Oil Pressure Gauge Specification: 1. Working voltage: 9-35v; 2. Test range: 0-1.00Mpa; 3. When the Oil Pressure is 0.08Mpa,Gauge will flash for alarm . 4.Oil Pressure Sensor :1/8NPT Sensor 5. The red wire is connected to the positive pole of the power supply, and the black wire is connected to the negative pole of the power supply Package Include : 1 X 52MM Oil Pressure Gauge 1 X 1/8NPT Oil Pressure Sensor (Option) Water Temp Gauge Specification: Specification: -52mm Water Temperature Gauge -Working Voltage :9-35V -Range:0-120 -Alarm Temperature :96 (The Gauge Flash Alarm ) -Water Temp Sensor size :1/8NPT -Connection: Red Wire-------------Power (+) Black Wire ----------Power(-) Package Include : 1 X 52MM Water Temp Gauge 1 X 1/8NPT Water Temp Sensor Fuel Level Gauge Specification: 1. Working voltage: 9-35V; 2. Test range: 0-100%; 3. When the Fuel Level is 10%, the Gauge will flash for alarm; 4. Resistance value of adaptive sensor: 0-190 ; 5. The RED wire is connected to the positive pole of the power supply, the BLACK wire is connected to the negative pole of the power supply, and the GREEN wire is connected to the sensor. Package Include: 1X 52MM Fuel Level Gauge Voltmeter Specification: 1. Working voltage: 9-35v; 2. Test range: 9-35v; 3. When the voltage value is 10V or between 14.5 and 21.5v or 29V, the Gauge will flash for alarm; 4. The red wire is connected to the positive pole of the power supply, and the black wire is connected to the negative pole of the power supply Package Include: 1 X 52mm Voltage