diff --git a/ontology/saref4wear.ttl b/ontology/saref4wear.ttl
index 79b1d3272c4459b7f60c37895970da13c388b24b..684a187d0fd400ad299e6a6fd7f4f804d97afb71 100644
--- a/ontology/saref4wear.ttl
+++ b/ontology/saref4wear.ttl
@@ -471,10 +471,6 @@ s4wear:Sensing rdf:type owl:Class ;
                rdfs:subClassOf s4wear:Capability .
 
 
-###  https://saref.etsi.org/saref4wear#Sensor
-s4wear:Sensor rdf:type owl:Class .
-
-
 ###  https://saref.etsi.org/saref4wear#Software
 s4wear:Software rdf:type owl:Class ;
                 rdfs:subClassOf s4wear:Entity .
@@ -614,6 +610,13 @@ saref:Property rdf:type owl:Class ;
                rdfs:label "Property"@en .
 
 
+###  https://saref.etsi.org/saref#Sensor
+saref:Sensor rdf:type owl:Class ;
+             rdfs:subClassOf saref:Device ;
+             rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;
+             rdfs:label "Sensor"@en .
+
+
 ###  https://saref.etsi.org/saref#UnitOfMeasure
 saref:UnitOfMeasure rdf:type owl:Class ;
                     rdfs:isDefinedBy <https://saref.etsi.org/saref#> ;