RDP Electronics reports that its Model 41 load cells have proved tough enough to handle rocket motor testing. These dual bridge configuration cells are in demand from British rocket motor manufacturers for use in testing programmes.
Rocket engine testing is expensive, so it is important that tests produce good quality verified data. Load cells have to meet the arduous conditions placed on the transducer. A dual bridge load cells ensures that the two entirely separate bridge networks can be separately logged and cross-referenced to verify maximum data validity.
Dual-bridge load cells also mean that, in the rare event of a large load spike, there is a better chance of one out of two of the bridges surviving to complete the measurement cycle. Effectively two load cells contained in a single housing, each with its own connectors and strain gauge networks, dual bridge cells permit two sets of signal conditioning electronics to be deployed. This provides an integral data check for better measurement confidence, and redundancy in the event of a cell failure.