Abstract: A method for determining a value of an environment variable using raw data from an energetically essentially passive remote-access apparatus. A value of a first measurable quantity indicative of the environment variable is obtained from the raw data. The value of the environment variable is determined using calibration data and the value of the first measurable quantity. The accuracy is enhanced by measuring the value of the measurable quantity with a measuring signal of which strength is regulated or by obtaining a value of a second measurable quantity. The second measurable quantity is indicative of the environment variable or measurement conditions of the first measurable quantity. A method for forming calibration data for the measurements. RFID reader devices arranged to carry out the methods and energetically essentially passive remote-access apparatuses for the methods. A database that may be used with the method and a computer product including the database.

Abstract: A method for determining a value of an environment variable using raw data from an energetically essentially passive remote-access apparatus. A value of a first measurable quantity indicative of the environment variable is obtained from the raw data. The value of the environment variable is determined using calibration data and the value of the first measurable quantity. The accuracy is enhanced by measuring the value of the measurable quantity with a measuring signal of which strength is regulated or by obtaining a value of a second measurable quantity. The second measurable quantity is indicative of the environment variable or measurement conditions of the first measurable quantity. A method for forming calibration data for the measurements. RFID reader devices arranged to carry out the methods and energetically essentially passive remote-access apparatuses for the methods. A database that may be used with the method and a computer product including the database.

Abstract: The invention relates to method for imaging measurement of a moving or flowing target and to an imaging measuring device for implementing the aforementioned method. Moreover, the invention relates to the use of information measured by means of imaging measurement in the control and/or adjustment of a process. According to the invention, electromagnetic radiation obtained from the moving or flowing target (T) is focused by means of imaging optics to produce an image to the screen of a two-dimensional matrix detector at least via a first and a second filter (F1, F2) which transmit electromagnetic radiation in manners differing from each other. Said at least first and second filter form on the screen of the detector at least a first and a second filter area (FR1, R2) that partly cover the light-sensitive area (DA) of the detector.

Abstract: The invention relates to method for imaging measurement of a moving or flowing target and to an imaging measuring device for implementing the aforementioned method. Moreover, the invention relates to the use of information measured by means of imaging measurement in the control and/or adjustment of a process. According to the invention, electromagnetic radiation obtained from the moving or flowing target (T) is focused by means of imaging optics to produce an image to the screen of a two-dimensional matrix detector at least via a first and a second filter (F1, F2) which transmit electromagnetic radiation in manners differing from each other. Said at least first and second filter form on the screen of the detector at least a first and a second filter area (FR1, R2) that partly cover the light-sensitive area (DA) of the detector.