330500-04-04 Velomitor Piezo-velocity Sensor

Overview

Place of Origin:	USA
Brand Name:	Bently Nevada
Model Number:	330500-04-04
Minimum Order Quantity:	1
Packaging Details:	Original new Factory Sealed
Delivery Time:	5-7 days
Payment Terms:	T/T
Supply Ability:	In stock

Quick Detail

Description

The 330500-04-04 Velomitor Piezo-velocity Sensor is a state-of-the-art seismic transducer designed by Bently Nevada to provide precision measurement of absolute casing vibration. Unlike traditional moving-coil velocity sensors, the 330500-04-04 Velomitor Piezo-velocity Sensor utilizes advanced piezoelectric technology coupled with integrated solid-state electronics. This design allows the Velomitor Piezo-velocity Sensor to convert high-frequency acceleration signals into an accurate velocity output internally, delivering a standard 100 mV/in/s (3.94 mV/mm/s) signal that is highly resistant to industrial noise. By eliminating all moving mechanical parts, the 330500-04-04 model completely avoids the friction, stiction, and wear-related degradation that typically plague older electro-mechanical sensors.

The rugged construction of the 330500-04-04 Velomitor Piezo-velocity Sensor makes it an essential tool for monitoring the health of rotating machinery in extreme environments. Encased in high-grade 316L stainless steel, this Velomitor Piezo-velocity Sensor provides superior resistance to corrosive chemicals, moisture, and mechanical impact. The sensor's compact profile, with an overall case length of 63.5 mm (2.5 in), allows for seamless installation in tight spaces where larger sensors cannot fit. Furthermore, the 330500-04-04 is engineered to maintain exceptional amplitude linearity of ±2% even at high vibration levels up to 152 mm/s peak, ensuring that critical data remains reliable during transient machinery events.

Applications

The 330500-04-04 Velomitor Piezo-velocity Sensor is extensively applied in the continuous vibration monitoring of bearing housings for large rotating equipment, such as steam turbines, centrifugal compressors, and heavy-duty motors. Its ability to measure absolute vibration velocity makes it the primary choice for detecting early-stage mechanical faults like rotor unbalance, shaft misalignment, and structural resonance. Because it is loop-powered and provides a high-level voltage signal, it integrates directly into plant-wide DCS or Bently Nevada 3500 racks to provide real-time machinery protection in power plants and refineries.

In harsh chemical and maritime environments, the 330500-04-04 excels due to its 316L stainless steel housing and hermetic sealing. It is frequently used to monitor cooling tower fans, auxiliary pumps, and gearboxes where exposure to corrosive mists and high humidity is constant. The sensor's wide operating temperature range (-55°C to 121°C) allows it to be installed on outdoor equipment in arctic climates or high-temperature industrial ovens, providing consistent velocity data without the need for additional heat shields or environmental enclosures.

Specifications

Competitive Advantage

1. Solid-State Durability & Maintenance-Free Operation

The 330500-04-04 features a unique piezoelectric design that contains zero moving parts, unlike traditional mechanical velocity sensors. This solid-state architecture eliminates the risk of internal component wear or "hang-up" due to friction, resulting in a significantly longer service life and reduced calibration frequency. This makes it the most cost-effective solution for high-vibration applications where traditional sensors frequently fail.

2. Exceptional Signal Precision and Linearity

With a sensitivity of 3.94 mV/mm/s (100 mV/in/s) and an amplitude linearity of ±2% up to 152 mm/s (6 in/s) peak, the 330500-04-04 provides unmatched measurement accuracy. Its low dynamic output impedance (less than 2400 Ω) ensures stable signal transmission over long cable runs, preventing data loss or interference. This precision allows maintenance teams to distinguish between minor process noise and genuine mechanical defects with high confidence.

3. All-Weather 316L Stainless Steel Construction

While many competitors use standard aluminum or 303 steel, the 330500-04-04 is constructed from premium 316L stainless steel. This provides maximum protection against salt spray, corrosive gasses, and acidic environments. Combined with its wide thermal tolerance down to -55°C, this sensor is engineered to survive in the world’s most demanding industrial landscapes, from offshore oil platforms to high-heat petrochemical processing units.