Known arterial osteollographic instruments are a tripod, a cuff, a differential capsule choke, a compressed air cylinder, a compressor, a tape drive mechanism. The proposed oscilloscope is distinguished by the fact that it has a pneumatic regulator and an example of a reducer with a standard connection, as well as mechanisms that ensure a constant compression rate and a synchronous speed of moving the paper to record the change in arteries pressure. Such an oscilloscope allows stable blood pressure measurement results to be obtained. In order to reduce friction forces, bent deformations and other distortions that lower the measurement accuracy, the proposed oscilloscope establishes a direct connection (with pinnacle or thin rod) between the membrane of the differential capsule and the regulator body with a pneumatic amplifier gate. The drawing shows a schematic diagram of the proposed oscilloscope. The cuff 1 is connected by an air duct with a differential capsule 2, the chambers of which are connected by a choke 3. Due to this connection of the chambers, the capsule membrane is deformed in proportion to the rate of change of pressure (volume) of the pulsating artery of the limb squeezed by the cuff. With the help of a pneumatic regulator 4, issued in the form of a reducer with feedback, the compression pressure in the cuff and the differential capsule is slowly changed linearly in time. A constant compression rate — pressure change — is created by a choke 5, on which an initial pressure drop is provided by means of a spring 6, which is then maintained continuously through feedback through the choke 5 between the setting and adjustable chambers 7 and 8 of the regulator. The constant pressure drop creates a constant flow through the choke 5, which fills the constant-setting regulator chamber of the regulator, which creates linearity of the pressure change over time in the adjustable chamber 8. The air flow through the pressure regulator enters the atmosphere through the differential port 9 capsule 2, which is used simultaneously to transmit movement from the membrane 10 of the capsule to the regulator, for example the flap 11 of the pneumatic amplifier 12, by means of a yarn thinner rod 13. Thus, when deformed x membrane due to pressure fluctuations in the cuff 1 at a pulsation constricted artery cuff movement without friction and transmitted to the damping valve 11. Since the diaphragm moves correspondingly the rate of change of pressure in the cuff flap will perform motion also proportional pressure change rate. This changes the gap between the flap to the nozzle 14 of the pneumatic amplifier 12, whereby the flow rate of air through the amplifier 12 changes, which leads to a change in pressure in its chamber to the associated manometric box 15 of the recorder. The deformation of the skeleton is transmitted by a string or thread of the holder 16 of the pen 17, which traces the arterial division change onto the moving boom 18. The pressure at the inlet to the pneumatic amplifier is stabilized by a pneumatic regulator (gearbox) 19. Compressed air is supplied to the cylinder 20 from the compressor 21. When the pressure in the cylinder 20 is adjusted to a certain value, the valve 22 opens and the air enters at the inputs of the regulators 4 and 19, compression occurs, i.e. uniform increase in pressure in the pneumo system. At the same time, the air supply of the amplifier 12 is provided. At the same time with the air supply to the system, the toggle mechanism 23 is triggered by a tape drive mechanism 24, 6d driven by an electric motor 25. Since the pressure measurement speed in the pneumatic system and the speed of paper movement 18 by the tape drive mechanism are constant paper will indicate the amount of blood pressure. . The power of the motor of the tape mechanism and the compressor is provided from block 26. Claim 1. Arterial oscilloscope containing a tripod, cuff, differential capsule, choke, compressed air cylinder, compressor, tape mechanism, characterized in that, in order to obtain stable blood pressure measurement results, a pneumatic regulator is installed in it, for example a reducer with feedback, as well as mechanisms ensuring a constant compression rate (pressure change in m nzhete) and the synchronous speed of movement of the paper for recording of arterial pressure curve.