Complete English version along with English instructions - If you want to save money significantly on the maintenance of your own car, it's time to buy OKTIS-2. This device will give you a tremendous help in a case if you began to use the service of car service center more often by reason of using low-quality gasoline. Also, it will help greatly to reduce fuel consumption. - With this device you can go to any filling station, that suits you and be sure, that you won?t mistake with a choice of high-quality gasoline. It is especially convenient in a period of summer trips. But if you trust only one of any filling stations, remember, that gasoline?s quality can change even there, and OKTIS-2 will help you find it out. - With a help of OKTIS-2 device you can define the value of gasoline octane number on a filling station directly. Device reflects its true value warning a car owner this way about the presence of chemical octane-enhancing additives in fuel grades AI-80, AI-92, AI-95, AI-98. Thus, you prevent engine malfunctions, which can be caused by low-quality fuel with harmful additive (for example, naphthalene, lead compounds, ethyl alcohol, acetone). - Octan number is measured quickly ? you can know it, filling the car tank at the filling station through the device measuring tube by the flow method or in stationary conditions by immersion method, if you don?t have an opportunity to order a professional expertise. And for obtaining a result, OKTIS-2 uses minimum amount of a fuel. - OKTIS-2 is unique Russian development, you can calibrate it to any specific region. It is rather compact and lightweight, its weight is 400 grams only and due to it it is very convenient to take it with you. Moreover, it doesn?t need service maintenance. This device works on the fuel analysis research methods basis and defines gasoline?s permittivity level, which influences the value of octane number. Device is highly sensitive: it recognizes gasoline both low quality with minimum value of octane number 75 and luxury with a value of octane number 99,9. Using flow method with measuring tube, you will be satisfied with 15 seconds to prepare device to usage and with 5 seconds to receive a result. For that aim you will need 5-10 litre of fuel. And in stationary conditions by using immersion method, you will need only 80 ml of gasoline. When gasoline hits the sensor element in the tube, parameters of this element are changed and microprocessor compares them with data, fixed in memory, and values of gasoline?s octane number appear on the digital display. Unified device design includes three main nodes: compartment with electrical part and transition compartment with o-rings in the corpus, and also, measurement tube with sensitive element. Transition compartment and measurement tube form a channel, in which gasoline is located or flowing. And digital display and batteries are located in compartment with electrical part. All the equipment is simple and clear. The package does not include AA batteries because shipping batteries is prohibited by international airlines.