Our product range includes a wide range of Electronics Lab Instruments such as Digital DO Meter, Hall Effect Experiment, Vaccum Tube Volt Meter - V.T.V.M., Digital Automatic Melting Point Apparatus, Microprocessor Spectrophotometer, L.C.R. Bridge and many more items.
Oxygen Dissolved in water, often referred to as DO is a very important parameter of water quality and is an index of physical and biological processes going on in water.
There are two main sources of dissolved oxygen in water (i) Diffusion of Oxygen from air to water is a physical phenomenon and depends upon solubility of oxygen which, in turn, is influenced by factors like temperature, water movements and salinity etc. Photosynthetic activity is a biological phenomenon carried out by autotrophs (mainly phytoplankton) in water and depends upon autotroph population, light conditions and available gases etc.
|Range D.O. ||0 to 20.0 ppm |
|Resolution D.O. ||0.1 ppm |
|Accuracy D.O. ||0.1 ppm + 1 count |
|Temp. Compensation ||0o C to 50o C Manual |
|Compensation D.O. ||+ 3% |
|D.O. Sensor type D.O. ||Amperometric Gold/Silver membrane |
|Display ||3 1/2 digit LED display |
|Power ||230V A.C. 50 Hz |
|Weight ||2 Kg |
|Standard Accessories |
|DO Electrode ||1 Nos. |
|Instruction Manual ||1 Nos. |
|D.O. Membranes ||10 Nos. |
The resistivity measurements of semiconductors can not reveal whether one or two types of carriers are present; nor distinguish between them. However, this information can be obtained from Hall Coefficient measurements, which are also basic tools for the determination of carrier density and mobilities in conjunctions with resistivity measurement.
Hall Effect experiment consists of the following:
- Hall Probe (Ge. Crystal Mounted on a PCB).
- Electromagnet 10,000 Gauss.
- Power Supply for Electromagnete.
- Constant Current Power supply with Two Digital Meters.
- Digital Milli votmeter 0-200mV sensitivity ± O.lmV
- Auto polarity
- Digital milli Ampere-meter 0-20mA
- sensitivity ± 0.01mA.
- Digital Gauss meter with Hall Probe, 20KG.
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Vaccum Tube Volt Meter - V.T.V.M.
Workable on 220 V 50 Hz compiled in steel cabinet, rectangular meter 110x90mm.
Suitable for measurement of A.C. / D.C., Resistance 0-1000M. Ohms in seven ranges R.F. 0.50 Volts R.M.S. in 4 ranges.
D.C. Range : 1.5, 5, 15, 150, 500, 1500 FS-D
A.C. Range : 1.5, 5, 15, 50, 150, 500, 1500 F.S.D.
Resistance : 1K, 10K, 100K, 1M, 10M, 100M, 1000M.
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Digital Automatic Melting Point Apparatus
- Auto Calibration
- Storage of 100 samples
- Printer attachment facility
- Soft touch membrane keys
|Display ||16 x 2 alpha numeric LCD display |
|Range ||0.1 uS to 100mS (6 decadic ranges) |
|Resolution ||0.1 |
|Accuracy ||+ 1% of F.S. + 1 digit |
|Calibration ||Auto / Manual |
|Temperature Range ||0 to 100oC |
|Cell Conatant ||0.1 to 5.0 |
|Storage ||Upto 100 samples |
|Power ||230V + 50Hz |
|Accessories ||Conductivity Cell, Temperature probe, Stand, Clamp, Dust cover, Manual |
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A versatile, Rugged, Easy to operate and Accurate Instrument to determine Absorbance, % Transmission and Concentration of Liquids.
- Fully Solid state instrument
- workable on 220 V 50 Hz or on 9 Volts Battery
- useful for the wide range measurement of Resistance
- Capacitance and Inductance.
- Resistance Range : 0.01 Ohms to 1 Meg Ohms in seven ranges.
- Capacitance 2 PF to 110 MFD.
- Inductance 2 micro Henries to 110 Henry in seven ranges
- Accuracy ±1%, D-0.001 to 10Q=1 to 10.
- Dimension 14"x9"x5½".
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Photo Cell Charcteristic Apparatus
Objective: To plot Forward & reverse Charcteristics of a Selenium Photo Cell verify Inverse Square Law of Light.
