DIGITEN 4 Digital Green LED Tachometer RPM Speed Meter+Hall Proximity Switch Sensor NPN

Power requirement:DC 8-15V Measure range : 5-9999RPM.Clear zero: Automatic.Clear zero time: about 10s.the greater the RPM value,the longer the clear zero time.Refresh frequency: 0.2-0.5S@120-1200RPM,0.25-0.06S@2400-9999RPM.Measure accuracy: RPM<5000,±2,RPM>5000,±3.Display: Green 0.56 inch LED Sign: Pusle signal,Hall NPN 3 wires normally open.Hall proximity model: NJK-5002C Appearance: M12mm cylinder.Detection range: 1-5mm Proximity output current: 200mA Detected objects: magnet Response frequency: 100HZ Tachometer dimension:72x36x20mm,panel cutout Dimension:68x33mm.Sensor dimention: M12x10x55mm.Sensor wiring:brown-Power+,blue-Power-,black-signal.Operating temperature: 0 to 50°C.Packaging include Tachometer x 1 Hall NPN proximity sensor x 1 '