Scientific Instruments

Product Details:

Brand                      V-TECH

Material                   Aluminium

Display Type            Analog

Usage/Application    Laboratory

Color                       Black

Country of Origin      Made in India

Product Details:

The "Stein Hall Viscosity Cup" is used in viscosity testing where the number of seconds required for a set volume of adhesive to flow through the viscometer's orifice. Viscosity is an important property of starch based adhesives and strongly affects bonding at the corrugator. Some pastes are too thick for certain paper and some are too thin, this is where viscosity testing is important. The apparent viscosity of adhesives used in the manufacture of corrugated container board is measured by the number of seconds required for 100 cc of adhesive to pass through an orifice in a disc. The readings obtained do not directly correspond with any other viscosity scale.

Instrumentation , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?

Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported

 

• Laboratory Instrument, Test Equipment,
• Scientific, Measuring, Precision Instrument,
• Analytical, Bio Medical, Survey, Electrical,
• Electronic Instruments ,Weather, Metrology.

Product Details:

 

Description of the experimental set-up

1. Probes Arrangement
It has four individually spring loaded probes. The probes are collinear and equally spaced. The probes are mounted in a teflon bush, which ensure a good electrical insulation between the probes.

A teflon spacer near the tips is also provided to keep the probes at equal distance. The whole – arrangement is mounted on a suitable stand and leads are provided for the voltage measurement.

2. Sample

Germanium crystal in the form of a chip

3. Oven

It is a small oven for the variation of temperature of the crystal from the room temperature to about 200°C (max.)

4. Four Probe Set-up, DFP-02

The set-up consists of three units in the same cabinet.

(i) Multirange Digital Voltmeter

In this unit, intersil 3½ digit single chip A/D Converter ICL 7107 has been used. It has high accuracy like auto zero to less than 10μV, zero drift of less than 1μV/ °C, input bias current of 10pA max. and roll-over error of less than one count. Since the use of internal reference causes the degradation in performance due to internal heating, an external reference has been used.

Specifications:

• Range X1 (0-200mV) & X10 (0-2V)
• Resolution 100μV at X1 range
• Accuracy ±0.1% of reading ±1 digit
• Impedance 1MW
• Display 3½ digit, 7 segment LED (12.5mm height) with auto polarity and decimal indication Overload Indicator Sign of 1 on the left & blanking of other digits

 

(ii) Constant Current Generator
It is an IC regulated current generator to provide a constant current to the outer probes irrespective of the changing resistance of the sample due to change in temperatures. The basic scheme is to use the feedback principle to limit the load current of the supply to preset maximum value. Variations in the current are achieved by a potentiometer included for that purpose. The supply is a highly regulated and practically ripple free d.c. source. The current is measured by the digital panel meter.

Specifications:

• Open Circuit Voltage : 18V
• Current range : 0-20mA
• Resolution : 10μA
• Accuracy: ±0.25% of the reading ±1 digit
• Load regulation: 0.03% for 0 to full load
• Line Regulation: 0.05% for 10% changes

 

(iii) Oven Power Supply
Suitable voltage for the oven is obtained through a step down transformer with a provision for low and high rates of heating. A glowing LED indicates, when the oven power supply is ‘ON’. The experimental set-upis complete in all respect.

Instrumentation , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?

Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported

• Laboratory Instrument, Test Equipment,
• Scientific, Measuring, Precision Instrument,
• Analytical, Bio Medical, Survey, Electrical,
• Electronic Instruments ,Weather, Metrology.

Product Details:

We manufacture and supply sonicators for Nano Technology and other laboratory /research  purpose,  that are of high quality and well known for its features such as reliability, high performance and durability.We ensure that our products match the international standards of quality.

Instrumentation, is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?

Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported

 

• Laboratory Instrument, Test Equipment,
• Scientific, Measuring, Precision Instrument,
• Analytical, Bio Medical, Survey, Electrical,
• Electronic Instruments ,Weather, Metrology.

Product Details:

Consists of a metallic frame bearing a movable rod with cap at one end avicat mould 70mm in dia at the base, 50mm at the top and 40mm high and with a glass base plate consistency plunger intial and final needless in anice Jewellary case. 

Instrumentation , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?

Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported

 

• Laboratory Instrument, Test Equipment,
• Scientific, Measuring, Precision Instrument,
• Analytical, Bio Medical, Survey, Electrical,
• Electronic Instruments ,Weather, Metrology.