Features: selenium Photo Cell mounted in meal box having window for injecting light, light source with 60W lamp, Photocell kit with DC micro ammeter of 1000mA & DC Millivoltmeter of 500mV.
| Absorbance & %T Modes |
| Covers 400 to 700nm |
| Fast & Accurate Operations |
| Automatic Zero Calibration |
| 1ml. Solution Measurement |
| Standard German Glass Filters |
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|Std. Glass Filter ||8 |
|Mini Volume ||1 ml. |
|Display ||3 Digit, Bright Red 7 Segment LED |
|Range ||400-700 nm |
|Output ||OD: (0 to 1.99), %T: 0 to 199 |
|Resolution ||OD : 0.01, %T : 1% |
|Accuracy ||0.5% FSI |
|Detector ||Selenium Photocell/Photodiode |
|Light Source ||6.8v, 300mA |
|Power ||230V + 10%, 50 Hz. AC |
|Dimenstions ||220 x 180 x 125 mm (lxbxh) Approx. |
|Weight ||2 Kg. (Approx.) |
|Accessories ||Set of 5 Test Tube , Spare Lamp, Dust Cover & Manual |
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Microprocessor UV-Vis Spectrophotometer
| Cover 195 to 1000nm |
| 4 Position Cuvette Holder |
| RS-232C Computer Interface |
| High wavelength Precision |
| Compact & Good Looking Shape |
| Highly Accurate & Stable |
|Photometric Range ||% T:0 to 100%, Abs.:0 to 1.999 |
Conc.:0 to 1999, K-Factor:0 to 1999
|Accuracy ||+0.005 Abs at 1.0 Abs |
+0.010 Abs at 1.0 Abs
|Stray Light ||Less thn 0.1% Abs at 320 nm |
|Readability ||+ 1 Count |
|Data Readout ||Single Line LCD display |
|Key Board ||4 Keys, Soft touch membrane type |
|Painter Interface ||Printer interface for any printer |
|Serial Interface ||RS 232C interface |
|Light Source ||a) Tungsten Halogen Lamp |
b) Deuterium Lamp (D2)
|Detector ||Wide range Silicon Photodiode |
|Optics ||Complete mirror optics with resolution 1200 grooves/mm grating |
|Sample Holder ||4 position adjustable sample holder |
|Power ||230V + 10%, 50 Hz. AC |
|Dimensions ||420 x 350 x 240 mm (lxbxh) Approx. |
|Weight ||10 Kg (Approx.) |
|Technical Specifications |
|Wavelength ||195 to 1000nm |
|Spectral Bandwidth ||2 nm |
|Accuracy ||+ 0.5 nm |
|Repeatability ||+ 0.3 nm |
|Resolution ||0.1 nm |
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| Range 340 to 960 nm |
| Direct Concentration Facility |
| Latest Solid State IC Technology |
| Digital Display |
| Highly Stable and Accurate |
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|Range ||340 to 960 nm ||340 to 960 nm |
|Resolution ||0.1%T, 0.001 Abs ||0.1%T, 0.001 Abs |
|Output ||%T: 0 t0 100%, Abs; 0 to 1.999, Conc; 0 to 1999 ||%T: 0 t0 100%, Abs; 0 to 1.999, Conc; 0 to 1999 |
|Detector ||Silicon Photodiode ||Silicon Photodiode |
|Light Source ||6V, 1 Amp. Vertical Tungsten Halogen Lamp ||6V, 1 Amp. Vertical Tungsten Halogen Lamp |
|Monochromater ||600 Lines / mm grating ||600 Lines / mm grating |
|Path Length ||10 mm ||10 mm |
|Spectral Bandwidth ||10 mm ||10 mm |
|Wave Length Resolution ||5 nm ||1 nm |
|Wave Length Accuracy ||2.5 nm ||1 nm |
|Repeatability ||+2 nm ||+1 nm |
|Display ||3 1/2 digit LED Display ||3 1/2 digit LED Dual Display |
|Opeating Temp. ||5 to 45oC ||5 to 45oC |
|Power ||230V+ 10% AC 50 Hz ||230V+ 10% AC 50 Hz |
|Dimensions ||490 x 300 x 165 mm ||490 x 300 x 165 mm |
|Weight ||8.5 kg (approx.) ||8.5 kg (approx.) |
|Accessories ||Test Tubes(12mm dia) 10 nos |
We offer our customers a wide range of electronic instruments under the name PN Junction / Zener Diode. These are made available in both standard & customized specifications. Some of the features of these process and testing equipment used include:
- Microprocessor Trainer
- AC moving coil meters
- AC/DC Power Supply 0-50V/4Amp
- Application of Operational Amplifier
- Auto Karl Fischer Titrimeter
- Ballistic Galvanometer
- Basic Logic Gate using discrete components (7 in 1)
- Battery Eliminator
- Black & White Television Demonstrator with 14" CRT
- Color Television Demonstration with 20" CRT
- Conductivity Meters Microprocessor Based
- CRO Demonstrator 20 Mhz
- Digital Colony Counter
- Digital Dissolved Oxygen Meters
- Digital Filter Photo Calorimeter
- Digital Flame Photometer
- Digital HB Meter
- Digital pH meters
- Digital Spectrophotometer
- e/m by Thomson Method (Bar Magnet Method)
- FET Characteristics apparatus
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Sodium Lamp Transformer
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Power Supply AC/DC
Characteristics Apparatus (Forward & Reverse V-l Characteristics):
Objective: To study forward & reverse characteristics of PN Junction Diode and Zener Diode.
