☆Pendulum angle: 5o-15o.
☆Photoelectric door timing device, timing times: 0-99;
☆Timing range: 0~100s, precision: 1ms, LED display;
☆Diameter of twist wire: d=0.5mm; quality of twist circular ring; M=550g (about);
☆The instrument consists of support, millisecond meter, and counter;
☆FB210 (single pole type): stainless steel vertical rod and disc adopt aluminium alloy materials;
☆FB210 (portal frame type): rack and disc adopt steel materials.