diff --git a/confluent_server/confluent/plugins/hardwaremanagement/proxmox.py b/confluent_server/confluent/plugins/hardwaremanagement/proxmox.py
index 9de5d73e..03d776f5 100644
--- a/confluent_server/confluent/plugins/hardwaremanagement/proxmox.py
+++ b/confluent_server/confluent/plugins/hardwaremanagement/proxmox.py
@@ -392,6 +392,7 @@ async def retrieve(nodes, element, configmanager, inputdata):
             yield msg.ConfluentNodeError(node, "vnc available, screenshot not available")
         elif element == ['health', 'hardware']:
             yield msg.HealthSummary('unknown', node)
+            yield msg.SensorReadings([], node)
 
 async def update(nodes, element, configmanager, inputdata):
     clientsbynode = prep_proxmox_clients(nodes, configmanager)
diff --git a/confluent_server/confluent/plugins/hardwaremanagement/vcenter.py b/confluent_server/confluent/plugins/hardwaremanagement/vcenter.py
index 763ff71a..8249f609 100644
--- a/confluent_server/confluent/plugins/hardwaremanagement/vcenter.py
+++ b/confluent_server/confluent/plugins/hardwaremanagement/vcenter.py
@@ -382,6 +382,8 @@ async def retrieve(nodes, element, configmanager, inputdata):
                 yield msg.ScreenShot(imgdata, node, imgformat=imgformat)
         elif element == ['health', 'hardware']:
             yield msg.HealthSummary('unknown', node)
+            yield msg.SensorReadings([], node)
+