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Is this what you are trying to do?

EnergyManagementSystem:Sensor,
  CHWT,                                  !- Name
  Chiller Evaporator Outlet Temperature, !- Output:Variable or Output:Meter Index Key Name
  NameOfChiller;                         !- Output:Variable or Output:Meter Name

Is this what you are trying to do?

EnergyManagementSystem:Sensor,
  CHWT,                                  !- Name
  Chiller Evaporator Outlet Temperature, !- Output:Variable or Output:Meter Index Key Name
  NameOfChiller;                         !- Output:Variable or Output:Meter Name

You can use any report variable found in the rdd file as a sensor. For chillers, I ran the example file 5ZoneAirCooled.idf and looked at the rdd file after the simulation completed. I added Output:VariableDictionary,IDF; to the file so the rdd file would print in a specific format. Then in the rdd you see this:

Output:Variable, *, Chiller Evaporator Outlet Temperature, hourly; !- HVAC Average [C]

Where the * is the key name of the chiller for report variables. If you use the asterisk you get all chiller outlet temperatures for all chillers. If you add the key name you get the chiller outlet temperature for the specific chiller.

Output:Variable, MyChiller, Chiller Evaporator Outlet Temperature, hourly; !- HVAC Average [C]

Is this what you are trying to do?

EnergyManagementSystem:Sensor,
  CHWT,                                  !- Name
  Chiller Evaporator Outlet Temperature, !- Output:Variable or Output:Meter Index Key Name
  NameOfChiller;                         !- Output:Variable or Output:Meter Name

You can use any report variable found in the rdd file as a sensor. For chillers, I ran the example file 5ZoneAirCooled.idf and looked at the rdd file after the simulation completed. I added Output:VariableDictionary,IDF; to the file so the rdd file would print in a specific format. Then in the rdd you see this:

Output:Variable, *, Output:Variable,*, Chiller Evaporator Outlet Temperature, hourly; Temperature,hourly; !- HVAC Average [C]

Where the * is the key name of the chiller for report variables. If you use the asterisk you get all chiller outlet temperatures for all chillers. If you add the key name you get the chiller outlet temperature for the specific chiller.

Output:Variable, MyChiller, Chiller Output:Variable,MyChiller,Chiller Evaporator Outlet Temperature, hourly; Temperature,hourly; !- HVAC Average [C]

Is this what you are trying to do?

EnergyManagementSystem:Sensor,
  CHWT,                                  !- Name
  Chiller Evaporator Outlet Temperature, !- Output:Variable or Output:Meter Index Key Name
  NameOfChiller; MyChiller;                             !- Output:Variable or Output:Meter Name

You can use any report variable found in the rdd file as a sensor. For chillers, I ran the example file 5ZoneAirCooled.idf and looked at the rdd file after the simulation completed. I added Output:VariableDictionary,IDF; to the file so the rdd file would print in a specific format. Then in the rdd you see this:

Output:Variable,*, Chiller Evaporator Outlet Temperature,hourly; !- HVAC Average [C]

Where the * is the key name of the chiller for report variables. If you use the asterisk you get all chiller outlet temperatures for all chillers. If you add the key name you get the chiller outlet temperature for the specific chiller.

Output:Variable,MyChiller,Chiller Evaporator Outlet Temperature,hourly; !- HVAC Average [C]

Is this what you are trying to do?

EnergyManagementSystem:Sensor,
  CHWT,                                  !- Name
  Chiller Evaporator Outlet Temperature, !- Output:Variable or Output:Meter Index Key Name
  MyChiller;                             !- Output:Variable or Output:Meter Name

You can use any report variable found in the rdd file as a sensor. For chillers, I ran the example file 5ZoneAirCooled.idf and looked at the rdd file after the simulation completed. I added Output:VariableDictionary,IDF; to the file so the rdd file would print in a specific format. Then in the rdd you see this:

Output:Variable,*, Chiller Evaporator Outlet Temperature,hourly; !- HVAC Average [C]

Where the * is the key name of the chiller for report variables. If you use the asterisk you get all chiller outlet temperatures for all chillers. If you add the key name you get the chiller outlet temperature for the specific chiller.

Output:Variable,MyChiller,Chiller Evaporator Outlet Temperature,hourly; !- HVAC Average [C]

For EMS sensors the Output:Variable or Output:Meter Index Key Name is the name of the report variable in the rdd file. The Output:Variable or Output:Meter Name is the name of the object that would report that report variable (the name of the chiller in this example).