Transducer Subcategory_Tamper Evident Bags and the product design features

and the product design features a walkway illumination mode when used in combination with your devices' flashlight

supplied with steel keepers and a cardboard storage box for sustained field strength between hands-on experiments

Pink-dotted ends and steel keepers across this 50 x 12mm Alnico cylinder pair simplify pole identification while the keepers preserve field strength during cardboard-box storage

sized for individual student-lab use in simple-machines units

Four 153 x 76mm plates - each holding 98 iron-rod plotting compasses in a 14 x 7 matrix - assemble flat or as the faces of a cube to display 2D and 3D field-line patterns

Transducer Subcategory_Tamper Evident Bags and the product design featuresSimilar to the transmitter and receiver, but containing only a transducer cell. Designed to be connected in parallel. Similar to the transmitter and receiver, but containing only a transducer cell. Designed to be connected in parallel with the output from the internal oscillator of the main transmitter to produce an identical output allowing experiments in double point source interference, etc. to be carried out.