لا توجد منتجات في سلة المشتريات.
عرض 1456–1470 من أصل 1963 نتيجة
Power Supply E.H.T
A floating, high voltage power source useful for supplying charge for quantitative electrostatic experiments, gas discharge tubes needing a filament supply and spectrum tubes. Continuously variable output up to 5kV. 6V/1A AC or 12V/0.5A AC filament heating supply, insulated for EHT Voltages. Arotary control knob provided on the front panel adjusts the EHT output. Non hazardous maximum load capacity of 3mA (short circuit current). Analog moving coil meter. All outputs via clearly marked 4mm shielded sockets. Both input and output fuse protected. Aluminium extrusion case with insulated plastic side supports Indicator type ON/OFF switch. Supplied complete with detachable mains lead.
SKU: PH62053Power Supply, 2 V
For Westminster Electromagnetic Kit giving 1 V full wave rectified DC and 1 V / 2 V AC outputs at 8 A max. The circuit diagram is printed on the top panel which also carries mains switch, light indicator and output sockets for DC and AC With 1.5 meter mains detachable cable.
SKU: PH50163Power Supply, Continously Variable, 25V
Gives continuously variable A.C. and D.C. outputs up to 10 Afor A. C. and 8 A for D. C. A meter is provided to indicate both A. C. and D. C. voltages. An internal fuse is provided for input and a resettable cut-out for output. With detachable 1.5 meter mains lead.
Mains input: 220-240 V AC 50/60 Hz.
Output Voltages: 0 to 25 V AC and full wave rectified DC.
Output Current: 10 A AC, 8 A DC.
Voltage Selection: Rotary continuously variable transformer operated by a large knob on front panel.
Display Meter: AC and DC output voltages by a moving coil meter with selector switch to select AC or DC.
Circuit Protection: Mains input 3 A internal glass fuse link. Output is protected by a resettable cut-out.
Output Terminals: Colour coded 4 mm sockets.SKU: PH61015Precision Rotary Microtome
A fully dependable sectioning equipment designed for precise sectioning of tissues up to 1 micron thickness. It has a front located feed indicator with cam drive system for accurate feed setting from 1 to 50 microns in steps of 1 micron. Prominent features include independent feed mechanism with automatic safety device, universal knife holder with lateral movement to permit use of entire knife edge, ball and flange type object holder for accurate centering of the specimen and full swing protective cover for easy cleaning and lubrication. The equipment assures smooth operation throughout the long life of the instrument as individual components are manufactured with modern techniques. The microtome razor is fabricated from fine grain steel alloy tested for microstructure and is heat treated to maintain its sharpness and strength. Supplied complete with one razor 120 mm with back and handle, a set of three object holders, one honing plate, oil can, dust cover, in wooden cabinet.
SKU: B10575Primary And Secondary Coil
The apparatus demonstrates the principle of Electromagnetic Induction and helps explain the concept of a transformer. Primary and Secondary coil consist of coils mounted on plastic spools, with 2 binding posts on each coil. You can slide the primary coil inside the secondary coil. Also includes a soft iron core for induction experiments. Primary coil has 480 turns while secondary coil has 3800 turns. Requires a galvanometer and bar magnets, not supplied with apparatus.
SKU: PH50250Primary And Secondary Coils
To demonstrate electromagnetic induction and transformer principles. Primary coil with 175 turns, secondary coil with three different windings 500; 1,000 and 1,500 turns. Coils are wound on molded pipe and are provided with 4 mm safety sockets. With Plated Iron core.
SKU: PH50252Primary Electricity Kits
Primary Electricity Kits are designed to teach students the basic concepts for electricity. The various individual components are mounted on stable, robust plastic bases. Each component is with two 4 mm diameter sockets.Students can perform a variety of experiments by connecting these individual components in a circuit via 4 mm stackable connecting leads. Kit A is for a group of 6 students, while Kit B contains additional components that can be issued by teacher as required. Only one Kit B is sufficient for a class of 30 students. Includes instruction manual.
SKU: PH50805Projection Microscope
A greatly enlarged image of the specimen slide is projected on the screen, providing a high contrast, sharp and distortion free image. The microscope is highly suitable for group discussions as well as for teaching purposes.
General Features
* Stable and robust stand.
* Monocular fixed straight tube body. Mechanical tube length 160 mm.
* Separate knobs for coarse and fine focussing.
* Fixed square stage 110 x 110 mm with graduated detachable mechanical stage.
* Triple revolving nose-piece with click stops and positive centering.
* Fixed built-in Abbe condenser NA 0.65.
* Illumination by 6V 20 W halogen lamp with solid state variable light control knob for adjusting the intensity.
* Grainless, optically true circular glass projection screen rotatable through 360° on microscope tube.Optics
Eyepiece : Huygenian x10.
Objectives : Achromatic: x5, x10, x20.SKU: B10432Projection Microscope
A greatly enlarged image of the specimen slide is projected on the screen, providing a high contrast, sharp and distortion free image. The microscope is highly suitable for group discussions as well as for teaching purposes.
General Features:
* Stable and robust stand.
* Monocular fixed straight tube body. Mechanical tube length 160 mm.
* Separate knobs for coarse and fine focussing.
* Fixed square stage 110 x 110 mm with graduated detachable mechanical stage.
* Triple revolving nose-piece with click stops and positive centering.
* Fixed built-in Abbe condenser NA 0.65.
* Illumination by 6V 20 W halogen lamp with solid state variable light control knob for adjusting the intensity.
* Grainless, optically true circular glass projection screen rotatable through 360° on microscope tube.Optics
Eyepiece : Huygenian x10.
Objectives : Achromatic: x5, x10, x20.SKU: B10434
