DROK® 0.56”Red LED Display Digital Tally Counter 0-9999 Up Down Counter Totalizer Electronic Counter with Magnetic Induction Switch DC5V;

Technical parameters:
Input pulse signal: open NPN / PNP collector contact switches, non-contact switch, limit switch, level pulse and so on.
Input signal voltage: High level H = 4 ~ 30V, low level L = 0 ~ 0.6V, falling edge trigger
Measuring range: 0 to 9999 cumulative count
Count input frequency: less than 2000Hz
Display: 0.56"high brightness LED
Power supply: DC 5V ± 10%; ＜ 80mA
Working temperature: -10 ~ 60 °c (relative humidity of 80% or less)
Dimensions: 79 x 43 x 25mm
Mounting Hole Size: 75 x 39.5mm

Using:
Move the magnet close to the magnetic proximity switch about 0.5-1 cm, then take the magnet away from the magnetic proximity switch for a certain distance (typically 3-5 cm or more). Then the product start counting and screen display add 1 per repeated movement.
The counter should works on recurring machine, such as counting the up and down movement of punch, counting the circles of flywheel.

Note:
1, the count signal and reset signal input switching should closer to the counter terminal.
2, to avoid unnecessary interference, if necessary, please use shielded cable, shield connected to the count terminal "+".
3, recommended to use magnetic switch.