The LB 123 is not just one instrument, but is a complete system of radiation protection instrumentation. It covers measurement of surface contamination, gamma doserate, neutron doserate and activity. A variety of different contamination detectors enables the measurement of alpha/beta-emitters, beta/gamma- emitters and even tritium.

The LB 123 consists of a battery driven datalooger unit, where one of seven available radiation detectors could be connected. High voltage supplies, preamplifier and discriminators are integrated in the probes, which are identified automatically by the system. Operation of the LB 123 is very simple. The Micro-Controller program provides many useful functions and utilities like for instance background measurement with automatic substraction, scalertimer-mode, autorepetitive mode, dose-integration, plateau measurement, storage of up to 250 measured values, datatransfer to printer or host via optical RS232 port.

The UMo's display is a high-contrast dot-matrix display with background illumination. Universal application of the instrument and programming via soft keys are possible only due to the high flexibility of this display. For example, different units can be selected for the measured values, such as mSv/h or mrem/h.

A wall bracket incorporating a mains-connection unit permits stationary, continuous operation, e.g. as a local dose rate measuring system or as an exit contamination monitor, as well as operation with rechargeable batteries. However, even in such a configuration the LB 123 can be removed from the wall bracket and used as a portable instruments.

The proportional counter probe LB 1236-H10 is used for dose and dose rate measurements. It has been approved by the German Office of Standards (PTB) as a dose rate meter.

The energy range from 30 keV up allows measurements in the 125I-lab as well as in some parts of radiology. The dose rate range covers 6 decades from 50 nSv/h to 10 mSv/h (0,5 µrem/h to 1 rem/h).

In addition to using the UMo as a portable instrument, as shown in the picture, the instrument may also be used for stationary applications as a room or area dose rate monitor.