The Camur II system has been created for permanent and automatic monitoring of corrosion in concrete structures. It uses phone lines, mobile phone or internet networks to provide control features for data retrieval. Unlike traditional systems, data logged by the Camur II system is recorded and distributed digitally. 

Traditional automatic monitoring is based on analogue transfer of the measured signal back to one
or more central dataloggers. The central datalogger takes care of analogue/digital conversion and  
storage of the measurement data. However, there are a number of drawbacks with this approach including the large amount of cables required for analogue transfer (a separate cable must run from the datalogger to each sensor individually); high sensitivity to electromagnetic noise (because the measurement signals are transferred in analogue form); and errors in the actual connections (since this kind of datalogger will not usually have galvanic isolation between the channels).

The Camur II system works differently. It consists of small electronic units called "nodes" - one
"node" is placed near to every sensor. The node contains an A/D converter, a microprocessor,
galvanic separation between analogue and digital side, and analogue circuitry to perform advanced measurements like LPR (Linear Polarisation Resistance). The node may even be embedded in concrete alongside the sensor if required, to keep it close to the sensor.

To collect the data, only one single bus cable is needed. This bus cable runs next to every node and ends at the Camur II Controller. The Controller will then store all the data, as well as providing a communication link with all the individual nodes and directly to your computer. Important advantages with the Camur II system:

• Digital signal transfer, protects integrity of measured signal, immune to electromagnetic noise
• Signal transferred digitally on a bus, drastically reduce amount of cables
• Galvanic separation between analogue and digital side of nodes, eliminates risk of errors due to accidental, unintentional connections between sensors
• "Plug and play" functionality, every sensor gets ID and intelligence through it's node
• Advanced measurements – every sensor has it's own microprocessor 

Traditional automatic monitoring is based on analogue transfer of the measured signal back to one or more central dataloggers. The central datalogger take care of analogue/digital conversion and  storage of the measurement data. The most important drawbacks with this approach is a large amount of cables for analogue transfer (because a separate cable must run from the datalogger to every single sensor), sensitivity to electromagnetic noise (because the measurement signal are transferred in analogue form) and errors in connections (because this kind of dataloggers often don't have galvanic isolation between channels).

Contact Protector for more information.