Bently Nevada 330525 Velomitor XA

Fits harsh or outdoor casing-velocity points that need a ruggedized integrating piezo-velocity sensor without a housing — 3.94 mV/mm/s, 4.5–2000 Hz (±3 dB), operating −55 to +121 °C, IP65/NEMA 4X when properly cabled.

Key advantages

Range / sensitivity — Velocity range 1270 mm/s (50 in/s) peak; Sensitivity 3.94 mV/mm/s (100 mV/in/s) ±5%; amplitude linearity ±2% to 152 mm/s (6 in/s) peak.
Frequency — 4.5–2000 Hz ±3.0 dB; 6.0–1000 Hz ±0.9 dB.
Environment — Operating −55 to +121 °C (−67 to +250 °F); IP65 / NEMA 4X when properly installed with mating extension cable; hermetically sealed case.
Supply — DC −22 to −30 VDC; bias current 2.5–6.0 mA (per OEM DS).
Construction — 316L stainless steel; Ø28 mm × 73.1 mm; weight 156 g typical; weatherproof connector/cable for un-housed install.

Typical applications

Outdoor or washdown casing vibration mounts without a separate sensor housing.
Broader-band velocity (to 2 kHz ±3 dB) where CT Velomitor bandwidth is too narrow.
Points needing −55…+121 °C operating temperature and hermetic 316L case.
Loops with −22…−30 VDC / 2.5–6.0 mA bias-current excitation per OEM datasheet.

Selection guide

Sensitivity / linearity — 3.94 mV/mm/s ±5%; linearity ±2% to 152 mm/s (6 in/s) peak.
Connector — 2-pin Mil-C-26482 hermetic, 316L shell; max cable 305 m PN 02173007.
Shock — 5000 g peak max.
Approvals — Multiple hazardous-area approvals (see OEM Approvals Quick Reference).
CT vs XA — Choose 190501 CT for cooling-tower/ACHX ≥90 rpm; choose 330525 XA for harsh/outdoor broader-band duty.

Common mistakes

Ordering CT when you need XA temperature/IP/bandwidth — XA is −55…+121 °C and 4.5–2000 Hz ±3 dB.
Ignoring proper mating extension cable — IP65/NEMA 4X requires correct weatherproof cable install.
Mismatching monitor excitation — supply is DC −22 to −30 VDC with 2.5–6.0 mA bias current.
Assuming 1270 mm/s peak is the linearity window — linearity is specified ±2% to 152 mm/s peak.

When to RFQ / what to tell us

Velocity range, frequency band, ambient/process temperature, and outdoor/washdown need.
Cable PN/length (max 305 m PN 02173007), hazardous-area approvals, monitor excitation compatibility.
Quantity, ship-to, mounting details.

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Specs

Spec	Value
SKU	44338
Brand	Bently Nevada
Model	330525 Velomitor XA
Product type	velocity_sensor
Measuring Range	Velocity range 1270 mm/s (50 in/s) peak
Accuracy	Sensitivity 3.94 mV/mm/s (100 mV/in/s) ±5%; amplitude linearity ±2% to 152 mm/s (6 in/s) peak
Output Signal	Piezo-velocity voltage; bias −12 ±3.0 VDC over temperature (referenced to Pin A); dynamic Z <2400 Ω
Supply Voltage	DC −22 to −30 VDC; bias current 2.5–6.0 mA (per OEM DS)
Ip Rating	IP65 / NEMA 4X when properly installed with mating extension cable; hermetically sealed case
Ambient Temperature	Operating −55 to +121 °C (−67 to +250 °F)
Sensor Type	Ruggedized Velomitor XA integrating piezo-velocity sensor for harsh/outdoor mounting without housing
Frequency Response	4.5–2000 Hz ±3.0 dB; 6.0–1000 Hz ±0.9 dB
Shock	5000 g peak max
Case Material	316L stainless steel
Electrical Connection	2-pin Mil-C-26482 hermetic, 316L shell; max cable 305 m PN 02173007
Mounting	Ø28 mm × 73.1 mm; weight 156 g typical; weatherproof connector/cable for un-housed install
Approvals	Multiple hazardous-area approvals (see OEM Approvals Quick Reference)
Notes	OEM Bently Nevada / Baker Hughes DS 141633 Rev. M.

Documents

Bently Nevada 330525 Velomitor XA datasheet (PDF)

FAQ

Q: What excitation does XA need? A: DC −22 to −30 VDC with bias current 2.5–6.0 mA per OEM datasheet; bias −12 ±3.0 VDC over temperature (ref. Pin A).

Q: IP rating? A: IP65 / NEMA 4X when properly installed with mating extension cable; hermetically sealed case.

Q: What should I send for a quote? A: Band/temperature/IP need, cable length, Ex, quantity. Compatible with systems using Bently Nevada 330525 XA — we do not claim authorized-dealer status.