本特利990变送器，990-04美国本特利涡流传感器系列一般提供原始振动信号，一款轴振动轴位移可以直接提供4-20mA信号的则为990和991. 990变送器（轴振动）提供4至20 mA比例振动信号作为他们的机械控制系统的输入。接受来自bently 3300 NSV接近探头的输入及其配套的延长线。
The 990 Vibration Transmitter is intended primarily for the original equipment manufacturers (OEMs) of centrifugal air compressors or small pumps, motors, or fans who prefer to provide a simple 4 to 20 mA proportional vibration signal as the input to their machinery control system.bently 990变送器（轴振动）常和下列传感器、延长电缆、前置器配套
传感器330903-00-03-50-02-00
传感器330903-00-04-50-02-00
传感器330903-00-21-10-02-05
传感器330903-00-23-10-02-05
传感器330904-08-15-10-02-00  
传感器330904-08-15-10-02-05
传感器330905-00-05-10-02-00
传感器330905-00-08-10-02-00  
传感器330905-00-09-05-01-00
传感器330905-00-10-10-02-00
传感器330905-00-25-05-02-05
传感器330907-05-30-10-02-00
传感器330907-05-30-10-02-CN
传感器330910-00-05-10-02-00
传感器330910-00-05-10-02-00
延长电缆330930-040-00-00  
延长电缆330930-040-03-00  
延长电缆330930-045-00-00
延长电缆330930-060-00-00
延长电缆330930-060-00-CN
延长电缆330930-060-01-00
延长电缆330930-060-01-05
延长电缆330930-065-00-00
延长电缆330930-065-01-00
延长电缆330930-065-01-05
延长电缆330930-065-02-00
延长电缆330930-065-03-00
前置器330980-50-00
前置器330980-70-00

bently 990变送器（轴振动）常用型号
990-04-50-01-00
990-04-50-01-01
990-04-50-02-00
990-04-50-02-01
990-04-70-01-00
990-04-70-01-01
990-05-50-01-00
990-05-50-02-00
990-05-50-02-01
990-05-70-02-00
990-05-70-01-01
990-05-70-02-01

bently 991变送器则为轴位移变送器

bently 990变送器维护和故障排除.校准和执行以下调整