Light-Dependent Resistor (LDR) Unit Subcategory_Filtration Equipment supported on die-cast ends with

supported on die-cast ends with a phosphor-bronze sliding contact

anchoring side-by-side magnet-strength comparisons for the classroom

Barlow's Wheel apparatus with neodymium magnets and a heavy base

teaching a whole classroom the principles of vernier-scale reading before students use benchtop-sized calipers

sized for precision-resistor and thermocouple work where stable resistance matters

Light-Dependent Resistor (LDR) Unit Subcategory_Filtration Equipment supported on die-cast ends withUsed to introduce photoconductivity and light controlled circuits, this LDR drops resistance dramatically when light strikes the cell, contrasting with the dark state high resistance reading.