Siemens 7MJ2000-.....

Acoustic sensors for acoustic diagnostic SITRANS DA400 Stainless steel body with IP66/IP68 degree of protection Electronic encapsulated Permissible ambient temperature for operation max. -40 to + 110 C (-40 to +230 F) Ex-version -20 to +50 C (-4 to +122 F) at T6 Size 26x40x29mm (1.02 X 1.57 X 1.41 in)