In March, 2017, Beijing SWISA Instrument Co., Ltd started the SIL approval applying for magnetostrictive level transmitter. In April, BV China (Bureau Veritas Quality Services(Shanghai) Co., Ltd.) started the 1st training to SWISA’s research personnel.
Remarks:
SIL stands for Safety Integrity Level. There are four levels from SIL I to SIL IV. The higher the SIL level, the lower the probability of failure on demand for the safety system and the better the system performance. Also, the higher the SIL level, the higher the cost and complexity of the system.
SIL level applies to an entire system. It has to be used when implementing a SIF that must reduce an existing intolerable process risk level to a tolerable risk range.