Bently Nevada 330752-25 High-temperature vibration speed sensor

Product Description

Bently Nevada (Baker Hughes) 330752-25 is a Velomitor high-temperature velocity sensor of the 330752 series. It adopts a split design, where the sensing head and signal conditioning electronics are connected by an integral hardline cable. The suffix 25 stands for 2.5 meters integrated cable length. The sensing head can be mounted on equipment surfaces up to 400°C continuously, while the electronics are installed in cooler areas. It measures casing vibration velocity under high-temperature conditions and is compatible with Bently monitoring modules such as 3500/42 and 3300/55 for rotating machinery condition monitoring and early fault warning. It is widely used as spare parts for power and petrochemical units.

Specifications

• Brand: Bently Nevada
• Model: 330752-25
• Type: Velomitor High-Temperature Vibration Velocity Sensor
• Integrated Cable Length: 2.5 m
• Sensitivity: 5.7 mV/mm/s (145 mV/in/s), ±5%
• Frequency Response: 15Hz～2000Hz (±3.0dB); 20Hz～1000Hz (±0.9dB)
• Temperature Range: Sensing head & hard cable: -55℃ ~ +400℃; Signal conditioning unit: -55℃ ~ +121℃
• Max. Total Cable Length: 305 m (no signal degradation)
• Shock Resistance: 2500g peak
• Enclosure: Hermetically sealed, withstands 100% RH (not submersible)
• Approvals: Optional ATEX, IECEx, CSA hazardous area certifications
• Lifecycle Status: OEM spare part; new, refurbished and used units available

Application

Suitable for steam turbines, gas turbines, high-temperature fans, boiler auxiliary equipment, hot pumps, compressors and other high-temperature rotating machinery. It monitors casing vibration velocity and transmits vibration data to online monitoring & protection systems to detect unbalance, looseness, bearing defects and other mechanical faults. It supports equipment condition monitoring, fault diagnosis and unit protection, commonly used in thermal power, combined cycle power plants and petrochemical industries.

Similar Series Models

1. 330752-40: 330752 series, 4m integrated cable
2. 330752-60: 330752 series, 6m integrated cable
3. 330752-80: 330752 series, 8m integrated cable
4. 330750-20: 330750 high-temperature Velomitor sensor, 2m cable