Bently Nevada 3500/64M Dynamic Pressure Monitor – High-fidelity Dynamic Pressure Protection for Turbomachinery and Combustion Assets

• Warranty: 365 days from delivery

• Lead time: 1 week if in stock; no more than 1 month latest

• Payment terms: 50% advance; balance prior to shipment

• Express options: FedEx, UPS, DHL

• Packaging: anti-static protection and shock-tested carton for rack modules

• Traceability: serial-number verification and functional test record available on request

• Dynamic pressure measurement – Captures high-frequency pressure fluctuations for surge, stall, and combustion dynamics instead of just static pressure.

• Works with piezoelectric/IEPE dynamic pressure sensors – Typically supports ICP/IEPE-type transducers commonly used on gas turbines and compressors.

• Programmable alert and danger setpoints – Configurable alarm logic with OK/Not OK monitoring to support true API 670-style protection strategies.

• Buffered outputs for diagnostics – Buffered dynamic pressure signal available at the I/O, making it easy to validate sensors and perform deeper analysis.

• Phase-synchronous analysis – You might notice that it pairs naturally with a 3500/25 Keyphasor module for synchronous capture and order-based diagnostics.

• Rack-level communications – Data access via 3500/22M TDI and 3500/92 Modbus/TCP gateway; integrates with System 1 in many cases.

• Hot-swappable in the 3500 rack – Field-replaceable module and I/O without rewiring the entire cabinet, which minimizes downtime.

Plants usually deploy the 3500/64M on gas turbines, compressors, and pumps where dynamic pressure tells the real story. A few practical examples:

• Gas turbine combustors – Monitoring combustion dynamics and instability to avoid hardware damage and lost efficiency.

• Centrifugal compressors – Surge and rotating stall detection using high-frequency pressure pulsations.

• Pumps and cavitation – Identifying cavitation onset to protect seals and impellers before vibration spikes.

• Process reactors and piping – Detecting abnormal pulsation in reciprocating services and pulsation dampener performance issues.

A maintenance lead at a combined-cycle site told us their “first actionable warning of a combustor issue came from the 3500/64M trend, not the standard DCS pressure,” which seems to be a common pattern in high-dynamics environments.

• Reliability – Built on the proven 3500 platform with redundant rack options; typically fewer nuisance trips when set up correctly.

• Compatibility – Works within existing 3500 racks, relays, and gateways; uses widely available dynamic pressure sensors.

• Lower lifecycle cost – Reuses your rack power, Keyphasor, and comms; no stand-alone analyzer needed for protection.

• Data you can use – Buffered outputs and rack comms make it straightforward to validate sensor health and feed diagnostics to historians or System 1.

• Serviceability – Front-module replacement and rear I/O retention usually keep outages short and predictable.

• Cabinet & environment – Install in a 3500 rack within a clean, ventilated cabinet; maintain ambient conditions typically within 0…+65°C and avoid direct heat sources.

• Grounding & shielding – Use shielded sensor cables with single-point grounding; route separately from high-voltage lines to reduce noise.

• Wiring – Terminate sensors on the 64M rear I/O; verify polarity and connector torque. Keep cable runs as short as practical.

• Alarms & logic – From my experience, start with conservative alert/danger thresholds and refine after reviewing initial operating data.

• Routine checks – Quarterly sensor OK checks; review buffered waveform for clipping/noise; validate alarm actions via the rack’s event logs.

• Firmware/config – Keep the rack’s TDI and configuration tools updated; back up configuration files after each change.

• Safety – De-energize the rack slot before inserting/removing modules in hazardous areas; follow site rules for Zone 2/Class I, Div 2.

• CE and UL/cUL compliance for industrial environments (rack-level certifications apply).

• RoHS-compliant materials, based on typical 3500-family declarations.

• Designed for use in hazardous locations such as ATEX/IECEx Zone 2 or Class I, Div 2 when installed in an approved 3500 rack (verify exact marking for your build).

• Manufacturer’s quality system aligned with ISO practices for production and test.

• Warranty: 365 days, with functional testing prior to shipment.

If you’re standardizing on the 3500 platform and need dependable dynamic pressure protection—especially on combustors and high-energy compressors—the 3500/64M typically hits the balance between protection and diagnostics without complicating your cabinet design.