If you have questions about our products, Fill out the form below and we will answer any questions you have. Tips: Fields marked with*are required. Bently Nevada 3500/42M 140734-02+128229-01 Pre-Amplifier Monitor + I/O Module Introduction The Bently Nevada 3500/42M 140734-02+128229-01 Pre-Amplifier Monitor + I/O Module is a vital component of the 3500 Condition Monitoring System , designed to provide accurate monitoring of vibration and proximity signals from in *Your Name: *Your Email: *Your Name: *Vdcode: Submit