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      3300 High Temperature Velomitor velocity sensor system

      330750-80-05

      Product Information:

      The 330750-80-05 is a 3300 High Temperature Velomitor velocity sensor system specifically designed for vibration monitoring on casings in extremely harsh "hot-section" environments; it is primarily used to acquire absolute casing vibration signals from critical equipment such as the turbine sections of heavy-duty industrial gas turbines, steam turbine exhaust casings, and high-temperature industrial fans.

      • One-year warranty
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        • PRODUCT OVERVIEW

          What is this product?

          The Bently Nevada 330750-80-05 is a high-temperature Velomitor system—a vibration monitoring sensor designed for operating conditions where standard vibration sensors cannot withstand the equipment's surface temperature. According to Bently Nevada's product specifications, the 330750 and 330752 high-temperature Velomitor systems feature an integrated probe and cable design, making them suitable for installation on surfaces with temperatures up to +400°C (+752°F).

          Source boundary

          Exact-model hardware values shown here are qualified from public technical cross-references and require order-stage confirmation.
        • APPLICATIONS

          Where it may be used

          Applications describe the product family and are not an automatic compatibility or functional-safety approval.

          Gas Turbines

          Suitable for vibration monitoring on high-temperature rotating machinery where the sensor installation point can reach temperatures beyond the capability of conventional vibration transducers.

          Steam Turbines

          Can be applied to turbine machinery requiring vibration measurements in elevated-temperature areas while maintaining the sensing element at the machine surface.

          Power Generation

          SSupports condition-monitoring applications on critical rotating equipment where high-temperature operation makes specialized vibration instrumentation necessary.

          Industrial Machinery

          Provides vibration measurement for rotating equipment installed in harsh thermal environments where an integral high-temperature sensor cable helps simplify the sensing arrangement.
      Technical specifications for

      330750-80-05

      0 TECHNICAL PARAMETERS
      • Manufacturer:
        Bently Nevada
      • Product Category:
        Sensor
      • Length:
        8 metres
      • Approvals:
        Multiple Approvals (CSA, ATEX, and IECEx)
      • Sensitivity:
        5.7 mV/mm/s (145 mV/in/s) ±5%
      • Transient Temperature Sensitivity:
        0.0762 mm/s/°C (0.003 in/s/°C)
      • Transverse sensitivity:
        Less than 5% of Sensitivity
      • Mounted resonant frequency:
        Greater than 5 kHz
      • Broadband Noise floor (15Hz to 2kHz):
        0.127 mm/s (0.005 in/s) rms nominal
      • Stock Availability:
        4
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      Alternative Names

      3307508005 330750 80 05

      Information

      Overview Manuals Mechanical Construction Hazardous-Area Configuration

      Features:

      • Designed for sensing-head mounting surfaces up to +400°C.
      • Separates the sensing point from the signal-conditioning electronics.
      • 05 configuration includes CSA, ATEX, and IECEx approvals.
      The Bently Nevada 330750-80-05 is an 8 m High Temperature Velomitor System designed for vibration monitoring in applications where conventional velocity sensors cannot tolerate the temperature at the machine mounting location. The sensing element and signal-conditioning electronics are separated and permanently connected by an integrated cable, eliminating a connector that could otherwise become a potential failure point.

      The sensor provides a nominal sensitivity of 5.7 mV/mm/s (145 mV/in/s) ±5% and supports a frequency response extending to 2000 Hz. The current 330750/330752 design supports sensing-head and integral-cable temperatures up to +400°C, while the electronics are rated up to +121°C; current versions rated for +400°C are identified by a serial number beginning with “G”.

      The 330750-80-05 Bently Nevada High Temperature Velomitor System may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
      Bently Nevada 330750-80-05 High Temperature Velomitor System 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.
      The sensing head uses a 300-series stainless-steel case, while the electronics-side connector is a 2-pin MIL-C-5015 hermetically sealed receptacle with a 304 stainless-steel shell. The minimum cable bend radius is 51 mm (2.0 in).
      The -05 ordering option specifies Multiple Approvals, including CSA, ATEX, and IECEx. The official datasheet provides hazardous-area requirements including entity parameters and installation conditions; the complete installation must comply with the applicable certification requirements.

      Technical notes

      The system employs an innovative fail-safe design that separates the sensor probe from the signal conditioning electronics and utilizes an integral hard-wired cable with a permanently welded, sealed connection; this design fundamentally eliminates single-point failures caused by connector aging or loosening in high-temperature environments. In terms of specifications, the "330750"—serving as the base model for this high-temperature velocity sensor system—offers a standard electrical sensitivity of 5.7 mV/mm/s (145 mV/in/s) ±5% and a frequency response range of 15 Hz to 2000 Hz.

      Extreme-Temperature Velocity Measurement

      The Bently Nevada 330750-80-05 is a High Temperature Velomitor System designed to measure machine vibration velocity where the sensor mounting surface can reach +400°C (752°F). Its sensing element is separated from the signal-conditioning electronics, allowing the electronics to be installed in a substantially cooler location while the sensing head and integral hardline cable remain in the high-temperature zone.

