Student Diffraction Grating 15000 Lines per inch mounted in 60 MM x 45 MM in glass frame with inner window size 42 MM x 27 MM. Sealed with Black Tape. Apparatus required: Used with Spectrometer only. Package Contains:1. Diffraction Grating - 1 No.2. Box - PP/ABS - 1 No. 3. Certificate of Testing - 1 No.

Display Type: LCD Measuring Range: -10 °C to 50 °C Temperature Accuracy: ± 0.1 °C Humidity Range: 1% to 99% RH Humidity Accuracy: ± 5% RH Clock: 12/24 Hours Material: Plastic Power Source: 1 x 1.5 V (AAA)

Laser Grating 100 L P I mounted in 60 MM x 45 MM glass frame with inner window size 10 MM x 10 MM Sealed with Black Tape. Apparatus required: Used with Laser Pointer only.Package Contains:1. Diffraction Grating - 1 No.2. Box - PP/ABS - 1 No.

Laser Grating 250 L P I is mounted in 60 MM x 45 MM glass frame with inner size window 10 MM x 10 MM. Sealed with Black Tape. Apparatus required: Used with Laser Pointer only.Package Contains:1. Diffraction Grating - 1 No.2. Box - PP/ABS - 1 No.

Laser Grating 500 L P I is mounted in 60 MM x 45 MM glass frame with inner size window 10 MM x 10 MM. Sealed with Black Tape. Apparatus required: Used with Laser Pointer only.Package Contains:1. Diffraction Grating - 1 No.2. Box - PP/ABS - 1 No.

For demonstrating the principle of the diffraction grating and the way in which the properties are dependent upon the number of lines per unit length. Comprises a mask mount 90 x 30mm approximately with three 16 x 9mm apeture, each containing a diffraction grating replica. The gratings are of 100 lines/mm, 300 lines/mm and 600 lines/mm respectively and are protected by glass plates.Apparatus required: Used with Spectrometer only.

Mechanical Stopwatch made of metal body with single button used for Start, Stop & Reset. Features: High quality timing instrument. Packed in blue gift box. Silk smooth cloth in box which protects from scratches. Specifications: Resolution: 1/10 seconds. 30 seconds dial. Counts up-to 15 minutes. Single button: Only stops once, and it returns to zero with next push button Diameter: 60 MM

Conical Flask 250 ML Material: Borosilicate Glass Capacity: 250 ML Wall Thickness: 1.5 MM Graduation: With Color: Transparent

Diffraction Grating 600 Lines per MM is mounted in 50 MM x 50 MM glass frame with inner window size 36 MM x 24 MM. Sealed with Black Tape Apparatus required: Used with Spectrometer only.Package Contains:1. Diffraction Grating - 1 No.2. Box - PP/ABS - 1 No.

Taster T3 is the all-new economical TDS meter pen by HM Digital. This meter is great for domestic & office use. With T3 you get reliable results at an affordable price.

All time pieces are loaded with large timing range and high true-accuracy. These models have high-decibel sound and sport a very easy to use ergonomic button layout. All timers are supplied in premium & sturdy retail packing.                                            Timing Range: 99 hours, 59 minutes, 59 seconds Resolution: 0.01 second (count up), 1 second(count down) Features: Count Up & Count Down Compact Design Jumbo Digits Separate keys for easy operation Loud Sound Display Size: 50 x 24 mm Overall Dimensions: 76 x 57 x18 mm

Grating  For Laser 3-in-1 mounted in 90 MM x 30 MM glass frame with inner window size 10 MM x 10 MM.  Lines Per MM: 100 Lines per inch, 250 Lines per inch, 500 Lines per inch  Sealed with Black Tape. Apparatus required: Used with Laser Pointer only.Package Contains:1. Diffraction Grating - 1 No.2. Box - PP/ABS - 1 No.