Product Details:

This is a very versatile multipurpose equipment for the measurement of low dc currents. It has 6 decade ranges with 100% over-ranging from 10-9A to 10-4A. For the ease, readings are directly obtained on a 3½ digit DPM. The instrument uses a well designed precision FET input electrometer operational amplifier AD549, which offers the lowest input bias currents (50fA with ±5V supplies) available in any standard operational amplifier. The excellent characteristics of AD549, ultra low bias current, low offset voltage, low drift and low noise have been fully utilized to obtain best results in the present picoammeter. The first operational amplifier AD549 is used in low level current to voltage configuration and the output has been directly read on a 3½ digit panel meter. The instrument is capable of accepting either polarity of the input current. Well regulated power supplies are incorporated to use the instrument upto 10% changes in a.c. main’s voltage.

 

Applications:

• Current from Photomultiplier tubes, Photometers etc.
• Leakage currents in solid state devices.
• FET gate and tube grid-voltage without loading errors
• Current through very high resistance’s in conjunction with a power supply

Instrumentation , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?

Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported

 

• Laboratory Instrument, Test Equipment,
• Scientific, Measuring, Precision Instrument,
• Analytical, Bio Medical, Survey, Electrical,
• Electronic Instruments ,Weather, Metrology.

Product Details:

Probes Arrangement

It has two individually spring loaded probes. The probes arrangement is mounted in a suitable stand of high quality alumina which also holds the sample plate. To ensure the correct measurement of sample temperature, the thermocouple junction is embedded in the sample plate just below the sample. This stand also serves as the lid of temperature controlled oven.

 

Proper leads are provided for connection to Capacitance Meter and Temperature Controller.

 

Sample

• Modified lead titanate (test sample)

 

Oven

• This is a high quality temperature controlled oven. The heating element used is a high grade Kanthal-D. It is cover. Further the top portion is also suitably covered to meet the safety standard. The oven has been designed for fast heating and cooling rates, which enhances the effectiveness of the controller.

 

Main Units

• The Set-up consists of two units housed in the same cabinet.

 

(i) Temperature Controller

• It is a high quality PID controller where the temperatures can be set and controlled easily. P, I and D can be adjusted by the user and can also be kept on Auto-tuning.

Features:

• LCD Display
• Data - Hold Switch (HOLD)
• Cx+, Cx - Input Jack
• Back Light Button Switch
• Rotary Switch: Use this switch to select functions and ranges
• Wide measuring range, covering 9 measuring sections from 0.1pf to 20,000μF that includes nominal value of any capacitance
• Power: One 9V battery

Instrumentation , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?

Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported

 

• Laboratory Instrument, Test Equipment,
• Scientific, Measuring, Precision Instrument,
• Analytical, Bio Medical, Survey, Electrical,
• Electronic Instruments ,Weather, Metrology.

Product Details:

These viscometers are designed for viscosity tests of petroleum products. Two adaption of redwood viscometer are available No.1 for liquids having redwood flow 20 seconds to 2000 seconds and No.II for liquids whose flow time exceeds 2000 seconds. The complete out fit comprises hammer finished copper chamber bath with electrical heating arrangments suitable to operate at 220 Volts AC mains with tap, silver plated oil cup with precision stainless steel jet, cup, cover ball, valve, thermometer- clip. Stirrer and M.S. sheet stand with levelling screws. 

Optional Accessories:

• Spare cup with valve
• Flask receiver 50ml capacity
• 8c low range thermometer
• 9c medium range thermometer
• 10c high range thermometer

 

Instrumentation , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?

Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported

 

 

• Laboratory Instrument, Test Equipment,
• Scientific, Measuring, Precision Instrument,
• Analytical, Bio Medical, Survey, Electrical,
• Electronic Instruments ,Weather, Metrology.

Additional Information:

• Delivery Time: 1-2 week

Product Details:

This sieve shaker is designed to carry up to 7 sieves of 6 inch or 8 inch diameter.The 12 inch dia.sieves can be used with the help of Adaptor. A 1/4 HP. motor througha reduction gear immersed in oil drives the shaker. The sieve table dies not rotatebut is inclined from the vertical axis and the direction of inclination changesprogressively in clockwise direction. If the stop-pin below the table is removed. Theshaker can have a rotary motion. In addition to this gyratory motion of the table,there is an upward and downward movement ensuring that each square cm of thesieve is utilized. A pair of rods and a holder is supplied. The holder can be fixed onthe top of the upper most sieves, and thus the sieve set is firmly held. Suitable foroperation on 230 volts, 50 cycles single phase A.C. Supply. This sieve shaker isdesigned to carry up to 7 sieves of 18" diameter. The shaker is driven by a1/2H.P.Electric Motor through a reduction gear. The sieve table does not rotate but isinclined from the vertical axis and the direction of inclination changes progressively inthe clockwise direction, in addition to this gyratory motion of the table, there is anupward and downward movement at a frequency of about 270 vibrations per minutesensuring that each square inch of the sieve is utilized. The whole gear mechanismruns in an oil bath, without test sieves or time switch. Suitable for operationfrom 220 Volts 50 cycles A.C. supply.

