Exhibit 21.1

Subsidiaries of Sensata Technologies B.V.



|                                                                   |  |                              
|------------------------------------------------------------------ |  | -----------------------------
|Name                                                               |  | Jurisdiction of Incorporation
|                                                                   | 
|Sensata Technologies Japan Limited                                 |  | Japan                        
|                                                                   | 
|Sensata Technologies Malaysia Sdn. Bhd.                            |  | Malaysia                     
|                                                                   | 
|Sensata Technologies Korea Limited                                 |  | Korea                        
|                                                                   | 
|Sensata Technologies Holland B.V.                                  |  | The Netherlands              
|                                                                   | 
|Sensata Technologies Holding Company Mexico, B.V.                  |  | The Netherlands              
|                                                                   | 
|Sensata Technologies de México, S. de R.L. de C.V.                 |  | Mexico                       
|                                                                   | 
|Servicios Administrativos Sensata Technologies, S. de R.L. de C.V. |  | Mexico                       
|                                                                   | 
|Sensata Technologies Finance Company LLC                           |  | United States                
|                                                                   | 
|Sensata Technologies Holding Company, U.S., B.V.                   |  | The Netherlands              
|                                                                   | 
|Sensata Technologies, Inc.                                         |  | United States                
|                                                                   | 
|Sensata Technologies India Private Limited                         |  | India                        
|                                                                   | 
|Sensata Technologies Singapore, Pte. Ltd.                          |  | Singapore                    
|                                                                   | 
|Sensata Technologies Taiwan Co., Ltd.                              |  | Taiwan                       
|                                                                   | 
|Sensata Technologies Hong Kong Ltd.                                |  | Hong Kong                    
|                                                                   | 
|Sensata Technologies Baoying Co., Ltd.                             |  | China                        
|                                                                   | 
|Sensata Technologies Spain, S.L.                                   |  | Spain                        
|                                                                   | 
|Sensata Technologies Germany GmbH                                  |  | Germany                      
|                                                                   | 
|Sensata Technologies Sensores E Controles do Brasil Itda.          |  | Brazil                       
|                                                                   | 
|Sensata Technologies Changzou Co., Ltd.                            |  | China                        
|                                                                   | 
|Sensata Technologies China Limited                                 |  | China                        
|                                                                   | 
|Sensata Technologies Italia S.r.L                                  |  | Italy                        
|                                                                   | 
|First Inertia Switch Ltd. (US)                                     |  | United States                
|                                                                   | 
|Control Devices, Inc.                                              |  | United States                
|                                                                   | 
|CDI Netherlands B.V.                                               |  | The Netherlands              
|                                                                   | 
|RDI Management Company, Inc.                                       |  | United States                
|                                                                   | 
|CDI Holding International SAS                                      |  | France                       
|                                                                   | 
|FTCP Holdings Ltd.                                                 |  | United Kingdom               
|                                                                   | 
|Sensata Technologies Limited                                       |  | United Kingdom               
|                                                                   | 
|FTCP Bermuda Ltd.                                                  |  | Bermuda                      
|                                                                   | 
|Sensata Technologies Dominicana, SA                                |  | Dominican Republic           
|                                                                   | 
|Sensata Technologies Dominicana Holdings, SA                       |  | Dominican Republic           
|                                                                   | 
|First Technology (Europe) Limited                                  |  | United Kingdom               



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|                                                |  |                              
|----------------------------------------------- |  | -----------------------------
|Name                                            |  | Jurisdiction of Incorporation
|                                                | 
|Sensata Technologies Mass, Inc.                 |  | United States                
|                                                | 
|Sensata Technologies Maryland, Inc.             |  | United States                
|                                                | 
|Airpax de Mexico SA de CV                       |  | Mexico                       
|                                                | 
|Airpax Electronics de Mexico, S. de R. L. de CV |  | Mexico                       
|                                                | 
|Nihon Airpax Company, Ltd.                      |  | Japan                        
|                                                | 
|Airpax Electronics (Shanghai) Company, Ltd.     |  | China                        
|                                                | 
|Airpax U.K., Ltd.                               |  | United Kingdom