 | SES Instruments Pvt. Ltd.Roorkee, Uttarakhand |  Year of Establishment: 2009 |  |
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| Control Laboratory Experiments (22)
Experimental Setup (11)
Laboratory Experiments (22)
Laboratory Instruments (13)
| Laboratory Instruments
Digital D.C. Microvoltmeter We offer precision Digital Microvoltmeter very usefull in general laboratory and R&D labs. It is a very versatile multipurpose instrument for the measurement of low dc voltage. It has 5 decade ranges from 1mV to 10V with 100% over-ranging. For better accuracy and convenience, readings are directly obtained on 3½ digit DPM (Digital Panel Meter). This instrument uses a very well designed chopper stabilized IC amplifier. This amplifier offers exceptionally low offset voltage and input bias parameters, combined with excellent speed characteristics. Filter circuit is provided to reduce the line pickups of 50Hz. All internal power supplies are IC regulated. Highlights
Applications - DC voltage measurements from high impedance sources; output of photomultiplier tubes, hotocells, radiation detector etc. - Very low voltage measurement, direct measurement of thermocouple output to read temperatures with a resolution of 1/40th of a degree (Chromel-Alumel). - General purpose laboratory instrument for voltages upto 19.99V DC. (Hall Effect, Four Probe, Thermoluminescence, Transistor and Diode characteristics etc.) Specifications Range: 1mV, 10mV, 100mV, 1V & 10V with 100% over-ranging. Resolution: 1μV Accuracy: ±0.2% ±1 digit Stability: Within: ±1 digit Input Impedance: >1000MΩ (10MΩ on 10V range) Display: 3½ digit, 7 segment LED with autopolarity and decimal indication 
Digital Gaussmeter We offer Digital Gaussmeter, DGM-204 operates on the principle of Hall Effect in Semiconductors. A semiconductor carrying current develops an electromotive force, when placed in a magnetic field, in a direction perpendicular to the direction of both electric current and magnetic field. The magnitude of this e.m.f. is proportional to the field intensity if the current is kept constant. This e.m.f. is called the Hall Voltage. The small Hall Voltage is amplified through a high stability amplifier so that a millivoltmeter connected at the output of the amplifier can be calibrated directly in magnetic field unit (gauss). Applications
Resolution: 0.1 gauss at 0.1 kilogauss range Range: 200KG, 2KG, 20KG and 40KG Accuracy: ±0.5%, ±½ digit at 1KG to 20KG range ±1%; ±1 digit at 0.1KG range Temperature: Upto 50°C Display: 3½ digit, 7 segment LED DPM with auto polarity and overflow indication Power: 220V ±10%, 50Hz Transducer: Hall Probe – InAs Special Feature: Indicate the direction of the magnetic field Weight: 3Kg
Digital Gaussmeter We offer precision Digital Gaussmeter, DGM-103 usefull in general laboratory and R&D labs. It operates on the principle of Hall Effect in Semiconductors. A semiconductor carrying current develops an electromotive force, when placed in a magnetic field, in a direction perpendicular to the direction of both electric current and magnetic field. The magnitude of this e.m.f. is proportional to the field intensity if the current is kept constant. This e.m.f. is called the Hall Voltage. The small Hall Voltage is amplified through a high stability amplifier so that a millivoltmeter connected at the output of the amplifier can be calibrated directly in magnetic field unit (gauss). Highlights
Range: 0-2KG, 0-20KG & 0-40KG Resolution: 1G at 0-2KG range in normal mode 1G at 20KG & 40KG range in differential mode Accuracy: ± 0.5% Temperature: Upto 50°C Display: 3½ digit, 7 segment LED DPM with auto polarity and overflow indication Power: 220V ±10%, 50Hz Transducer: Hall Probe – InAs Special Feature: Indicate the direction of the magnetic field Weight: 3Kg
Digital Gaussmeter We offer precision Digital Gaussmeter very usefull in general laboratory and R&D labs. It operates on the principle of Hall Effect in Semiconductors. A semiconductor carrying current develops an electromotive force, when placed in a magnetic field, in a direction perpendicular to the direction of both electric current and magnetic field. The magnitude of this e.m.f. is proportional to the field intensity if the current is kept constant. This e.m.f. is called the Hall Voltage. The small Hall Voltage is amplified through a high stability amplifier so that a millivoltmeter connected at the output of the amplifier can be calibrated directly in magnetic field unit (gauss). Applications
Resolution: 1 gauss at 1 kilogauss range Range: 1KG and 10KG with 100% overranging Accuracy: ±0.5% Temperature: Upto 50°C Display: 3½ digit, 7 segment LED DPM with auto polarity and overflow indication Power: 220V ±10%, 50Hz Transducer: Hall Probe – InAs Special Feature: Indicate the direction of the magnetic field Weight: 3Kg