      Integrated High-Heat Signal Path

      The 330750-80-05 uses an 8 m integral cable and a permanently connected sensing head/electronics arrangement, eliminating an intermediate connector between the sensing element and signal-conditioning electronics. The sensor provides 5.7 mV/mm/s (145 mV/in/s) ±5% sensitivity with a frequency response of 15–2000 Hz ±3.0 dB or 20–1000 Hz ±0.9 dB.

      Customs & shipping dimensions / weight

      • Packed shipping dimensions
        Confirmed after final packing
        Exact product dimensions are not stated in the reviewed model-specific source.
      • Packed shipping weight
        Confirmed after final packing
        Exact product dimensions are not stated in the reviewed model-specific source.
      • HS / customs code
        Not officially confirmed
        Verify the applicable code for the destination before shipment.
      • Country of origin
        USA
        Verify from the item nameplate or COO.
      • Ships from
        Xiamen, Fujian, China
        Dispatch location is confirmed in the written quotation.
      • Customs documents
        Confirmed for the destination
        Available document scope is stated in the written quotation.
      PRODUCT & ORDER FAQS

      Questions buyers ask about 330750-80-05

      • What exactly is the Bently Nevada 330750-80-05 configuration?

        The 330750-80-05 is a Bently Nevada High Temperature Velomitor System. The manufacturer’s ordering structure identifies 80 as the 8-meter integral cable length and 05 as the Multiple Approvals configuration, covering CSA, ATEX, and IECEx approvals. Unlike a conventional vibration sensor with a separate signal-conditioning arrangement, the 330750 design uses an integrated cable to permanently connect the sensing element and electronics, allowing the electronics to be positioned away from the hottest machine surface.

      • Can this 8 m Velomitor be connected to an existing Bently Nevada vibration-monitoring installation?

        Yes, but the complete signal chain must be checked rather than treating the 330750 as a generic velocity sensor. Bently Nevada specifies a two-conductor cable for the Velomitor and recommends double-shielded cabling to reduce noise interference. The 330750 also uses a 2-pin Mil-C-5015 hermetically sealed receptacle, and the datasheet lists compatible interconnect options such as the 9571-NN and 84661-NN cable families.

      • Where would an engineer choose the 330750 instead of a standard-temperature Velomitor?

        The main reason is the temperature at the sensor mounting point. The 330750 High Temperature Velomitor is intended for casing or bearing-housing vibration measurements where the sensing surface can reach +400°C (752°F). Bently Nevada states that the standard 330500 Velomitor is intended for lower-temperature locations up to +121°C, making the 330750 particularly relevant to high-temperature rotating machinery environments.

      • What installation details are important for the 330750-80-05?

        The sensing head should be mounted on the bearing housing or machine casing, because improper installation can reduce amplitude and frequency response or produce signals that do not represent actual machine vibration. The integral hardline cable has a minimum bend radius of 51 mm (2.0 in). The manufacturer also specifies protected outdoor installation with wiring in conduit where applicable. For installations above 260°C, Bently Nevada lists cable clamp 169546 for securing the hardline cable.

      • What performance should I expect from the 330750-80-05?

        At the manufacturer's reference conditions, the system provides 5.7 mV/mm/s (145 mV/in/s) sensitivity ±5%. Its frequency response is 15–2000 Hz at ±3.0 dB and 20–1000 Hz at ±0.9 dB. The amplitude range is 635 mm/s peak below 680 Hz and 2940 m/s² peak above 680 Hz. These specifications make the unit suitable for broadband casing-vibration measurements on demanding rotating machinery.

      • Does the 330750-80-05 remain suitable when the machine surface reaches 400°C?

        Yes. The current Bently Nevada datasheet specifies the sensing head and integral hardline cable from -55°C to +400°C, while the electronics are rated from -55°C to +121°C. The design separates the sensing element from the signal-conditioning electronics through the permanently integrated cable, allowing the electronics to be located in a cooler area. For current +400°C-rated units, Bently Nevada notes that the serial number is preceded by the letter “G”, so the serial number should be checked when the temperature rating is critical.

      • Can Moore Automated supply a new 330750-80-05 with supporting documentation and warranty?

        Yes. Moore Automated provides new and original products with a one-year warranty. For this specific 330750-80-05, we can check warehouse availability by exact part number and provide technical manuals and actual product photos for confirmation. Available documentation may include COO, COC, test reports, calibration certificates, and a warranty letter; where applicable, requested certificates can be packed together with the shipment.

      • What are the purchasing and delivery options for this high-temperature Velomitor?

        If you are ready to purchase, send us your required quantity and target price so we can efficiently check whether a special discount can be obtained. Moore Automated is not an authorized Bently Nevada agent, but supplies products of the same branded part-number specification. For international delivery, DHL and FedEx door-to-door service are supported, allowing the 330750-80-05 to be shipped directly to the customer's receiving location.
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          Moore Disclaimer: Moore Automated's sales automation equipment and related solutions are intended for industrial automation and business operational efficiency improvement purposes only. Product information, technical parameters, and application cases are for reference only and do not constitute an absolute guarantee of performance for any specific industry, scenario, or final application. Actual equipment performance may vary depending on factors such as the usage environment, system integration method, and maintenance conditions. Users should confirm compatibility and safety based on professional technical assessments. Moore Automated assumes no liability for any direct or indirect losses caused by improper use, modification, or failure to operate according to specifications, to the extent permitted by law.

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