diff --git a/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml b/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml
index 2fb7dbd7c..e119c61e9 100644
--- a/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml
+++ b/ontology/yaml/resources/HVAC/entity_types/ABSTRACT.yaml
@@ -8325,6 +8325,13 @@ ZOC:
   implements:
   - MONITORING
 
+MS:
+  guid: "04d281a6-d5cb-4cdc-b229-90fc5e756271"
+  description: "Motion sensing monitoring. For occupancy status (occupied and unoccupied space and desk/seat)"
+  is_abstract: true
+  uses:
+  - motion_status  
+
 SPLM:
   guid: "d92998e1-1091-4291-a1f9-b8cc0e3aa334"
   description: "Sound pressure level monitoring"
diff --git a/ontology/yaml/resources/HVAC/entity_types/SENSOR.yaml b/ontology/yaml/resources/HVAC/entity_types/SENSOR.yaml
index 0f16d895e..2abd66c7c 100644
--- a/ontology/yaml/resources/HVAC/entity_types/SENSOR.yaml
+++ b/ontology/yaml/resources/HVAC/entity_types/SENSOR.yaml
@@ -372,3 +372,11 @@ SENSOR_SFM:
   implements:
   - /SENSOR
   - SFM
+
+SENSOR_MS:
+  guid: "51314277-425a-4fd1-baa7-b71bdf8b65c9"
+  description: "Motion sensor. Space and desk/seat occupancy monitoring (occupied/unoccupied)"
+  is_canonical: true
+  implements:
+  - /SENSOR
+  - MS
\ No newline at end of file