Digital Gaussmeter, DGM-102 We offer an equipment Digital Gaussmeter operates on the principle of Hall Effect in Semi-conductors. A semiconductor carrying current develops an electromotive force, when placed in a magnetic field, in a direction perpendicular to the direction of both electric current and magnetic field. The magnitude of this e.m.f. is proportional to the field intensity, if the current is kept constant. This e.m.f. is called the Hall Voltage. The small Hall Voltage is amplified through a high stability amplifier so that a millivoltmeter connected at the output of the amplifier can be calibrated directly in magnetic field unit (gauss). Highlights
Wide application in industry where accurate measurements of magnetic field is required. Measurement of steady magnetic field e.g. in loud speakers, dynamos, moving coil instruments etc. Useful in laboratory experiments involving electromagnets. Specifications Range: 0-2KG & 0-20KG Resolution: 1G at 0-2KG range Accuracy: ±0.5% Temperature: Upto 50oC Display: 3½ digit, 7 segment LED DPM with auto polarity and over flow indication Power: 220V ±10%, 50Hz Transducer: Hall Probe – InAs Special Feature: Indicate the direction of the magnetic field Weight: 3Kg Dimensions: 280mm X 255mm X 120mm Digital Microscope Introduction The digital microscope is a powerful device which can be used is almost any application where magnification is required. It can be used as a travelling microscope, biological microscope, student microscope, industrial microscope etc.
Digital Nanoammeter We offer precision Digital Nanoammeter very usefull in general laboratory and R&D labs. It is a rugged and low cost instrument, is a product of extensive R&D using high input impedance integrated circuits. It has 4 decade ranges with 100% over-ranging. The unit is suitable for current measurement in the range of 100pA to 200µA. For the ease, readings are directly obtained on a 3½ digit DPM. The instrument is capable of accepting either polarity of the input current. The very low leakage current of the input stage combined with the high linearity fast response due to high negative feedback enables accurate and easily reproducible measurements. The instrument uses a FET input operational amplifier that offers the very low input bias current, low offset voltage, low drift and noise. These characteristics have been fully utilized in the present Nanoammeter. This operational amplifier is used in low level current to voltage configuration. Highlights
Range: 100nA, 1mA, 10mA, 100mA with 100% over-ranging Accuracy: 0.2% for all ranges Resolution: 0.1nA Input Resistance: 25Ω, 2.5Ω, 0.25Ω, 0.025Ω Display: 3½ digit 7 segment LED (12.5mm height) with auto polarity and decimal indication Input: Through amphenol connector Power Supply:220V±10%, 50Hz Weight: 2.5Kg Dimensions: 240mm X 275mm X 120mm
Digital Picoammeter We offer precision Digital Picoammeter very usefull in general laboratory and R&D labs. 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. Features
Applications
Multiplier: X1, X10, X102, X103, X104, X105 Accuracy: 0.2% for all ranges Resolution: 1pA, 10pA, 100pA, 1nA, 10nA, 100nA Input Resistance: 2.5KΩ, 0.25KΩ, 25Ω, 2.5Ω, 0.25Ω, 0.025Ω Display: 3½ digit 7 segment LED (12.5mm height) with auto polarity Input: Through amphenol connector Power Supply: 220V ±10%, 50Hz Weight: 2.5Kg Dimensions: 240mm X 275mm X 120mm
Electromagnet & Power Supply We manufacture Electromagnet, EMU-75 which has the most widely used ‘U’ shaped soft iron yoke. The soft iron is of a special quality, structurally uniform, well machined and finished to meet the rigid standards. The air-gap is continuously variable upto 75mm with two way knobbed wheel screw adjusting system. Normally flat pole pieces are supplied. Tappered pole pieces can be supplied on special request. The coils are wound on non-magnetic formers with uniform layers of S.E. copper wire. The new and modern design of the coils provides good thermal conductivity characteristics and eliminates troublesome hot spots even at high magnetic fields. Specifications of Electromagnet are as follows: Field Intensity: 11KG at 10mm air-gap with flat pole pieces Pole Pieces: 75mm diameter Energising Coils: Two, each having a resistance of about 12Ω Power Requirement: 0-90Vdc, 3A, if coils are connected in series. 0-45Vdc, 6A, if coils are connected in parallel Weight: 81Kg DPS-175 is designed to be used with the Electromagnet, Model: EMU-75 as a constant current power supply to generate magnetic field upto 11KG. The current requirement of 3A per coil, i.e. a total of 6A was met by connecting six closely matched constant current sources in parallel. In this arrangement the first unit works as the ‘master’ with current adjustment control. All others are ‘slave’ units generating exactly the same current as the master. All the six constant current sources are individually IC controlled. One advantage of this arrangement is that if a particular constant current source develops a fault, still the remaining channels would continue to operate albeit with a reduced maximum current capability. The supply is protected against overload, short circuit and transients caused by the load inductance. Specifications of Power Supply, DPS-175 are as follows: Current Range: Smoothly adjustable from 0-3A per coil, i.e. 6A Load Regulation: 0.1% for load variation from 0 to max. Line Regulation: 0.1% for ±10% mains variation Display: 3½ digit, 7 segment LED DPM Power: 220V ±10%, 50Hz Weight: 13Kg
