separators and shakers are disclosed with real time monitoring of screen condition ; killing apparatus for killing living things in fluid flowing from a separator or shaker ; and / or heating apparatus for heating material fed to or flowing from a separator or shaker . this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims , 38 c . f . r . 1 . 72 .