Pressure Transducer for Train Brake Unit


Air Brake Operating Units (BOU) are used extensively on passenger and freight trains around the world. Pressure transducers are mounted under the train in harsh environments on the BOU to monitor system air pressures as part of the control circuit to open and close the main air control valves used to apply & release the brakes. 

In addition, pressure transducers are used to measure the weight of the passenger load via airbags to help offset the braking force to safely stop the train. In addition, because of the multiple systems involved on trains, there is a high level Electro Magnetic Interference (EMI), Radio Frequency Interference (RFI), and chassis noise, which can disrupt sensor communication. This is crucial to ensure the pressure sensor transducers are built with the proper electrical isolation and protection.


Challenge: Maintaining high accuracy under extreme operating temperatures

Maintaining high accuracy under extreme operating temperatures to ensure precise air pressure monitoring 

2200 Series Pressure Transducerwhile also handling high shock and vibration conditions and delivering uninterrupted output signals in a high EMC environment.


Solution: 2200 Series Pressure Transducer

Gems 2200 Series has been proven in the rail industry to provide high reliability and <2% total error band (TEB) accuracy measurement, while also meeting MIL-STD-810 for shock and vibration, and incorporating high isolation with enhanced EMI, RFI, and surge protection circuitry to ensure continuous operation in a harsh environment. As a highly regulated industry, our products have proven to achieve the EN-50155 and IEC  62236-3-2  Industry regulated standards required for use on passenger and freight trains.