ELING Waterproof 52mm Dial RPM Rev Counter 0~9990RPM with Hour Meter 9~32V with Red Backlight for Car Boat

-Be suitable for all kinds of tacho RPM , and display the rotation speed of the engine-Use moving- prince to drive the , featuring good ennce and anti-ion-IP67 waterproof and dustproof grade-Ster motors used for full range of sting s, great feature with its le power consumption, longer life, higher precision, etc.-With curved gla (with anti-foing function)-With ul-wide working voltage design( long-term operating voltage: 9-32V, Maximum up to: 36V (≤ 1 min))-Fixing dimension: 52mm (2")-Indicating Range: 0-9990RPM-Speed Ratio: 1-300 adjustable-Working Voltage: 9-32V(12V/24V)-Backlight: Red-Functions: current tacho/RPM and hour-Operation mode: LCD display, ster motor1x 1x Multi-plug socket1x Installation InstructionBe used for gear rotation speed measurementCombining the advantages of stable signal, wide range of operating temperature, small size, simple aembly, etc.It covers a wide range of measurement, and it is able to measure the zero-rotation speed-M16*1.5 (2-wires)Operating temperature: -40 ~85℃Output signal: sine waveSignal duty factor: 47±5%Inductance distance: le than 1mmTooth module: 2~6Connecting way: two wiresProtection rank: IP65Length: L=100MM L1=80MM-M16*1.5/M18*1.5 Holzer Tacho (3-wires)Operating temperature: -40 ~85℃Output signal: square waveInductance distance: le than 2mmOperating voltage: 8~32V withpolarity protectionConnecting way: three wiresProtection rank: IP65Length: L=80MM L1=70 / L=80MM L1=60MMM18*1.5   M16*1.5Operating Temperature: -40 to 85℃Output Signal: Sine WaveSignal Duty Factor: 47±5%Inductance Distance: Le than 1mmTooth Module: 2~6Connecting Way: Two Terminals connection