Measuring Range -50~70 C/-58~158°F RH: 10~99% Resolution 0.1°C / 1%RH Accuracy ±1°C / 5%RH Power Source °C & °F unit selectable Max/Min Reading 12/24HR Clock Reset Memory Power Source 1 x 1.5v (AAA)

The Battery Eliminator is designed to be safe & reliable source of low voltage, DC power use in class rooms. It is comprised of a heavy duty transformer with copper wire for better durability of product. It allows teachers to conduct experiments requiring a variety of direct voltages while avoiding the decreased characteristics of dry cell.

Digital pH Meter FEATURES: Compact & Light Weight. Digital-Microprocessor based design Temperature Sensing & Temperature compensation Temperature knob Manual 4 & 7 pH calibration.

This is a robust instrument designed specifically for student use, which nevertheless is capable of very high performance. The main structure is of heavy cast metal, with bright plated fittings. The complete instrument is supplied with polished wooden case.Scale: The 150mm diameter circle with protective plastic shield is fixed to the telescope movement and the table is attached to the double ended vernier, which reads to 1 minute of arc. Both telescope and table rotation fine adjustment screws, and release of a clamping screw enables adjustment of both movements to bemade by hand.Collimator: Mounted on fixed and fitted with 178mm focus achromatic objectives, 25mm clear aperture. Also fitted is a unilaterally adjustable slit7mmlong.Telescope: Mounted on moveable pillar and fitted with 178mm Focus achromatic objective, 25mm clear aperture. Also fitted is a x8 Ramsden eyepiece and a glass cross line graticule. Both the telescope and collimator have rack and pinion focusing. Means are provided for leveling the axis of both optical units and for squaring them to axis ofrotation.Prism Table: The table is marked with lines to assist placing the prism with respect to the table leveling screws.

Specifications: 1/100 second resolution in the first 30 minutes & 1 second from the 31st minute Daily alarm with snooze Hourly chime on/off function Water resistant Time in 12/ 24-hr format selectable With lanyard for easy carrying 1 x 1.5v Lithium Battery

P N Junction Diode Characteristics Apparatus has been designed to plot forward and reverse bias Characteristics of P N Junction Diode. The instrument comprises if the following builtin parts: 1. Two continuously variable DC Regulated power supplies of 0-30Volts & 0-3Volts Specifications of Regulated Power Supply: Input Voltage : 230V ± 10% AC, 50 Hz Load Regulation : ±0.2% Line Regulation: ±0.05% Ripple: Less than 3mV R.M.S. Protection against Short Circuit & Overload 2. Two meters to measure voltage & current are provided on the front panel with connections brought out on sockets / terminals. 3. Two P N Diodes are mounted inside the cabinet with connections brought out on sockets to plot the forward and reverse bias characteristics.

Zener Diode Characteristics Apparatus has been designed to study Forward and Reverse Bias Characteristics of a Zener Diode. The instrument comprises if the following builtin parts: 1. One continuously variable DC Regulated Power Supply of 0-15V with output brought out at 4mm sockets. 2. Two meters to measure voltage & current are mounted on the front panel & connections brought out at 4mm sockets / terminals. 3. One series Resistance & three Zener Diodes (3.3, 6.2, 9.1V) has been provided on the front panel with connections brought out at 4mm sockets.

Travelling Microscope designed to meet the requirements of Research, Colleges, Schools and Industrial laboratories. They are used for accurate measurement of the diameters of different objects. They are also used in Physics Laboratories for more accurate determination of small variation in the liquid levels, manometers, the refractive index of liquids as well as in surface tension & viscosity experiments. Travelling Microscope is extensively used in Research, Colleges, Schools and Industrial laboratories for accurate measurement of the diameters of different objects. Technical Specification Base : Iron Scale : Aluminum Graduated Piller : Aluminium Eyepiece : 10X (Ramsden) Vertical Scale : Main Scale : 0-150mm Vernier Scale  0-1mm Least Count : 0.01mm Horizontal Scale Main Scale : 0-180mm Vernier Scale : 0-1 mm Least Count : 0.01mm