LYWS 4 Digital Green LED Tachometer RPM Speed Meter+NPN Hall Proximity Switch Sensor w/ Black Shell

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 while 120-1200RPM;0.25-0.06S while 2400-9999RPM.
Measure indication:RPM<5000,±2;RPM>5000,±3.
Display:RED 0.56" LED
Sign:Pusle signal,Hall NPN 3 wires normally open.
Hall proximity model:NJK-5002C
Appearance:M12mm cylinder.
Detection range: 10mm
Proximity output current: 200mA
Detected objects: magnet
Response frequency: 100HZ
Tachometer dimension:72x36x20mm,panel cutout Dimension:68x33mm.
Sensor dimention: M12x10x55mm.
Wiring:
(Sensor's Brown + Meter's Red) + Power Positive.
(Sensor's Blue + Meter's Black) + Power Negative.
(Sensor's Black + Meter's Yellow) = Signal terminal.
Operating temperature: 0 to 50°C.
Packaging include：
1x Tachometer
1x Hall NPN proximity sensor w/ magnet