the band is arranged to go through between them whereby the desired signals can be transferred to the sensors in the most efficient manner possible when the parts 50 60 and 70 of the sensor arrangement are connected to one another the sensors 61 and 71 are coupled to the electronic circuitry and accumulator 51 of the part 50 by means of a connector 72 on the bottom of the pocket of the part 70 and a matching connector on the bottom of the part 50 by means of a radio transmitter 53 the signals collected with the sensor arrangement are transmitted forwards as described in the above in connection with fig1 to 4 the sensor arrangement structure as described in the above results primarily from the fact that a part of it i e the band and the parts 60 and 70 in direct contact therewith can be implemented with good reason patient specifically i e they can be readily discarded whereas the part 50 incorporating more expensive components can be used several times consequently the part 50 is to be implemented substantially sealed and disinfectable fig9 shows an example in principle of a combined signal spectrum produced by means of the apparatus of the invention in the example information on the vital functions and body movements of a human being has been received from the sensor arrangement and by analysing this signal from the sensor arrangement it can be presented by means of amplitude and frequency values relating to one another as in fig9 if these values are collected constantly or at successive moments the time dimension can be combined to these values and a three dimensional model such as the one in fig9 is achieved.