Control panel with modular design, fully functional, simple structure, convenient operation. Can be widely used in petroleum, chemical, pharmaceutical, transportation, food to be industrial and commercial. Setting units of measurement: In the standby mode, or raise the amount of current display state Press CAL + RESET button for 5 seconds Enter unit conversion settings, press the RESET button Followed by LTR → GAL → PT → QT → LTR choose the unit of measurement, While the cumulative filling volume displayed in the current unit of measure conversion after Press the MENU key for 3 seconds to exit the unit conversion settings. Note: This product requires 2 AAA batteries, more convenient to use, this product comes with 2 AAA battery replaceable battery Low Battery Tips When the battery voltage is 2.2V to 2.4V, display LBat, to remind the user to replace the battery. Color: Material: plastic Specifications: Model: K24 Media: methanol fuel chemical liquid urea water Importers: 1 inch internal thread Measurement accuracy: ± 1% Repeatability: ± 0.5% Maximum working pressure: 5BAR Operating voltage: 2.3-3.3V Flow range: 10-90L / MIN Single count: 0.00-9999.9 The total cumulative number: 0.00-999999.9 Unit: L / L, gal / GAL, pint / , quart / Single measurement cleared: RESET Package Contents: 1 x K24 Turbine Digital Fuel Flow Meter Only the above package content, other products are not included. Note: Light reflection 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.