Jewell accelerometers and inclinometers are very rugged devices with exceptional performance, but what differentiates our models with “-R” (R meaning Rail) from the other sensors? There are 3 main differences that makes them ideal for Rail applications:
- The “-R” has a special filtered connector used to reduce radio frequency interference (RFI) and electromagnetic interference (EMI) in Rail systems. Those filtered connectors normally incorporate capacitors and inductors located directly into the connector housing acting like a barrier that protects the internal electronics from external noise ensuring optimum output signal quality.
- They also have an extra PCB board internally for transient voltage suppression to meet the CENELEC/AREMA standards. This board will filter out transient RF signals that could affect the performance and reliability of the sensor, dissipate high transient power surges and clamp sudden spikes in input voltages in order to protect the internal electronic circuits from damage. Such over-voltage can be caused by lightning surges, power supply fluctuation and/or electrostatic discharge (ESD).
- Our -R models are CENELEC and AREMA certified and compliant to an extensive list of test requirements including Electromagnetic compatibility (EMC), shock & vibration as well as Environmental Testing.
Not only the -R models, but all Jewell sensors are fully self-contained. They connect to a DC power source and a readout or control device for a complete control system. The output is
a high-level DC signal proportional to acceleration and tilt angle sine from as little as ± 0.010 g to ±20 g full range. Jewell sensors respond to changes in velocity as small as 1μg and have hysteresis of less than 0.0005% of full range.
Because of Jewell’s commitment to the highest quality, precision and reliability, Jewell’s sensors have been utilized in the train control market for many decades. They are crucial feedback components for rail safety & control providing passengers with a safe controlled ride in systems automatically adjusting the train’s acceleration & deceleration rate. Our inclinometers also offer high accuracy and rugged solutions to measure low frequency tilt in applications where high shock & vibration are present.
Jewell engineers will be glad to discuss your specific application requirements to determine the ideal solution for your project. Contact us today!