Electromagnet & Power Supply We manufacture electromagnet which is designed and developed as per quick method experiments. This enables us to achieve Hall Effect as well as magnetic susceptibility in our electromagnet. Power Supply is an inexpensive and high performance constant current source suitable for small and medium sized electromagnets. Although the equipment is designed for the Electromagnet, Model: EMU-50, it can be used satisfactorily with any other electromagnet provided the coil resistance does not exceed 6W. Some of the features of Electromagnet are as follows:
Some of the features of Power Supply are as follows:
Function Generator We offer Function Generator very usefull in general laboratory and R&D labs. This is an economically priced signal source for a wide variety of applications in electronics, communication and control systems laboratory. The IC used is a high frequency function generator that produces low distortion sine, triangular, sawtooth and square waveforms from frequencies less than a Hz. To 20MHz. A minimal of external components are needed which make the unit very reliable and robust. The desired output waveform is selected by logic control and may therefore be done electronically as well. Basic principal of function generation used is the relaxation oscillation with periodic charging and discharging of a capacitor through constant current source. The charging/discharging currents are accurately controllable and the associated circuits support high frequencies very well. A sine shaping circuit coverts the triangular waveform to sine wave of constant amplitude. The sine wave is useful for frequency response studies of amplifiers, filters and other electrical systems, while the square wave finds applications in transient response studies. Triangular wave is a standard input signal for the study of steady state error in feedback control systems. All power supplies are IC regulated. Highlights
Specifications Waveforms: Square/ Sine/ Triangular (switch selectable) Frequency: 10 Hz - 2 MHz in five ranges Amplitude: Square 0-3V (p-p) Triangular 0-3V (p-p) Sine 0-3V (p-p) Output Impedance: 50 Ω Frequency Readout: 4-digit, counter based, automatic decimal point Power Supply: 220V±10%, 50 Hz
High Voltage Power Supply We offer precision High Voltage Power Supply very usefull in general laboratory and R&D labs.Power supply, EHT-11 principle of operation is entirely different from conventional supplies, and thereby eliminating many drawbacks; bulky high voltage transformer, need of high voltage components and excessive heating of components etc., associated with them. This power supply consists of a stable power oscillator whose output is controlled by an input signal. The output of this oscillator is boosted with the help of a step-up transformer and then rectified and filtered. A portion of this output is compared with a high stability, temperature compensated reference and the error signal is used in the feedback path to control the oscillator’s output. There is a built-in protection against accidental overloading. For high reliability, compactness and ruggedness, integrated circuits are extensively used along with a few discrete silicon devices. The components are mounted in a glass epoxy printed circuit card. Highlights
EHT-11 is designed to meet the power requirements of a broad range of radiation detectors: G.M. Counters, lonization Chambers, Scintillation Detectors, Photo- multiplier Tubes and any application where a high voltage source with high degree of regulation and stability is required. Specifications Output: 0-1500V continuously adjustable Current: 1mA (max.) Polarity: +ve or -ve, as required Regulation: ±0.05% for 0 to 1mA load Stabilization: ±0.02% for ±10% mains variation Display: 3½ digit, 7 segment LED DPM Connection: Output through a amphenol connector on the front panel Protection: Fully protected against overload and short circuit by current limiting technique Power requirements: 220V ±10%, 50Hz Weight: 5Kg Dimensions: 240mm X 390mm X 130mm
IC Regulated Power Supply We offer IC Regulated Power Supply, it is general purpose power supply consists of four independent fixed voltage regulated sources viz. +12 V, -12 V, +5 V and -5 V referred to a common ground. The current rating for each is specified at 300 mA, although it is possible to exceed this limit safely when all four sources are not operating simultaneously. The compact power supply unit is well suited for any general laboratory which uses linear and digital circuits and IC's. At the same time the excellent performance of the 3-terminal regulators enables the supplies to be used equally satisfactorily for sophisticated instrumentation applications. The built-in protection of the regulator in the form of over current and safe area shutdown ensure continued fault free operation of the unit without any maintenance. SPECIFICATIONS : Output voltage: + 12 V, - 12 V, + 5 V, - 5 V fixed Current: 300 mA (each supply) Line Regulation: ± 0.05 % for 10 % variation of mains voltage. Load Regulation: ± 0.1% for a full load of 300 mA Protection: Thermal and overcurrent. Dimensions: 210 mm X 180 mm X 100 mm Weight: 2.25 Kg
