FAQ

Are FIBERTOP manhole covers transparent to electromagnetic waves ?

M.M. manhole covers made of composite material have been tested to determine how they interfere with electromagnetic waves in a range of frequency from 800 Mhz to 6 Ghz. The interference that was determined is practically irrelevant, i. e. the manhole cover made of composite material does not create any disturbance to radio frequencies or to wireless and cellphone communication.

This important feature makes the manhole cover made of composite material ideal to be used in all those situations in which the use of radio-transmitting devices are involved to send a radio signal to a reader or a control center.

Some applications are the following:

• transport systems: covering for devices which are used for controlling and managing train, tram and underground operations
• sewer system: covering of holes with level sensors connected to a control center
• drinking water networks: covering of metering devices which can be read remotely

For “smart cities” M.M.’s FRP manhole covers are an unavoidable option.