Bently Nevada 21000-16-05-00-090-04-02 Proximity Probe

Product Details

21000-16-05-00-090-04-02 Product Description

The Bently Nevada 21000-16-05-00-090-04-02 is a precision eddy-current proximity probe engineered as a core sensing element within the Bently Nevada 21000 Series machinery protection and condition monitoring architecture. With a 16 mm probe tip diameter, a 5-metre extension cable, and a calibrated output range optimized for the 21000 driver/monitor ecosystem, this probe delivers the signal fidelity and dimensional consistency required for seamless system-level integration across rotating machinery protection platforms. Whether deployed in turbine trains, compressor strings, pump sets, or gearbox monitoring loops, the 21000-16-05-00-090-04-02 functions not as an isolated sensor but as a precision node within a layered, redundant, and diagnostically capable control architecture.

The 21000-16-05-00-090-04-02 achieves its full diagnostic and protective value only when considered within the broader Bently Nevada control and monitoring architecture. At the sensing layer, this probe pairs directly with the 21000-05-00-00-00 proximitor/driver module, which conditions the raw eddy-current signal into a calibrated voltage output suitable for downstream monitor processing. The conditioned signal feeds into rack-mounted monitor modules such as the 3500/40M proximitor I/O module or the 3500/42M proximity transducer I/O module, both of which reside within the 3500 Series Machinery Protection System rack — a modular, 19-inch backplane architecture that supports up to 16 I/O modules per rack with a dedicated 3500/20 Rack Interface Module managing communications and system health.

At the communications layer, the 3500 rack interfaces with plant-level DCS or SCADA systems via the 3500/92 Communication Gateway Module, supporting Modbus TCP, PROFIBUS DP, and OPC-DA protocols. This enables the vibration and position data captured by the 21000-16-05-00-090-04-02 to be transmitted in real time to historian platforms and operator workstations without signal degradation or latency. For installations requiring redundant monitoring, the 3500/22M transient data interface module can be added to the same rack, enabling full waveform capture and orbit plot generation alongside continuous protection monitoring — a critical capability for turbomachinery diagnostics in power generation and petrochemical applications.

At the power layer, the 3500/15 Power Supply Module provides regulated DC power to all rack-resident modules, with optional dual-redundant power supply configurations ensuring uninterrupted monitoring even during single-supply failures. The probe cable routing from the 21000-16-05-00-090-04-02 to the proximitor is typically managed through armoured conduit or cable trays, with junction boxes such as the 3300/55 Field Wiring Termination Block providing a clean, labelled interface between field cabling and rack wiring. For HMI and operator interface, the System 1 Evolution software platform aggregates all channel data from the 3500 rack, presenting vibration trends, alarm states, and machinery health indices on operator displays — enabling condition-based maintenance decisions grounded in real-time sensor data from probes including the 21000-16-05-00-090-04-02.

In multi-machine train configurations — such as a gas turbine driving a centrifugal compressor through a gearbox — multiple 21000-series probe sets are deployed across each bearing location, with each probe channel independently monitored and alarmed within the 3500 rack. This architecture ensures that a single probe or cable fault does not compromise the protection of adjacent machinery, and that the 3500/32 4-Channel Relay Module can execute independent trip logic per machine train section. The result is a modular, scalable, and diagnostically rich protection architecture in which the 21000-16-05-00-090-04-02 serves as the primary signal source for radial vibration and shaft position measurement.

Power Generation: In gas turbine and steam turbine protection systems, the 21000-16-05-00-090-04-02 is mounted at each journal bearing to monitor shaft radial vibration and relative shaft position. The probe's 16 mm tip diameter and 5-metre cable length accommodate the physical constraints of turbine bearing housings, while the calibrated output ensures that the 3500 monitor rack receives accurate, repeatable signals for high-vibration trip logic and slow-roll compensation algorithms.

Petrochemical and Refinery: In centrifugal compressor strings and process gas blowers, axial position monitoring using the 21000-16-05-00-090-04-02 in thrust bearing configurations provides early warning of rotor axial migration — a critical protection function in high-pressure process environments where undetected thrust bearing wear can result in catastrophic machinery failure and process shutdown.

Water and Wastewater Treatment: Large vertical pump sets and blower trains in water treatment facilities benefit from the probe's robust temperature rating and resistance to moisture ingress, enabling continuous vibration monitoring in humid, chemically aggressive environments without signal drift or calibration shift over extended service intervals.

Mining and Minerals Processing: In SAG mill drives, crusher gearboxes, and slurry pump trains, the 21000-16-05-00-090-04-02 provides the shaft proximity data required for condition-based maintenance scheduling, reducing unplanned downtime and extending mean time between overhauls in high-duty-cycle rotating equipment.

Marine and Offshore: Shipboard propulsion turbines and auxiliary machinery protection systems in offshore platforms deploy 21000-series probes in compliance with classification society requirements, with the probe's extended temperature range and vibration-resistant cable construction meeting the environmental demands of marine machinery spaces.

Q1: Is the 21000-16-05-00-090-04-02 directly compatible with the Bently Nevada 3500 Series monitor rack without additional signal conditioning? The 21000-16-05-00-090-04-02 proximity probe requires a matched 21000-series proximitor/driver module (such as the 21000-05-00-00-00) to condition the eddy-current signal before it enters the 3500 rack I/O module. The probe, extension cable, and proximitor together form a calibrated system; substituting non-matched components will affect sensitivity and linear range. NANKMOS supplies matched probe-and-driver sets and can advise on system-level compatibility for your specific rack configuration.

Q2: Can this probe be installed in a redundant monitoring architecture, and what additional components are required? Yes. Redundant proximity monitoring is achieved by installing two probe sets at each bearing location — typically at 90° X–Y orientation — each connected to independent proximitor modules and separate 3500 rack channels. The 3500/32 relay module can be configured to execute OR or AND trip logic across redundant channels, ensuring that a single probe or cable fault does not cause a spurious trip while maintaining full protection integrity. NANKMOS can supply matched redundant probe pairs with consistent calibration certificates.

Q3: What warranty and post-delivery support does NANKMOS provide for the 21000-16-05-00-090-04-02? All 21000-16-05-00-090-04-02 units supplied by NANKMOS are covered by a 12-Month Warranty from the date of shipment, covering manufacturing defects and calibration conformance. Each unit undergoes pre-shipment functional testing and is supplied with a calibration data sheet. NANKMOS maintains in-stock inventory for rapid dispatch, with standard lead times of 3–5 business days. For engineering support on system integration, installation, or long-term maintenance planning, contact our technical team at [email protected] or +86 18359268345.