Miscellaneous
Digital USB Microscope
Digital USB MicroscopeUSB powered digital 10 – 200x stage or hand held microscope.
Discharge Sphere
Discharge SphereSupported on a Lucite column with a cast iron base. Includes cabling for connection to the High Voltage Van de Graaff Generator or to ground.
Discover Density Set
Discover Density SetA set of 22 separate pieces allow students to discover the relationship between density, volume, and dimensions.
Discover Freefall System
Discover Freefall SystemWith a magnetic release and a Time of Flight pad this system minimizes human error and allows detailed investigation of air resistance and gravity.
Discover Pi Set (10 pack)
Discover Pi Set (10 pack)This 10-pack of disc sets allows students to derive the meaning of pi directly from their measurements. Four plastic disks with varying diameter in each set.
Dissectible Leyden Jar
Dissectible Leyden JarThis Leyden Jar is designed for classroom demonstrations and comes with a durable inner and outer plate, a plastic dielectric, and instructions.
Dissolved CO₂ Waterproof Sleeve
Dissolved CO₂ Waterproof SleeveThe Wireless CO₂ Sensor can be equipped for aqueous measurements using this semipermeable sleeve.
Includes; 5 x sleeves & 5 x O-rings
Double Rod Clamp (3 pack)
Double Rod Clamp (3 pack)Clamp holds two rods either parallel or perpendicular to one another.
Double-Length Slinky
Double-Length SlinkyAn excellent tool for demonstrating transverse and longitudinal wave phenomena. It is twice as long as a traditional slinky.
Driven Damped Cart Oscillations
Driven Damped Cart OscillationsThe oscillator consists of a Smart Cart attached to two springs.
Drop Dispenser
Drop DispenserThis Drop Dispenser has a 60 mL reservoir and two stopcocks to facilitate titrations.
Drop-Shoot Demo
Drop-Shoot DemoReleasing the spring causes one ball to drop directly down while the other is projected horizontally.
Dropper Popper
Dropper PopperInvert this half rubber ball and drop it. It will bounce up higher than the release point. Discuss conservation of energy with your students.
Dual Colour Laser
Dual Colour LaserThe Lascells semiconductor laser contains two independently controlled laser diodes, one at the standard 650nm red and a second at 532nm green. Both lasers may be simultaneously passed through a double slit slide and both diffraction patterns may be displayed one above the other for an immediate comparison.
DualScope
DualScopeRobust low-priced hobby/student microscope with simple optical glass objectives mounted on a revolving nosepiece. It comes with a plastic vertical stage with stage clips and a 6-hole disc condenser.
The eyetube is mounted at a 45 degree angle for comfortable viewing and has a wide-field eyepiece with built-in pointer. In addition to the traditional bottom light the microscope is provided with a top light, and is thus also suited for observation of surfaces of leaves, coins, insects etc.
A simple microscope ideal for hobby use and for smaller children. The simplicity of the design makes it a good choice as an introduction to microscopes or as a supplement to the traditional school microscopes.
Dust cover
Dust coverUnit: Pcs
Dust Cover, large
Dust Cover, largeUnit: Pcs
e/m Apparatus
e/m ApparatusPerform accurate measurements of the charge-to-mass ratio of the electron. Includes power supplies which can also be used in other experiments.
Earth Neutral Live Demo
Earth Neutral Live DemoThis apparatus is an effective demonstration of how the earth wire and fuse act together to protect both the user and the appliance.
Economy Coils, Primary and Secondary
Economy Coils, Primary and SecondaryA low cost option for investigating electromagnetic induction and transformer principles.
