Bently Nevada 330525-00 Velomitor™ XA Piezo-velocity Sensor

The 330525-00 is a piezo-velocity sensor from Bently Nevada's Velomitor™ XA (eXtended Application) series. It is a ruggedized version of the 330500 Velomitor sensor, specifically designed to measure absolute casing vibration on rotating machinery operating in harsh industrial environments such as those with high moisture and dust.

The core feature of this model is its 316L stainless steel housing and unique weatherproof connector and cable assembly, which allows direct installation without an additional protective housing — simplifying field deployment.

Model Number Breakdown

Code Position Option Meaning

330525 – Velomitor XA Piezo-velocity Sensor Series

00 Certification No special certification requirements (suitable for non-hazardous areas)

Note: Other models in the same series include 330525-01 and 330525-02, each corresponding to different certification levels.

Detailed Technical Specifications

Parameter Specification

Sensitivity 3.94 mV/mm/s (100 mV/in/s) ±5%

Velocity Range 1270 mm/s (50 in/s) peak

Frequency Response (±3.0 dB) 4.5 Hz to 2,000 Hz (270 to 120,000 cpm)

Frequency Response (±0.9 dB) 6.0 Hz to 1,000 Hz (360 to 60,000 cpm)

Mounted Resonant Frequency > 12 kHz

Transverse Sensitivity < 5%

Amplitude Linearity ±2% up to 152 mm/s (6 in/s) peak

Broadband Noise Floor 0.004 mm/s (160 μin/s) rms (4.5 Hz to 2 kHz)

Output Bias Voltage -12 ± 3.0 VDC

Power Supply Requirement -22 to -30 VDC, bias current 2.5 to 6.0 mA

Dynamic Output Impedance < 2400 Ω

Operating Temperature -55°C to +121°C (-67°F to 250°F)

Shock Survivability 5000 g peak

Relative Humidity Up to 100% (non-submerged; case is hermetically sealed)

Compatible Monitors

Seamlessly integrates with Bently Nevada monitoring systems. Typical models include:

3500/42M

1900/65A

2300/20

Compatible Cable

Bently Nevada dedicated extension cables (e.g., 106765-33) are recommended. Maximum cable length can reach 305 meters (1,000 feet) .