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330750-40-05

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Bently Nevada 330750-40-05 is a high temperature velomitor sensor featuring a separated sensing head and electronics arrangement for reliable machinery vibration monitoring in extreme thermal conditions.
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Technical specifications for 330750-40-05

  • Manufacturer:
    Bently Nevada
  • Part Number:
    330750-40-05
  • Product Family:
    330750 / 330752 High Temperature Velomitor System
  • Product Type:
    High Temperature Velomitor Sensor
  • Stock:
    1
  • Length:
    4 meters
  • Approvals:
    Multiple Approvals (CSA, ATEX, and IECEx)
  • Sensitivity:
    5.7 mV/mm/s (145 mV/in/s) ±5%
  • Transverse Sensitivity:
    Less than 5% of Sensitivity
  • Amplitude Linearity:
    ±2% to 152 mm/s (6 in/s) peak
  • Mounted Resonant Frequency:
    Greater than 5 kHz
  • Output Bias Voltage:
    -12 ±2.0 VDC
  • Sensing Head:
    Maximum mounted surface temperature -55°C to +400°C (-67°F to +752°F)
  • Integral Hardline Cable:
    -55°C to +400°C (-67°F to +752°F)
  • Electronics:
    -55°C to +121°C (-67°F to +250°F)
  • Shock Survivability:
    24,535 m/s2 (2500 g) peak
  • Relative Humidity:
    To 100% non-submerged; case is hermetically sealed.
  • Maximum Use Altitude:
    2000 meters (6561 ft) above sea level
  • Weight:
    0.7 kg
  • Estimated shipping dimensions:
    34x23x4cm
  • Tariff Code:
    3802101000
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Application Scenarios Efficiency Firmware

Features:

  • High-temperature sensing head and integral cable support installation on surfaces up to +400°C.
  • Integrated cable architecture eliminates intermediate connectors and enhances reliability.
  • Excellent vibration performance with 5.7 mV/mm/s sensitivity and mounted resonant frequency greater than 5 kHz.
High-temperature rotating machinery often requires vibration sensors capable of withstanding conditions beyond the limits of conventional devices. Bently Nevada 330750-40-05 addresses this requirement by using a remote electronics arrangement and a rugged sensing head. Such a design enables accurate vibration measurements on equipment operating at elevated temperatures.

The integrated cable permanently connects the sensing element to the signal conditioning electronics. This arrangement reduces connector-related failures and allows the electronics to be mounted in a cooler area. Bently Nevada 330750-40-05 captures machinery performance information comparable to standard Velomitor transducers while extending the temperature capability considerably.

Applications involving turbines, compressors, and other industrial machinery can benefit from the durability of Bently Nevada 330750-40-05. High shock resistance, hermetic sealing, and multiple international approvals contribute to dependable operation in challenging environments. With support for installation elevations up to 2000 meters, the sensor is suitable for a wide range of industrial monitoring systems.

The 330750-40-05 Bently Nevada High Temperature Velomitor Sensor may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 330750-40-05 High Temperature Velomitor Sensor Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Bently Nevada 330750-40-05 High Temperature Velomitor Sensor Specs

