our standard model. |
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| Multi channel peristaltic pump |
| Model |
Item |
| HO-LS-PP-01 |
Single channel |
| HO-LS-PP-02 |
Two channel |
| HO-LS-PP-04 |
Four channel |
| HO-LS-PP-06 |
Six channel |
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The peristaltic pump is characterized by a special combination of fluid handling mechanism and design flexibility for multichannel applications. It is sometimes important in research laboratories and production plants to move several fluid channels simultaneously. Controlling multiple channels together can be a must for many applications. Varying the speed of the motor will at once vary the flow in all channels. |
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| » 19/03/2011 |
| Contact Angle Meter |
Holmarc’s Contact angle meter Model no: HO-IAD-CAM-01 is a CCD based instrument
used for measuring contact angles of liquids on solids as well as their Free
Surface Energy. The instrument uses sessile drop method which is the standard
method for quick and accurate wetting results for finding out Contact angles.
State-of-the-art optics, precise Opto-mechanics and high-resolution ccd detector
and associated electronics used in our instrument guarantee error free
measurements ensuring reproducible results. |
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Contact angle is the angle formed by a liquid at the phase boundary where a liquid, gas and solid intersect. The shape of the drop is controlled by the three forces of interfacial tension. Static Angle and Advancing Angle are quantitative measures of the wetting of a solid by a liquid, but they can also be used as a quality control measure in surface treatments and surface cleanliness. Receding Angle is a quantitative of the adhesion of a solid to a liquid. |
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| Technical Highlights |
● Warm light LED with variable intensity control ensures extreme low heat radiation.
● Precise travel adjustment provided for CCD with Optics assembly to fine focus the image.
● Manual micro syringe pump mechanism for precise micro liter deposition.
● Innovative technology for interchanging the syringes. Standard 100 micro liter syringe is provided with the system.
● Precision height adjustment, rotation stage and tilt control provided on the test base.
● Vibration inhibiting solid construction for sharp drop images.
● Powerful and user friendly windows software provided for image analysis.
● Live images can be viewed on the PC monitor showing the droplet on the solid surface reassures the operator of validity of the
contact angle measurement. Image capture and base-line definition are all automatic and quick. |
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| Optional Accessories |
Temperature control Bed for the test base.
The user can choose from a wide range of temperature from 30°C to 500°C for the most diverse applications. |
Motorized Syringepumpfor dispensing.
The user can use motorized syringe pump instead of manual syringe pump for dispensing liquids on to the test base. The dispensing rate, volume etc can be precisely controlled using the software provided with it. |
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| Specification: |
| Measuring method |
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Sessile drop method |
| Analysis method |
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● DropSnake analysis which is based on B-spline snakes (active contours) to shape the drop. |
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● LBADSA analysis which is based on the fitting of the Young-Laplace equation to the image data. |
| Measuring range |
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0 - 180 degree |
| Inaccuracy |
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+/- 0.1 degree |
| Optics |
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High performance aberration corrected imaging ens with precise manual focus adjustment. |
| Video System |
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High performance CMOS Sensor, Monochrome, 1280 x 1024 Pixel, 25 fps. |
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3m shielded USB cable included. |
| Lighting |
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LED Based diffused lighting mechanism. |
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Light intensity can be varied. |
| Dispensor |
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Mechanical dispenser with precise micrometer control. |
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100 micro litre syringe provided with the system. |
| Dimenson |
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350 x 125 x 350mm |
| Weight |
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Approx: 30 Kgs |
| Power supply |
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240VAC, 50 Hz. |
| Other Specifications |
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15mm height adjustment for Sample holder. |
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Tilting +/- 2 degree provided for the Sample holder. |
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360 degree rotatable option for the Sample holder. |
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25mm XY Travel provided for the CCD - Optics assembly. |
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Rotatable screws provided beneath the base for fine height adjustments. |
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| » 12/02/2011 |
| Spray Pyrolysis |
Holmarc’s spray pyrolysis system has been designed for research laboratories in thin films, especially for solar cell development. The system automates various fatigue and error creating processes involved in the technique when performed manually. Moreover, ergonomically designed chamber provides clean and healthy atmosphere suitable for modern lab conditions.
Parameters like dispensing rate of the solution and speed of spray head movement are controlled precisely which are difficult to be controlled in manual process. A positive displacement pump controlled by stepper motor and microprocessor is used to dispense solution as per requirement. The spray head movement is also controlled by stepper motor driven linear stages in X and Y direction. The temperature of the substrate heater plate is controlled independently through a dedicated controller.
A desktop computer with windows OS is used to control the operations through serial port. Our dedicated software for spray pyrolysis system can as well be used for documenting the relevant parameters used for sample preparation like temperature, air pressure, duration, etc. |
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| Specification: |
| Actuator |
Stepper motor |
| Dispensing unit capacity |
250ml & 500ml |
| Dispensing rate |
1-20ml / sec. |
| Sprayer |
| Drive speed X axis (min-max) |
10-200mm / sec |
| Drive speed Y axis (min-max) |
1-5mm / sec |
| Sprayer traverse |
X - Y 200mm max. |
| Substrate base plate |
| Dimension |
150 X 150mm |
| Max. temperature |
500°C |
| Power input |
230V, 50Hz |
| PC connectivity |
Serial port (RS 232) |
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Spray pyrolysis is a process in which a thin film is deposited by spraying a solution on a heated surface, where the constituent react to form a chemical compound. The chemical reactants are selected such that the products other than the desired compound are volatile at the temperature of deposition. The process is particularly useful for the deposition of oxides and has long been a production method for applying a transparent electrical conductor of Tin oxide (SnO2) or Stannic oxide to glass. |
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