PID Controlled Oven We offer this instruments in two parts viz. PID Controlled electronics and a small oven. The oven has been designed for fast heating and cooling rates which enhances the effectiveness of controller. Heater is wound over a brass are side closed brass cylinder and no insolation is provided between the heater and ambient, which enhances its rate of heating and cooling. The temperature is sensed by RTD (A class). The basic design of the controller is around the PID configuration for its obvious advantage, wastage of power is avoided by using a pulse width modulation (PWM) switch. This combination has the advantage of both ON-OFF controller and a linear PID Controller. The result is a good stable and accurate temperature control. Specifications of the Oven Temperature Range: Ambient to 200°C Stability: Short Range: ±0.2°C Long Range: ±0.5°C Measurement Accuracy: ±0.5°C (typical) Oven Dimensions: Heating Chamber inner Diameter: 25mm, Height: 100mm Sensor: RTD (A class) Display: 3½ digit, 7 segment LED (12.5mm)
Travelling Microscope We offer Travelling Microscope in this, the bed is of a heavy casting, thoroughly aged and machined, is fitted with leveling screws. On the dovetail guide ways slides the horizontal carriage which can be clamped at any position by means of a thumbscrew. A second sliding carriage slides along a gunmetal vertical pillar fitted on the horizontal carriage. The slow motion guide bars are made of sturdy material and the motion is very smooth. Microscope Tube Inclinable in any angle. true vertical and horizontal positions marked focusing. Scales and Verniers Made of lifetime Stainless Steel. Optics (i) True achromatic objective with 7.5 cm, focusing distance from object. (ii) 10X Ramsden Eyepiece with fine cross wire. Scale and Vernier (i) Horizontal scale: 18 cm divided at 1mm interval (ii) Vertical scale: 16cm divided at 1mm interval (iii) Screw gauge dial: 100 divisions with a least count of 0.01mm
Travelling Microscope We offer Travelling Microscope in this, the bed is of a heavy casting, thoroughly aged and machined, is fitted with leveling screws. On the dovetail guide ways slides the horizontal carriage which can be clamped at any position by means of a thumbscrew. A second sliding carriage slides along a gunmetal vertical pillar fitted on the horizontal carriage. The slow motion guide bars are made of sturdy material and the motion is very smooth. Microscope tube inclinable in any angle. True vertical and horizontal positions marked focusing. Scales and Verniers Made of lifetime Stainless Steel. Optics (i) True achromatic objective with 7.5 cm, focusing distance from object. (ii) 10X Ramsden Eyepiece with fine cross wire. Scale and Vernier (i) Horizontal scale: 180 mm with a screw gauge type motion (ii) Vertical scale: 150mm with a vernier scale (iii) Lateral Scale: 60mm with a vernier scale (iv) Least Count: 0.01mm on all scales
True RMS A.C. Millivoltmeter We offer precision True RMS A.C. Millivoltmeter, ACM-102 & ACM-103. ACM-102: True RMS A.C. Millivoltmeter, ACM-102 is based on AD536. This is a completely monolithic integrated circuit which performs true rms-to-dc conversion of any waveform. The true rms value of a waveform is more useful quantity than average rectified value, since it relates directly to the power of the signal. The crest factor compensation scheme of the AD536 allows measurement of highly complex signals with wide dynamic range. The crest factor is often overlooked in determining the accuracy of an ac measurement. Crest factor is defined as the ratio of the peak signal amplitude to the rms value of the signal (C.F.=Vp/Vrms). Input signal is appropriately processed through a FET input wide band, extremely fast settling time, low noise amplifier. ACM-103: In model ACM-103 besides all features of ACM-102, an IC based 1KHz oscillator followed by a buffer, is in-built. This eliminate the need of an external oscillator for purpose, such as determination of h-parameters of a transistor, bridge measurement etc., where spot frequency of 1KHz is most commonly used. Highlights
Applications
Voltage Range: 20mV, 200mV, 2V and 20V Frequency Range: 10Hz to 200KHz Input Impedance: 1MW shunted by 25pf on all ranges Accuracy: 1% in the range 10Hz-100KHz; 2% in the range 100KHz-200KHz Display: 3½ digit, 7 segment LED (12.5mm height) with decimal and overflow indication Power Supply: 220V ±10%, 50Hz Weight: 2.5Kg & 3Kg Accessories: 75cm shielded cable with a coaxial connector at one end and banana plugs on the other end Specification of ACM-103 (Additional Features) Oscillator Output: 0-300mV continuously variable Frequency: 1KHz fixed
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