Bently Nevada 330400-01-05 – Piezo‑Velocity Sensor for Reliable Casing Vibration Monitoring

The Bently Nevada 330400-01-05 is a robust Velomitor-type velocity transducer designed for long-term casing vibration measurements on rotating machinery. From my experience, this model hits the sweet spot for pumps, fans, compressors, and small turbines where true velocity output simplifies trending and alarm setup. The “-01” typically denotes a top‑exit integral cable, and “-05” usually indicates a 5 m cable length—handy when mounting space is tight or the junction box sits a little farther away.

Order Placement Process & Guarantees

• Warranty: 365 days
• Delivery: 1 week if in stock; no more than 1 month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• True velocity output (IEPE type): Provides a dynamic voltage proportional to mm/s or in/s, so you get actionable casing vibration data without external integrators.
• Sensitivity around 100 mV/in/s (typical): A widely used scaling that makes it easy to set alarms and compare across machines.
• Wide frequency response: Typically covers the 4.5 Hz to 5 kHz range, helping catch unbalance, looseness, and certain bearing issues.
• Rugged, sealed construction: Stainless steel body with a hermetically sealed design for harsh industrial environments; you might notice fewer drift issues in humid areas.
• Top‑exit 5 m integral cable: The -01-05 configuration usually ships with a top‑exit leadout and a 5 m cable—clean routing in compact skids.
• Drop‑in with common monitors: In many cases compatible with IEPE/accelerometer inputs on plant monitors and handheld data collectors (including Bently Nevada 3500 vibration channels configured for velocity).

Technical Specifications

Application Fields

The 330400-01-05 is typically applied on rotating assets where casing velocity trends are the go-to indicator:

• Pumps and fans (cooling towers, boiler feeds, circulation units)
• Compressors and blowers (general process gas, air handling)
• Small to mid-size motors and gearboxes (bearing housings, pedestals)
• Steam and gas turbine auxiliaries (lube oil pumps, turning gear drives)

A maintenance lead recently told us, “Swapping to velocity sensors on the pump casings made our alarms far less noisy. With the 5 m top-exit lead, routing was painless on our skid frames.” That seems to be a common pattern—clean installs tend to produce cleaner data.

Advantages & Value

• Reliability in harsh areas: Hermetic stainless design stands up well to moisture and oil mist, reducing drift and intermittent faults.
• Compatibility: Works with most IEPE inputs and commonly integrates into Bently Nevada monitoring racks and many portable analyzers.
• Cost-effective velocity measurement: Direct velocity output often means fewer signal conditioners and quicker commissioning.
• Support & spares: We can supply mounting studs, pads, junction boxes, and protective conduits to match your site standards.

Installation & Maintenance

• Mounting surface: Use a flat, clean, and rigid spot on the bearing housing or case. A machining pad or epoxy mounting pad helps when surfaces are uneven.
• Stud torque: Tighten the 1/4‑28 UNF stud to manufacturer-recommended torque (commonly around 2–6 N·m). Avoid over‑torque that could detune the response.
• Cable routing: Route the integral cable away from high-voltage lines and hot surfaces; secure every 20–30 cm to prevent fretting.
• Grounding and shielding: Follow single‑point grounding practices for IEPE sensors to minimize electrical noise.
• Routine checks: Verify bias voltage and dynamic response during outages; re-calibration every 1–2 years is typical for critical services.
• Environmental care: Wipe the housing clean; inspect cable jackets and glands for aging or mechanical damage, especially near bends.

Quality & Certifications

• Manufactured under ISO 9001 quality systems (typical for Bently Nevada production)
• CE and RoHS conformity commonly available for industrial sensors of this type
• Warranty: 365 days (our supply policy)

Supporting Components (Optional)

• 1/4‑28 UNF mounting studs and stainless mounting pads
• Magnetic mounting bases for temporary route-based measurements
• Weatherproof junction boxes and conduit/flexible armor for cable protection

If your site needs a mix of cable lengths or different leadout orientations, we can check availability for adjacent options within the 330400 series. Sharing your monitor model and channel configuration helps us confirm the best match quickly.