Bently Nevada 21000-16-05-00-055-03-02 Velocity Vibration Sensor

21000-16-05-00-055-03-02 — Stop the Clock on Your Downtime

Every minute a turbine or compressor sits idle, you’re bleeding money. Whether it’s a tripped vibration channel on a 3500 rack or a failed sensor on a steam turbine bearing housing, the 21000-16-05-00-055-03-02 is the exact drop-in replacement you need — and we have it on the shelf in Xiamen right now. No lead-time negotiation. No factory backorder. Just a verified, 100% original Bently Nevada 21000 Series velocity sensor packed and ready to move via DHL or FedEx express the same day your PO clears.

This is not a generic substitute. The 21000-16-05-00-055-03-02 is a factory-configured seismic velocity sensor with a 5.5 m pre-terminated cable (-055 suffix), specific connector termination (-02), and the standard 16 mm housing diameter (-16) that mates directly to your existing Bently Nevada 3500/42M or 3300 series monitor without any rack reconfiguration. If your plant runs Bently Nevada machinery protection, this is the part number you pull from the spare parts list — and if it’s not in your warehouse, it needs to be here.

URGENT REQUIREMENT? Contact: [email protected] | WhatsApp: +86 18359268345

Quick Technical Datasheet

Troubleshooting & Replacement Tips

After ten years of field work, the failure patterns on the 21000 Series are predictable. Here’s what you’re actually dealing with on-site:

Fault Code 3500/42M — High Vibration / Not OK: Before you condemn the sensor, check the rack first. Pull the I/O module and verify the channel is configured for velocity input, not acceleration. A misconfigured channel will throw a NOT OK even with a healthy sensor installed. If the rack checks out, swap the sensor and re-zero the baseline in System 1.

Intermittent Signal / Noise Spikes: Nine times out of ten this is the cable, not the sensing element. The -055 suffix gives you 5.5 m of factory-terminated cable — inspect the connector at the junction box end for fretting corrosion, especially on outdoor installations or anywhere with thermal cycling. Clean the connector pins with IPA and reseat before condemning the unit.

Zero Output / Dead Channel: The 21000 Series is a self-generating (passive) velocity sensor — it requires no external power. If you’re reading zero volts at the monitor input, the sensing coil has likely failed due to mechanical shock or overtemperature exposure. This is a replace-only scenario; the element is not field-serviceable.

Replacement Procedure (3500 Rack, Hot-Swap):

1. Inhibit the channel in the 3500 rack software to suppress spurious alarms during swap.
2. Disconnect the cable at the junction box — do not pull from the sensor body.
3. Unthread the sensor from the bearing housing stud mount (typically 1/4-28 UNF or M8 — confirm your installation).
4. Install the 21000-16-05-00-055-03-02 and torque to OEM spec (do not over-torque; the housing is aluminum).
5. Route the 5.5 m cable with a minimum bend radius of 50 mm; avoid sharp bends at the sensor exit point.
6. Reconnect at the junction box, verify connector seating, and re-enable the channel.
7. Confirm baseline vibration reading in System 1 matches pre-failure trend data before releasing the machine.

No dip-switch settings or firmware matching required — the 21000 Series is a passive analog sensor. All configuration lives in the 3500 rack, not the sensor itself.

Reliability in Harsh Conditions

The 21000-16-05-00-055-03-02 is built for the environments that destroy lesser sensors. The IP67-rated housing keeps moisture and particulate contamination out of the sensing element — critical for outdoor installations on cooling tower fans, offshore platform compressors, and any application where washdown or condensation is routine. The operating temperature ceiling of 121°C covers the vast majority of steam turbine bearing housing applications without requiring a standoff or heat shield.

Vibration immunity is inherent in the design: the seismic mass and spring element are engineered to measure structural vibration, not be destroyed by it. The pre-terminated cable uses a strain-relief construction at the sensor exit point that resists the constant micro-flexing seen on reciprocating compressor frames. In field service, these sensors routinely run 5–8 years between replacements in well-maintained installations — the failures we see are almost always mechanical damage or overtemperature events, not wear-out.

Every unit we ship has passed visual and dimensional inspection against OEM drawings, functional continuity verification, and is packed in anti-static, tamper-evident packaging. Certificate of Conformance available on request.

Global Express Logistics

Our warehouse is in Xiamen, China — one of the country’s primary export hubs with direct DHL and FedEx gateway access. Here’s how a typical urgent order moves:

• Day 0 (Order Confirmed): PO received, unit pulled from shelf, export documentation prepared (commercial invoice, packing list, HS code 9031.80).
• Day 0–1 (Dispatch): Shipment handed to DHL Express or FedEx International Priority. Tracking number issued within 4 hours of pickup.
• Day 1–3 (Transit): Xiamen → destination. Typical transit times: Southeast Asia 1–2 days, Europe 2–3 days, North America 2–4 days, Middle East 2–3 days.
• Customs: We prepare complete export documentation to minimize customs clearance delays. For regulated industries, we can provide additional traceability documentation on request.

For plant shutdowns with a hard restart deadline, contact us on WhatsApp before placing the order — we’ll confirm stock, cut-off time for same-day dispatch, and the realistic delivery window to your site before you commit.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
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