Product Details:

Used for determining the viscosity of fuel oil and lubricating oil both thin & thick. The apparatus consists of stainless steel bath with oil cup which is centrally placed in a water bath. The bath has a lid which contains a water cooling tube, two handle with two stirrer blades, thermometer socket and straight heater, stirring is done by turntable arrangement. A thermometer can also be inserted into the cup cover. The jet one universal and one furol can be screwed to the cup by a handle (without strainer, withdrawel tube and glasswares). can operate on 220 volts AC mains.

• VT-567 Saybolt Viscometer gas heated (without burner)
• VT-568 Saybolt Viscometer electric heated wihtout control
• VT-569 Saybolt Viscometer electric heated with seperate energy regulator.
• VT-570 Saybolt Viscometer electric heated with solid state electronic control (Voltage varric).
• VT-570C Same as above with copper coil tube voltage varric.
• VT-570D Same as above with digital temperature controller cum indicator.
• VT-570A Two Saybolt tubes Viscometer electric heated with double walled with control.
• VT-570B Same as above with 4 saybolt

Product Details:

Flow Cup Viscometer made of brass with SS orifice 
Supplied complete with stand equipped, level adjustment system with level indicator, operation manual with efflux time conversation chart
Available Sizes: B2, B3, B4, B5, B6, B8, B10. with or without calibration certificate. 

Ford Cup Viscometer for easy measurement of the viscosity of paints, inks, lacquers and other liquids. All ford cups are machined anodic oxidation aluminium with fixed / removable stainless steel orifice and are guaranteed to be within 2% throughout the recommended range of use. 

          

Instrumentation , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?

Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported

 

• Laboratory Instrument, Test Equipment,
• Scientific, Measuring, Precision Instrument,
• Analytical, Bio Medical, Survey, Electrical,
• Electronic Instruments ,Weather, Metrology.

Product Details:

Study of Dielectric Constant and Curie Temperature of Ferroelectric Ceramics

 

Dielectric or electrical insulating material are understood as the material in which electrostic field can persist for long times. Layers of such substance are commonly inserted into capacitors to improve their perfomance, and the term dielectric refers specifically to this application. An electric field polarizes the molecules of dielectric producing concentrations of charge on its surface that create an electric field opposed (antiparallel) to that of capacitor. This reduces the electric potential. Considered in reverse, this means that, with a dielectric, a given electric potential causes the capacitor to accumulate a larger charge.

 

Applications

Beside the common and well known application of capacitors in electrical and electronic circuits, the capacitors with an exposed and porous dielectric can be used to measure humidity in air.

A huge leap in the research on dielectric (ferroelectric materials) came in 1950’s, leading to the wide spread use of Barium Titanate (BaTiO3-Perovskite Structure) based ceramics in capacitor applications and piezoelectric transducer devices. Since then, many other ferroelectric ceramics have been developed and utilized for variety of applications: various type of capacitors, non volatile memories in computers, etc.

 

Perovskite Structure

Perovskite is family name of a group of materials and the mineral name of calcium titanate (CaTiO3) having a structure of the type ABO3 (Fig 1)

 

A practical advantage of perovskite structure is that many different cations can be substituted on both A and B sites without changing the over all structure. Even though two cations are compatible in solution, their behaviour can be radically different when apart from each other. Thus it is possible to manipulate material’s properties such as Curie temperature or dielectric constant with only a small substitution of given cation.

 

All ferroelectric material have a transition called the Curie point (Tc). At T>Tc, the crystal does not exhibit ferroelectricity, while for T

 

Fig 2 shows the variation of dielectric constant (e) with temperature for Lanthanum doped Lead Zirconate Titanate (PLZT) ceramic, which is cooled from its paraelectric cubic phase to ferroelectric rhombohedral phase.

Instrumentation , is  in the field of Instrumentation Sales Service & Repairs with 40 years of experience.  We provide service & repairs to your old high precision instruments and equipment.  We provide cost effective service & Repair to any brand, any make instruments  with service warranty. Why not try once?

Instruments of Any Type, Any Make, Analog/Digital, Any Condition  Indian or  Imported

 

 

• Laboratory Instrument, Test Equipment,
• Scientific, Measuring, Precision Instrument,
• Analytical, Bio Medical, Survey, Electrical,
• Electronic Instruments ,Weather, Metrology.