| Bharat Electronics Ltd (BEL) | Yes (BEL / 500049) | Defense, industrial, radar, environment | India’s largest; radar, imaging, infrared, proximity, pressure |
| Honeywell Automation India Ltd | Yes (HONAUT / 517174) | Industrial, environmental, pressure, gas, IoT | Automation, process, safety, smart city, export |
| Bosch Ltd | Yes (BOSCHLTD / 500530) | Automotive, MEMS, industrial, environmental | Automotive, motion, pressure, temp, IoT, export hub |
| Siemens Ltd | Yes (SIEMENS / 500550) | Industrial, automation, process, smart sensors | Proximity, temp, flow, position, robotics, IIoT |
| Schneider Electric Infrastructure Ltd | Yes (SCHNEIDER / 534139) | Automation, industrial, power, safety sensors | Smart automation, building, energy management |
| ABB India Ltd | Yes (ABB / 500002) | Industrial, process, robotics, smart sensors | Process, flow, pressure, robotics, IIoT |
| Texas Instruments India Pvt Ltd | No | Analog, MEMS, environmental, IC sensors | Bengaluru design center, large export, global parent |
| STMicroelectronics Pvt Ltd (India) | No | MEMS, motion, environmental, automotive sensors | Bengaluru design/R&D, global supplier |
| Murata Electronics India | No | MEMS, environmental, automotive, custom sensors | Major Japanese MNC, factory in Manesar, Gurgaon |
| Sensortronics | No | Force, pressure, load, position, displacement | Indian SME, wide industrial use |
| Photonic Sensors Pvt Ltd | No | Optical, photonic, environmental | Fiber optics, biomedical, IoT |
| Pyrotech Electronics Pvt Ltd | No | Temperature, humidity, process, industrial | Udaipur-based, major OEM for Indian automation |
| Toshniwal Sensors Pvt Ltd | No | Temperature, process, industrial, custom | Jaipur-based, strong in process industry sensors |
| Secure Meters Ltd | No | Smart meter, current, environmental | Energy management, smart city, Jaipur |
| JUMO India Pvt Ltd | No | Temperature, pressure, level, flow | German MNC, Indian operations |
| Larsen & Toubro Ltd (L&T) | Yes (LT / 500510) | Industrial, process, automation sensors | Automation, heavy engineering |
| Godrej & Boyce (Automation division) | No | Automation, industrial, safety sensors | In-house manufacturing, industrial applications |
| Molex India (Kochi, Bengaluru, Pune) | No | Sensors, connectors, automotive, industrial | Global MNC with Indian production |
| Sensomatic Sensors Pvt Ltd | No | Load, pressure, force, automation sensors | Industrial, weighing, export |
| SMARTEC Automation Pvt Ltd | No | Custom, industrial, automation sensors | Ahmedabad-based, sensors and automation systems |