The Bently Nevada 190501-08-99-04 is a rugged velocity transducer built for industrial vibration monitoring. It converts casing velocity into a proportional electrical signal. This model includes a plate stud mounting option (3/8-24 to 1/2-20) and a 32-foot integral cable. Users trust it for steam turbines, compressors, and fans. Additionally, it carries hazardous area approvals like CSA and ATEX. Its stainless steel housing ensures long-term reliability in harsh environments.
Sensitivity and Frequency Response
The 190501-08-99-04 offers a sensitivity of 3.94 mV/mm/s (100 mV/in/s) ±5%. Its frequency response spans 3.0 Hz to 900 Hz (180 to 54,000 cpm) at ±1.0 dB. For broader needs, it covers 1.5 Hz to 1.0 kHz (90 to 60,000 cpm) at ±3.0 dB.
Electrical Characteristics
Output bias voltage is 10.1 Vdc ±1.0 Vdc (Pin A to Pin B). Dynamic output impedance stays below 400 Ω typical. The broadband noise floor is only 0.229 mm/s (0.009 in/s) pk. Internal electronics are isolated from the case, which simplifies grounding.
Amplitude Linearity and Transverse Response
Linearity reaches ±2% up to 63.5 mm/s pk (2.5 in/s pk). Transverse response is less than 5% of axial sensitivity. Therefore, you get accurate readings even with off-axis vibrations.
Temperature and Humidity
Operating temperature ranges from -40°C to +85°C (-40°F to +185°F). Storage is safe from -40°C to +100°C (-40°F to +212°F). Moreover, it withstands 100% condensing humidity (non-submerged).
Shock and Magnetic Field
Shock limit is 5000 g pk maximum. Magnetic field susceptibility is below 0.0068 mm/s/gauss at 50 gauss, 50-60Hz. This ensures stable readings near motors or generators.
Case and Mounting
Case material is 316L stainless steel. Height measures 82 mm (3.2 in). Mounting surface diameter is 33 mm (1.3 in). Recommended torque is 4.5 N-m ±0.6 N-m (40 in-lbf ±5 in-lbf). The sensor works in any orientation.
Hazardous Area Classifications
The Bently Nevada 190501-08-99-04 carries CSA/NRTL/C Class I, Division 1 approval. It also meets ATEX/IECEx/CSA for Class I, Zone 0/1. For intrinsic safety, it is Ex ia IIC T4, covering Class I, Div 1 Groups A, B, C, D. Additionally, it supports nonincendive use as Ex nL IIC T4 for Class I, Division 2.
Installation Notes
Install per drawing 167536. The T4 rating applies from -40°C to +100°C (-40°F to +212°F). Always follow local safety codes when installing this velocity transducer.
Mounting Hardware Option
Option code 08 provides a plate stud. It adapts from 3/8-24 to 1/2-20 thread. This allows flexible attachment to different machine surfaces.
Cable and Connection
Connection option 99 includes a 32-foot (9.75 m) integral cable. Maximum cable length is 305 meters (1,000 ft) using part number 02173006 without signal loss. The connector is a 2-pin 316L stainless steel MIL-C5015, top entry.
Step-by-Step Mounting
First, clean the mounting surface to remove dirt or old sealant. Next, apply anti-seize compound to the stud if needed. Then, hand-tighten the 190501-08-99-04 onto the plate stud. Finally, torque to 4.5 N-m ±0.6 N-m. Do not over-tighten, as this may damage the housing.
Cable Routing Tips
Avoid sharp bends or kinks in the 32-foot cable. Use cable ties every 30 cm to secure it. Keep the cable away from high-voltage lines to prevent electrical noise.
Polarity Check
Pin A goes positive with respect to Pin B when velocity moves from base to top. Verify polarity before connecting to your monitoring system.
Bently Nevada 190501-08-99-04 Velomitor CT velocity transducer (1 unit)
Integral 32-foot cable with 2-pin MIL-C5015 connector
Plate stud mounting hardware (3/8-24 to 1/2-20)
Installation drawing reference sheet (drawing 167536)
Desiccant bag for moisture control
Note: Certificates and warranty documents are not included in this list.
1. What machines is the Bently Nevada 190501-08-99-04 used for?
It measures casing vibration on turbines, compressors, fans, pumps, and generators. The 190501-08-99-04 works best in continuous monitoring systems.
2. Can I shorten the 32-foot cable?
Shortening is not recommended. Cutting the cable changes capacitance and may affect signal integrity. Use the full length or order a different connection option.
3. How do I know if the sensor needs replacement?
Check the output bias voltage. It should be 10.1 Vdc ±1.0 Vdc. If readings drift outside this range, replace the Bently Nevada 190501 unit.
4. Is this transducer waterproof for outdoor use?
It handles 100% condensing humidity but must not be submerged. For outdoor use, protect the connector with weather-sealing tape.
5. What shipping carriers do you use?
We ship via FedEx, UPS, or DHL. Each order includes tracking and industrial-grade packaging to prevent damage.
| Brand Name | Bently Nevada |
| Model No. | 190501-08-99-04 |
| Product Type | Velomitor CT Velocity Transducer |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
