Description
Bently Nevada 190501-11-00-CN is a low-frequency, piezo-velocity sensor engineered to capture casing vibration velocity on heavy industrial rotating machinery. This specific Cooling Tower (CT) variant tracks structural unbalance, misalignment, and mechanical defects on low-speed fan assemblies, air-cooled heat exchangers, and gear reducers operating at or above 90 rpm.
Option Code Breakdown
- 190501: Base Model (Velomitor CT Velocity Transducer)
- 11: Mounting Hardware Option (Includes a 5/8-in 18 UNF quick-disconnect stud base)
- 00: Connection Option (Standard top-mounted MIL-C-5015 2-pin connector interface)
- CN: Agency Approval Option (ATEX, IECEx, and regional hazardous area markings for explosive atmospheres)
Commercial Supply Status
- Condition: New Original (Factory Sealed)
- Availability: In stock
- Lead Time: Ships within 1–3 business days
- Warranty: 12-month industrial replacement warranty
- Price Policy: The market price fluctuates according to regional hazardous-area compliance verification fees and raw component supply chains. The current listing serves as an open commercial reference. Contact our international trade office for a firm, negotiable volume quote.
Technical Parameters
| Parameter | Value |
| Sensitivity | 3.94 mV/mm/s (100 mV/in/s) ±5% |
| Frequency Response (±1.0 dB) | 3.0 Hz to 900 Hz (180 to 54,000 cpm) |
| Frequency Response (±3.0 dB) | 1.5 Hz to 1.0 kHz (90 to 60,000 cpm) |
| Velocity Range Peak | 63.5 mm/s pk (2.5 in/s pk) |
| Output Bias Voltage | 10.1 V DC ± 1.0 V DC (Pin A wrt Pin B) |
| Case Material | 316L Stainless Steel |
| Mounting Torque | 4.5 Nm ± 0.6 Nm (40 in-lbf ± 5 in-lbf) |
| Operating Temperature | −40 to +85°C |
Field Deployment Notes & Insights
Deploying this low-frequency transducer on cooling tower shrouds requires meticulous care during the physical seating process. Well, technically the internal electronics are completely isolated from the 316L stainless steel case to eliminate ground loops, but if you over-torque the 5/8-in quick-disconnect stud past the 4.5 Nm specification, you risk permanently warping the sensor base. This design choice is actually clever because the quick-disconnect setup lets you replace sensors during winter shutdowns without unthreading the entire permanent conduit run.
Pay close attention to the orientation of the top MIL-C-5015 socket connector. Moisture entry is the number one cause of loop voltage dropouts on cooling tower decks. Ensure your splash-proof boot or liquid-tight flexible conduit is sealed right up against the top housing interface—though your mileage may vary if you neglect to use a silicone thread-wrap compound in high-humidity zones. Is your monitoring rack configured for 100 mV/in/s scaling? Verify with the official OEM datasheet (document 141636) to prevent calibration errors during loop verification. Bottom line—keep the pins dry to prevent false alarms.
International Shipping & Trade Compliance
Cross-border freight for dual-certified hazardous area equipment requires precise legal documentation. We classify this velocity sensor under HS Code 90318020 on all commercial invoices and export declarations. Our trade desk provides comprehensive customs clearance routing via expedited air corridors (DHL, FedEx) to minimize transit holding windows.
Because this unit carries the specific “CN” regional approval suffix, compliance verification is handled before the cargo leaves our export depot. Standard trade transactions execute under FCA (Free Carrier) or CIP (Carriage and Insurance Paid) agreements to give procurement managers absolute oversight of logistics costs.
Frequently Asked Questions
Can I use a standard 330500 Velomitor cable with this CT model?
Yes. Both systems utilize the standard 2-pin MIL-C-5015 top connection profile. However, ensure the cable jacket material matches your temperature and oil exposure conditions.
How do I test the health of the transducer without a vibration table?
Using a digital multimeter, check the DC bias voltage between Pin A and Pin B while the loop is powered by a 3500 monitor rack or transmitter module. A healthy sensor will read right around 10.1 V DC.
