2 In 1 Air Fuel Ratio Gauge Voltmeter 12v 52mm Digital Afr Volt Meter

Working Voltage: DC12VSignal Line Voltage: 0-1VSpiral: M18 x 1.5Use Wrench: 22mmOutput Voltage: Maximum value greater than equal 900mv/ minimum value less than equal 50mv.How to Connect the Gauge to Sensor:The white line is at heater abBlack line signal line C, gray line signal ground DThe green wire of the instrument is connected with the black wire of the sensor. The gray line is connected to the negative pole of the battery.One white wire connect with the car shell or battery negative pole.Another white wire connect to the ACC line of ignition switchThe white line is the heater and does not distinguish between positive and negative electrodesResponse time: (600mV-300mV) less than equal 100ms.Response time: (300mV -600mV) less than equal 100ms.Starting time: less than equal 10sHeating resistance: 8.5-9.5ohmInternal resistance: 200-300ohmcolour:Black+whiteMaterial:plasticPackage Contents:1 x Air Fuel Ratio Gauge1 x Cable1 x O2 Oxygen Sensor1 x English manualOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.