Bently Nevada 330500-02-00 壳体振动速度传感器（Velomitor 压电式速度计）

Bently Nevada 330500-02-00 Shell Vibration Velocity Sensor (Velomitor Piezoelectric Speedometer)

1、 Product Introduction

Brand: Bently Nevada under Baker Hughes

Full name: 330500 Velomitor Integrated Piezoelectric Speed Sensor

Model suffix -02-00 meaning: 2-pin connector, no explosion-proof certification standard industrial Bentley

Purpose: To measure the absolute vibration velocity of bearing seats, equipment shells, and steel structures, used for monitoring the status of rotating machinery and protecting the unit, replacing old-fashioned magneto electric speed sensors

working principle

Built in piezoelectric ceramic crystal+dedicated integration circuit: vibration generates charges in the piezoelectric crystal, and the internal circuit directly converts them into voltage signals proportional to the vibration speed; Without moving parts such as springs and coils, there is no mechanical wear, and the lifespan is much better than traditional moving coil speed sensors. Installing at any angle does not affect accuracy

2、 Core technical parameters

1. Measurement performance

Standard sensitivity: 3.94 mV/mm/s (100 mV/in/s) ± 5%

Range: Peak 1270 mm/s (50 in/s)

Linearity: ≤± 2% (≤ 152 mm/s peak interval)

Lateral sensitivity:<5% (anti lateral interference)

Installation resonant frequency:>12kHz

Background noise: 0.004 mm/s rms (4.5Hz~5kHz)

2. Frequency response

Broadband mode: 4.5 Hz~5 kHz, ± 3dB (270~300000 rpm)

High precision mode: 6 Hz~2.5 kHz, ± 0.9dB (360~150000 rpm)

3. Electrical specifications

Power supply: DC 12~30V, working current ≤ 20mA

Output bias voltage: -12 ± 3VDC

Output dynamic impedance: ＜ 2400 Ω

Maximum supporting cable length: 305m (1000ft), recommended cable models 9571 (ordinary shielding), 84661 (armored shielding)

4. Machinery and Environment

Shell material: 316L stainless steel, corrosion-resistant

Size: Diameter 25.3mm, total length 66mm

Weight: 150g

Installation thread: 1/4-28 UNF, installation torque 4~7N · m

Working temperature: -55 ℃~+121 ℃

Impact resistance: 1000g peak, short-term tolerance

Protection: Sealed body, suitable for outdoor/oil, water and gas industrial environments

3、 Product advantages

Omnidirectional installation: installed at any angle, including vertical, horizontal, and inclined, without any installation orientation restrictions

Maintenance free and long-lasting: Solid state piezoelectric structure with no easily worn mechanical components

Wide temperature and frequency range: covering the full speed vibration frequency range of fans, motors, compressors, and steam turbines

Long distance cabling: up to 305 meters of cable with no signal attenuation, suitable for long-distance measurement points of large units

Shell isolation design: The shell is isolated from the signal ground to suppress on-site ground loop interference

4、 Typical application scenarios

Monitoring of shell tile vibration of rotating equipment in thermal power/petrochemical/metallurgical industries:

Bearing seat for steam turbine and gas turbine

Air compressor, reciprocating compressor housing

Large fan, induced draft fan, motor, gearbox

Water pump, booster, rolling mill frame

Applicable systems: Bentley 3500 monitoring framework, 1900/65A vibration monitor, third-party DCS/PLC vibration acquisition module Bentley

5、 Differentiation of models within the same series

330500-02-00: Standard 2-pin, ordinary industrial environment, no explosion-proof certification

330500-02-04: 2-pin, multi explosion-proof certification (Ex ia), used in hazardous chemical explosion-proof areas

330525: Velomitor XA reinforced type, IP65 waterproof and dustproof, designed for harsh outdoor scenarios

6、 Supporting accessories

Special cables: 9571 (ordinary shielding), 84661 (armored shielding)

Install the base and M8 conversion threaded joint

21128 Sensor Outdoor Protective Shell Component

3500/42M, 1900/65A speed monitoring module