General

  • Manufacturer Bently Nevada
  • Model 330750-40-05
  • Condition New Original ready stock
  • Product Family 330750-20-05,330750-60-05,330750-80-05
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Gas turbine monitoring: Specifically designed for absolute velocity vibration measurement in the extreme high-temperature region of industrial gas turbine casings.
  • Steam protection: Used for high-temperature structural stress and vibration monitoring of valves in high-pressure superheated steam pipelines and unit bearing housings in power plants.
  • Blower monitoring: Used for high-frequency early mechanical defect warning of bearings in the core high-temperature induced draft fans and exhaust fans of metallurgical blast furnaces.
  • Cracking machine protection: Used for overall vibration monitoring of the casing of hydrogen-containing high-temperature rotating machinery such as ethylene cracking gas compressors in the petrochemical industry.
  • Response Efficiency: The core piezoelectric crystal possesses extremely high energy conversion efficiency to achieve instantaneous capture of weak vibration signals.
  • Maintenance Efficiency: The two-pin detachable aviation connector design significantly reduces downtime for field sensor replacements.
  • Diagnostic Efficiency: The highly integrated charge amplifier reduces processing latency to an extremely low level, improving the capture speed of abnormal frequency components.
  • Deployment Efficiency: The integrated threaded mounting structure allows for direct mounting and system operation without the need for secondary field calibration.
  • Hardware Version: The internal solidified circuitry uses a non-destructive ceramic substrate hardware physical architecture customized for high-temperature alternating environments.
  • Filtering Algorithm: A high-pass filter cutoff frequency is embedded in the hardware layer to effectively suppress low-frequency, high-amplitude thermal eddy current noise interference.
  • Zero-point calibration: Built-in fixed compensation coefficients ensure automatic zero-point locking even under continuous high-temperature fluctuations.
  • Framework compatibility: Signal output logic is fully compatible with the hardware channel sampling and impedance protocol of the 3500/42M monitoring module.
Description
Bently Nevada 330750-40-05 is engineered for applications where conventional vibration sensors cannot tolerate elevated temperatures. The sensing head and integral hardline cable are capable of operating from -55°C to +400°C, enabling installation directly on hot machine surfaces while maintaining dependable measurement performance.

Unlike earlier versions that were limited to +300°C, current versions identified by serial numbers beginning with the letter "G" support surface temperatures up to +400°C. The architecture of Bently Nevada 330750-40-05 separates the sensing element from the signal conditioning electronics, allowing the electronics section to be installed away from the hottest area of the machine.

A permanently attached 4-meter integrated cable connects the sensing head and electronics. By eliminating intermediate connectors, Bently Nevada 330750-40-05 reduces one of the common causes of transducer failures and improves long-term reliability. The internal electronics can withstand temperatures from -55°C to +121°C, providing flexibility when selecting mounting locations.

Bently Nevada 330750-40-05 delivers a sensitivity of 5.7 mV/mm/s (145 mV/in/s) ±5% and maintains amplitude linearity within ±2% up to 152 mm/s (6 in/s) peak. Transverse sensitivity remains below 5% of the nominal sensitivity, and the mounted resonant frequency exceeds 5 kHz for accurate vibration response.

The hermetically sealed case enables operation in environments with up to 100% relative humidity under non-submerged conditions. In addition, Bently Nevada 330750-40-05 offers excellent durability, surviving shock levels up to 24,535 m/s² (2500 g) peak and supporting installation elevations up to 2000 meters above sea level. The integrated design provides machinery performance data comparable to other Bently Nevada Velomitor transducers, but under significantly higher temperature conditions.
Alternative Names
33O75O-4O-O5 3307504005 330750-20-05 330750-60-05 330750-80-05 330752-25-CN 330752-25-05 330752-40-CN
Technical notes
The Bently Nevada 330750-40-05 is a high-temperature velomitor sensor with a 4.0-meter integral cable, engineered to deliver reliable 100 mV/in/s velocity output in extreme operating conditions up to 400°C.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What sensitivity does Bently Nevada 330750-40-05 provide?
Bently Nevada 330750-40-05 has a nominal sensitivity of 5.7 mV/mm/s (145 mV/in/s) with a tolerance of ±5%.
How does Bently Nevada 330750-40-05 improve reliability?
A permanently attached cable removes external connectors, which are a common source of transducer failures.
Can Bently Nevada 330750-40-05 operate in extremely hot environments?
Yes. The sensing head and hardline cable are rated from -55°C to +400°C, while the electronics section operates from -55°C to +121°C.
Does Bently Nevada 330750-40-05 tolerate harsh mechanical shocks?
The unit is capable of surviving peak shock levels of 24,535 m/s² (2500 g), making it suitable for demanding industrial conditions.

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