Instrument comprises of –
- Two DC power supplies
- Two round meters to measure voltage & current
- 1 PN Junction Diode
- 1 Zener Diode mounted behind panel with option of connections brought out at terminal /sockets
These also come with digital panel meters that provides in them optimum functionality.
Range provided by us include:
- Operational Amplifier Trainer with Digital Panel Meter
- Battery Charger 2-12 VDC/3 Amp
- 0-30 VDC/2 Amp
BH Curve Apparatus:
Objective: To trace Hysteresis curves on CRO using Capacitance, Resistance & Inductance
- Instrument comprises of AC Power Supply 3-15 VAC
- Output selectable using band switch
- Printed circuit diagram for BH curve
- Components connected behind the front panel
- Provision for connecting external inductance
- Input & output connections brought out at sockets
Resistance in Series & Parallel Apparatus:
Objective: To verify properties of resistances when connected in series & parallel.
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Study Of Half Wave / Full Wave & Bridge Rectifier Apparatus
Study of Half Wave/Full wave & Bridge Rectifier Apparatus with 3 Meters.
Objective: To study efficiency & Ripple factor in case of Half Wave, Full wave & Bridge rectifier on application of load & filters.
Features: Instrument comprises of AC Power Supply, 3 meters to measure Output Voltage & Output current, 4 PN Junction Diodes, Filter Circuit Kit, load Resistancces selectable using band switch.
Fully Solid state workable on 220 volts 50 Hz. All supplies are stabilized for accurate and stable operation. Single beam with a band width DC to 10 MHz. The accurate triggering of time base enable clear and stable display on screen 8x8 cm. Vertical deflection can be selected for either A.C. or D.C. provision or attenuation in the input circuit, calibrated from 5 mV to 50V/cm.
|Specifications : |
|Band width ||Vertical D.C. to 10 MHz (3db) |
|Sensitivity ||10mV/Cm Maximum |
|Input Impedance ||1 M Ohm. |
|Square wave calibration ||2 VP-P. |
|Triggering ||Internal fromverticalamplifier or external. |
|Sweep Time Factor ||0.1 us/Div. 0.1s/div. ±5%. |
|Horizontal Amplifier : |
|Band width ||DC to 1 MHz. |
|Display ||8x8 cm square |
|Power requirement ||25 Watt 230 V 50 Hz. |
|Dimension ||8"x5½"x11" |
Wein Bridge Oscillator using Operational Amplifier Transistor.
Objective: To study the Frequency and Wave shape generated by wein Bridge Osillator.
Feature: Instrument comprises of 12V DC Regulated Power Supply, Circuit diagram Printed & components mounted on front panel.
Objective: To study the Frequency and Wave shape generated by a Hartley Oscillator.
Features: Instrument comprises of 12V DC Regulated Power Supply, circuit diagram Printed & components mounted on front panel.
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Transistorised Wein Bridge Oscillator
Positive feedback in Wein-Bridge Oscillator is to use two stage RC coupled Amplifier. Since first stage of the RC-Coupled amplifier introduces a phase shift of 180 degree. Second stage introduces phase shift of 360 degree. Positive feedback network makes the input Vin and output Vout in the same phase. The frequency of oscillator.
In addition to the positive feedback the circuit is also provided with negative feedback to make the oscillations stable. Observe the output waveform on CRO. By varying the resistor R1 the frequency will change.
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Study Of Resistence In Parallel
To verify properties of resistance when connected in series & parallel. Instrument comprises of two moving coil meters to measure voltage & current, circuit diagram for series & parallel connections, Resistence mounted along with circuit diagram.
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Study Of Resistance In Series
To verify properties of resistance when connected in series & parallel. Instrument comprises of Tww moving coil meters to measure voltage & current, circuit diagram for series & parallel connections, Resistence mounted along with circuit diagram.