Bently Nevada 330400 Series Accelerometer Three-Wire Piezoelectric in stock

330400 Series strictly adheres to the American Petroleum Institute (API) 670 standard and is renowned for its high reliability, wide frequency response, and rugged industrial design. It is widely used in industries such as petrochemical, power generation, and metallurgy.

The following is a detailed introduction to this series:

1. Key Features & Technical Advantages

Designed for Critical Machinery: Primarily used for high-frequency vibration monitoring such as gear mesh and blade pass frequencies. Also suitable for casing vibration measurement on fans, pumps, reciprocating compressors, and other equipment.

Rugged and Durable: Features a 316L stainless steel housing with a hermetic seal. The sensor itself has an IP68 equivalent protection rating, resisting moisture, dust, and corrosive environments.

Wide Frequency Response & High Sensitivity: Provides 100 mV/g sensitivity and a 50 g measurement range, effectively capturing vibration signals from low to high frequencies.

Easy Installation: Mounts via a 1/4-28 UNF or M8x1 threaded hole on the base. Features a standard 3-pin MIL-C-5015 military connector on the top for reliable connection.

2. Detailed Technical Specifications

Parameter Specification

Sensitivity10.2 mV/m/s² (100 mV/g) ±5%

Measurement Range±490 m/s² (±50 g) peak

Frequency Response ±3 dB: 10 Hz to 15 kHz (600 to 900,000 cpm)<br>±10%: 30 Hz to 10 kHz (1,800 to 600,000 cpm)

Mounting Resonant Frequency>30 kHz

Non-linearity±1% up to 50g

Residual Noise0.004 g rms (10 Hz to 20 kHz)

Power Requirement-24 ± 0.5 Vdc, 2 mA bias current

Bias Voltage-8.5 ± 0.5 Vdc

Operating Temperature-55°C to +121°C

Shock Limit5000 g peak

Housing Material316L Stainless Steel

WeightApprox. 100 grams

Maximum Cable Length305 meters (no signal attenuation)

3. Model Number Breakdown

The model numbers follow the coding scheme below, allowing users to select the appropriate thread and certification:

Code Position Option Meaning

AA (Mounting Thread)`01` 1/4-28 UNF Imperial Thread

`02` M8×1 Metric Thread

BB (Certification Option)`00` No Hazardous Area Certification

`05` Multiple International Certifications (for hazardous areas in North America, Europe, etc.)

`CN` China Certification (NEPSI/CCC), for hazardous areas in China

Examples:

330400-01-05: Imperial thread, International hazardous area certification

330400-02-CN: Metric thread, China hazardous area certification

330400-01-00

330400-02-00

330400-02-05

4. Related Model Comparison: 330400 vs. 330425

This series also includes an extended model, the 330425. Both models are identical in appearance and electrical characteristics, with the main differences being range and sensitivity.

Model Sensitivity Range Application Scenario

330400 100 mV/g 50 g General-purpose vibration monitoring for most machinery (e.g., standard fans, pumps) for fault diagnosis.

330425 25 mV/g 75 g High vibration energy machinery, such as large gearboxes or reciprocating compressors, to prevent signal clipping under high vibration levels.

5. System Integration & Application

Compatible Monitors: Typically used with Bently Nevada monitors such as the 3500/42M, 1900/65A, or 2300/20 to form a complete machinery protection system.

Dedicated Cables: Requires dedicated Bently Nevada cables (e.g., 16925, 16710 series) to ensure signal transmission and system performance.

The Bently Nevada 330400 series is a mature and reliable industrial accelerometer, suitable for vibration monitoring on critical machinery where high reliability is paramount. Its key advantages are its wide frequency response, rugged mechanical design, and flexible configuration options.