Demonstration Meter, Interchangeable Scale

Ideal for class-room or group demonstration. Moving coil type, 30´15´30cm, with spring control and magnetic damping. Basic movement of meter calibrated to 5mA, 100mV. Long, pointer needle, with thick arrow-head for clear visibility from a distance, moves on hardened and polished steel pivots and jeweled bearings. Mounted in sturdy, plastic frame with transparent front & back windows. One side of frame has color-coded, 4mm socket terminals for electrical connection, and a slot for inserting or removing scales; other side has zero-adjustment knob, and knob for locking pointer needle. Interchangeable scales of different ranges (center zero as well as left zero) for measuring AC & DC voltage and current values. Scales are printed on both sides facilitating group observation. Complete plastic body.