Radiometric measuring arrangement for measuring and/or monitoring a measured variable, especially a fill level or a density, of a fill substance located in a container and a method executable therewith for detection of accretion formation in the container. The variable to be measured is measured by means of a measuring system, which during operation sends radioactive radiation along a measuring path through the container, and measures radiation intensity emerging from the container along the measuring path, and by means of a comparison measuring system, which sends radioactive radiation along a comparison path through the container and measures radiation intensity emerging from the container along the comparison path. The comparison path extends in such a manner through the container that in the case of the presence of an accretion layer on the inner walls of the container a ratio of a sum of the two segments of the measuring path extending through the accretion layer to the length of an additional segment of the measuring path (A, A) extending between these two segments is different from the ratio formed in the same manner for the comparison path, and an accretion formation occurring in ongoing operation is detected based on deviations ascertained in ongoing operation between the measurement results of the measuring system and the measurement results of the comparison measuring system.

A module system for a radiometric measuring device includes a basic module having a sensor arrangement designed to generate a measurement signal on the basis of radiation which strikes the sensor arrangement, a signal evaluation unit electrically coupled to the sensor arrangement and being designed to determine a measurement variable on the basis of the measurement signal, a control device interface, wherein the basic module is coupleable to at least one control device by the control device interface for interchanging data, the basic module being supplied with electrical energy solely via its control device interface in a basic operating state, and an expansion module interface. The module system further includes an expansion module which is separate from the basic module and has a basic module interface, the basic module interface being able to be coupled to the expansion module interface for interchanging data, interchanging energy, and/or interchanging measurement signals, a number of functional groups, and an energy supply interface coupleable to an energy supply unit separate from the basic module and the expansion module, wherein energy provided via the energy supply interface is used to supply energy to the expansion module.

A radiometric detector is provided for detecting a measurement variable. The detector is particularly failsafe with, simultaneously, a simple, space-saving and cost-effective design, without having losses in the signal-to-noise ratio.

A radiometric detector is provided for detecting a measurement variable. The detector is particularly failsafe with, simultaneously, a simple, space-saving and cost-effective design, without having losses in the signal-to-noise ratio.

A source well divider for use with a nuclear level gauge on a process vessel 24, permits the insertion of multiple radiation sources 12 in the source well. The divider includes a plurality of lengths of flexible interlocked metallic tubing 18, each length extending into the source well 22 from a nozzle in the vessel 24, forming a plurality of independent sub-wells each permitting the installation of an independently cabled radiation source 12 into the source well.

A source well divider for use with a nuclear level gauge on a process vessel 24, permits the insertion of multiple radiation sources 12 in the source well. The divider includes a plurality of lengths of flexible interlocked metallic tubing 18, each length extending into the source well 22 from a nozzle in the vessel 24, forming a plurality of independent sub-wells each permitting the installation of an independently cabled radiation source 12 into the source well.

The invention relates to a measuring arrangement (1) for radiometric density- or fill level measurement of a medium in a measuring tube (2) in the field of automation technology. The measuring arrangement (1) is composed of a radioactive radiation source (3), a detector unit (4) and a clamping apparatus for the radiation source (3) as well as the detector unit (4). The invention is distinguished by features including that the clamping apparatus has blocking elements (7,8,9,10), which make the radiation cone (17) of the radioactive radiation source (3) between the measuring tube (2) and the clamping apparatus laterally inaccessible. In such case, the blocking elements (7,8,9,10) are arranged in such a manner that the measuring arrangement (1) is suitable for different diameters of the measuring tube (2), without the blocking elements (7,8,9,10) losing their protective action.

The invention relates to a measuring arrangement (1) for radiometric density- or fill level measurement of a medium in a measuring tube (2) in the field of automation technology. The measuring arrangement (1) is composed of a radioactive radiation source (3), a detector unit (4) and a clamping apparatus for the radiation source (3) as well as the detector unit (4). The invention is distinguished by features including that the clamping apparatus has blocking elements (7,8,9,10), which make the radiation cone (17) of the radioactive radiation source (3) between the measuring tube (2) and the clamping apparatus laterally inaccessible. In such case, the blocking elements (7,8,9,10) are arranged in such a manner that the measuring arrangement (1) is suitable for different diameters of the measuring tube (2), without the blocking elements (7,8,9,10) losing their protective action.

A nuclear level sensing gauge for measuring the level of product in a bin utilizes a plurality of scintillators arranged in a serial fashion. A source of nuclear radiation is positioned adjacent the bin, and the scintillators, which may be bundles of one or more scintillating fibers or scintillating crystals, are positioned in a serial fashion adjacent the bin opposite the source of nuclear radiation, such that nuclear radiation passing through the bin impinges upon the bundles. Light guides carry photons emitted by the scintillatorswhich are indicative of radiation passing through the binto a common photomultiplier tube. The tube is connected to electronics which convert counts of photons from the PMT into a measure of the level of radiation-absorbing product in the bin.

An apparatus for measuring the level of a medium in a container has a plurality of radioactive emitters which are mutually movable in order to be arranged at a different height level in each case in the container, a protective tube reaching into the container with an extent at least partially in the vertical direction, and an elongate holding device for the emitters, which is introducible into the protective tube and to which the emitters are fastened. A storage device for the holding device together with the emitters, a connection from the storage device to the protective tube, and a conveying device for conveying the holding device into the protective tube and out of the latter are also provided, wherein the holding device is configured to be length-invariant.