US$ 199.00
25 x 2 x 1 inches with a sliding top
Selected through four rotary-switch decades from 0 to 11
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
and a motor accessory
Tangent Galvanometer for Magnetic Field Measurement Subcategory_Botany Models 25 x 2 x 1Tangent 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.
US$ 199.00
US$ 169.00
US$ 12.49
US$ 42.85
US$ 810.00