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190501-09-00-04

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Bently Nevada 190501-09-00-04 is a Velomitor CT velocity transducer for measuring low-frequency casing vibration on cooling-tower and air-cooled heat-exchanger fan assemblies.
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Technical specifications for 190501-09-00-04

  • Manufacturer:
    Bently Nevada
  • Part Number:
    190501-09-00-04
  • Product Family:
    190501 Velomitor CT Transducer
  • Product Type:
    Velomitor CT Velocity Transducer
  • Stock:
    1
  • Mounting Hardware Option:
    09, plate stud 3/8-24 to 1/4-in NPT
  • Connection Option:
    00, MIL-C-5015 connection interface
  • Agency Approval Option:
    04, CSA/NRTL/C (Class I, Division 1); ATEX/IECEx/CSA (Class I, Zone 0/1)
  • Sensitivity:
    3.94 mV/mm/s (100 mV/in/s) ±5%
  • Frequency Response:
    3.0 to 900 Hz ±1.0 dB; 1.5 Hz to 1.0 kHz ±3.0 dB
  • Velocity Range:
    63.5 mm/s peak (2.5 in/s peak)
  • Amplitude Linearity:
    ±2% to 63.5 mm/s peak
  • Transverse Response:
    Less than 5% of axial sensitivity
  • Output Bias Voltage:
    10.1 V DC ±1.0 V DC
  • Dynamic Output Impedance:
    Less than 400 ohms typical
  • Maximum Cable Length:
    305 m (1,000 ft)
  • Operating Temperature:
    -40 to +85 deg C
  • Storage Temperature:
    -40 to +100 deg C
  • Case Material:
    316L stainless steel
  • Connector:
    2-pin 316L stainless steel MIL-C-5015, top
  • Mounting Torque:
    4.5 N-m ±0.6 N-m
  • Mounting Orientation:
    Any orientation
  • Weight:
    0.655 lbs (0.297 kg)
  • Tariff Code:
    9031809090
  • 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 Signal Output Mounting Environmental Limits Approval Option

Features:

  • The low-frequency response reaches 1.5 Hz within the wider ±3.0 dB band.
  • A 316L stainless-steel body houses the sensor, connector, and isolated electronics.
  • Option 09 supplies a plate stud that changes from 3/8-24 at the transducer to 1/4-inch NPT at the machine.
The Velomitor CT design follows the vibration generated by the fan, motor, and speed reducer rather than measuring rotational speed directly.

Its internal conditioning produces a velocity-proportional signal with a 10.1 V DC nominal bias for the connected monitoring channel.

The sensor body can be mounted in any orientation, while the mounting surface and stud must transmit casing motion without looseness.

The Bently Nevada 190501-09-00-04 Velomitor CT Velocity Transducer may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 190501-09-00-04 Velomitor CT Velocity Transducer 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.

Velocity Signal Characteristics

  • Sensitivity path: Casing velocity is converted at 3.94 mV/mm/s with a ±5% tolerance.
  • Bias reference: The monitoring loop sees a nominal 10.1 V DC output bias between pins A and B.
  • Directional polarity: Pin A becomes positive relative to pin B for motion from the base toward the sensor top.
  • Cable reach: Approved field cable can extend to 305 m without specified signal degradation.

Mechanical Coupling to the Machine

  • Machine thread: The option 09 plate stud terminates in a 1/4-inch NPT connection.
  • Sensor thread: The transducer side of the plate stud uses a 3/8-24 interface.
  • Torque control: The documented transducer mounting torque is 4.5 N-m with a ±0.6 N-m tolerance.
  • Measurement surface: The mounting point belongs on the bearing housing or machine casing that carries rotor vibration.

Temperature and Exposure Boundaries

  • Operating range: The transducer operates from -40 to +85 deg C.
  • Storage range: The unpowered storage boundary extends from -40 to +100 deg C.
  • Humidity: The housing is rated for 100% condensing humidity but not submersion.
  • Shock limit: The documented maximum shock is 5,000 g peak.

Selected Connection and Certification Codes

  • Code 04: The final suffix selects the documented agency-approval group.
  • Division marking: The approval group includes CSA/NRTL/C coverage for Class I, Division 1.
  • Zone marking: ATEX, IECEx, and CSA entries cover the documented Class I Zone 0/1 configurations.
  • Electrical interface: Connection option 00 retains the MIL-C-5015 interface rather than the integral-cable option.
Description
Bently Nevada 190501-09-00-04 is a Velomitor CT velocity transducer that converts low-frequency casing motion from cooling-tower and air-cooled heat-exchanger fan assemblies into a velocity signal for machinery monitoring.

The option 09 plate stud places 190501-09-00-04 on a 1/4-inch NPT mounting point through a 3/8-24 transducer interface, so vibration must pass from the bearing housing or machine casing through the stud into the sensing body.

Signal wiring leaves 190501-09-00-04 through its two-pin MIL-C-5015 connector, with pin A moving positive relative to pin B when velocity is directed from the base toward the top of the transducer.

Inside 190501-09-00-04, the integrated piezoelectric sensing and conditioning stages provide a 100 mV/in/s velocity output while preserving response down to 1.5 Hz for the documented low-speed fan range.
Alternative Names
190501090004 190501 09 00 04 190501-09 00-04 Bently Nevada 190501-09-00-04 190501-09-00-04 Velomitor CT 190501-09-00-04 Velocity Transducer I90501-09-00-04 1905O1-O9-OO-O4
Technical notes
Bently Nevada 190501-09-00-04 combines a low-frequency Velomitor CT sensor, option 09 plate stud, MIL-C-5015 connection, and agency approval option 04.
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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.
Which mounting hardware is encoded in 190501-09-00-04?
The 09 option in 190501-09-00-04 selects a plate stud with a 3/8-24 transducer thread and a 1/4-inch NPT machine connection.
Why is 190501-09-00-04 intended for low-speed fan measurements?
The response of 190501-09-00-04 extends to 1.5 Hz within the ±3.0 dB band, covering vibration from fan assemblies operating from 90 rpm upward.
Where should the 190501-09-00-04 sensing body be attached?
Install 190501-09-00-04 on the bearing housing or machine casing so rotor vibration is transmitted continuously to its mounting surface.
Does 190501-09-00-04 use an integral 32-foot cable?
No. Connection option 00 in 190501-09-00-04 specifies the MIL-C-5015 interface; the integral 32-foot cable belongs to option 99.
How is polarity interpreted at the 190501-09-00-04 connector?
For 190501-09-00-04, pin A moves positive relative to pin B when velocity is directed from the mounting base toward the top.
What installation mistake can distort the 190501-09-00-04 signal?
A loose or unsuitable mounting location can reduce the amplitude and frequency response of 190501-09-00-04 or generate motion that does not represent casing vibration.