Tangent Galvanometer for Magnetic Field Measurement Subcategory_Botany Models Supplied as the seven most

Supplied as the seven most common classroom sizes

Larger 100 x 12 x 15mm Alnico horseshoe steps the pole-gap geometry up from the 75mm model

and pyloric regions with internal rugae

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

or batteries required

Tangent Galvanometer for Magnetic Field Measurement Subcategory_Botany Models Supplied as the seven mostTangent galvanometer instrument that derives current absolutely from compass needle deflection against Earth's horizontal field, the basis for classic determinations of the local BH constant.