Bently Nevada 330425-01-05 Accelerometer

Description

The 330425-01-05 is a high-frequency casing accelerometer designed for critical machinery monitoring applications, offering an amplitude range of 75 g peak and a sensitivity of 25 mV/g. This specific configuration features a 1/4-28 UNF integral mounting stud (Option 01) and includes international hazardous area approvals (Option 05: CSA, ATEX, IECEx). As a component of the 330400 series, it is engineered for permanent installation on bearing housings or machine casings to provide reliable vibration data, such as gear mesh monitoring, for protection systems. The transducer is built from 316L stainless steel and features a 3-pin MIL-C-5015 connector, ensuring durability in harsh industrial environments. Unlike the standard 330400 model which provides 100 mV/g sensitivity and a 50 g range, this 330425 unit is optimized for applications requiring a higher amplitude measurement range. Proper installation using the specified torque is required to maintain frequency response and signal integrity, typically in conjunction with Bently Nevada proximity transducer systems for a comprehensive machinery protection strategy.

Features

• Sensitivity: 25 mV/g (2.5 mV/m/s2) +/- 5%
• Amplitude range: 75 g peak (735 m/s2)
• Option 01: 1/4-28 UNF integral mounting stud
• Option 05: Agency approvals including CSA, ATEX, and IECEx
• Operating temperature range: -55 Celsius to +121 Celsius
• Hermetically sealed 316L stainless steel case (IP 68 equivalent)
• Frequency response: 10 Hz to 15 kHz (+/- 3 dB)
• Mounted resonant frequency: Greater than 30 kHz

Applications

• Critical rotating machinery protection
• Gear mesh monitoring
• Casing vibration measurement
• Bearing housing vibration analysis
• General industrial machinery diagnostics

Ordering Information

Option	Code	Description
Orderable Part Number	330425-01-05	330425 Accelerometer
A - Mounting Thread	01	1/4-28 UNF integral stud
B - Agency Approval	05	Multiple approvals (CSA, ATEX, IECEx)

Technical Specifications

Parameter	Specification
Manufacturer	Bently Nevada (Baker Hughes)
Model	330425
Sensitivity	25 mV/g (2.5 mV/m/s2) +/- 5%
Acceleration Range	75 g peak (735 m/s2)
Frequency Response	10 Hz to 15 kHz (+/- 3 dB)
Amplitude Linearity	+/- 1% to 735 m/s2
Temperature Range	-55 Celsius to +121 Celsius
Material	316L stainless steel
Connector	3-pin MIL-C-5015 Receptacle
Weight	100 g (3.5 oz)
IP Rating	IP 68
Mounting Torque	4.1 N-m (3.0 ft-lb)

Installation Guidelines

• Install directly on the bearing housing or machine casing for effective vibration transmission.
• Use the specified mounting torque of 4.1 N-m (3.0 ft-lb) to ensure optimal frequency response.
• Ensure the mating connector provides IP54 ingress protection or better in hazardous area installations.
• Protect wiring in conduit; splash boots may be used for additional environmental protection.
• Connect only to equipment meeting the defined entity parameters for hazardous areas.