Description
1. Product Title
Bently Nevada 190501-11-00-04 – Velomitor CT Low-Frequency Piezoelectric Velocity Vibration Transducer (Stud Mount Version)
2. Product Overview
The 190501-11-00-04 belongs to Bently Nevada Velomitor CT dedicated low-frequency velocity transducer series, specially calibrated for casing vibration measurement of low-speed rotating equipment such as cooling tower fans and air-cooled heat exchanger blowers. Optimized for ultra-low frequency response down to 90 RPM rotating speed, it adopts integrated piezoelectric internal signal conditioning circuit to directly convert mechanical vibration velocity into linear analog voltage output, eliminating the need for external secondary conversion modules. The suffix
-11 defines the stud-only mounting structure without integrated cable, which allows users to freely configure custom-length shielded extension cables on site for flexible layout in complex cabinet and field environments. Built-in multi-stage EMI filtering and fully sealed 316L stainless steel housing enable 190501-11-00-04 to resist outdoor high humidity, dust, corrosive gas and strong electromagnetic interference. It transmits accurate vibration data of rotor unbalance, bearing degradation and structural looseness to the Bently Nevada 3500 machinery protection rack, DCS and PLC safety interlock systems, realizing early fault warning and automatic emergency shutdown protection for large low-speed fan equipment.3. Technical Specifications
- Brand: Bently Nevada
- Model: 190501-11-00-04
- Warranty: One Year
- Condition: 100% New & Original
- Product Series: Velomitor CT Cooling Tower Low-Frequency Velocity Transducer
- Suffix Code Definition:
- 11 = Stud mounting type (no factory integrated cable, separate wiring required)
- 00 = Standard internal circuit and connector configuration
- 04 = Global hazardous area safety certifications (ATEX / IECEx Ex ia IIC T4)
- Standard Sensitivity: 3.94 mV/mm/s (100 mV/in/s), tolerance ±5%
- Frequency Response:
3 Hz ~ 900 Hz (±1dB); extended range 1.5 Hz ~ 1000 Hz (±3dB)
- Max Measurable Vibration Velocity: 63.5 mm/s peak
- Mounted Resonant Frequency: ≥9 kHz
- Transverse Sensitivity: Less than 5% of axial measurement sensitivity
- Output Impedance: ＜400 Ω typical
- Mounting Thread: 3/8″-24 UNF standard stud thread
- Recommended Installation Torque: 4.5 N·m (40 in-lbf)
- Operating Temperature: -40°C ~ +85°C continuous operation
- Housing Material: Corrosion-resistant 316L stainless steel
- Protection Grade: IP67 (with matched connector protective boot)
- Max Supporting External Cable Length: 305 meters (1000 feet)
- Compatible System: Bently Nevada 3500 series machinery monitoring and protection rack
4. Application Scenarios
- Thermal Power Plant Cooling Tower Systems: Installed on large induced draft and forced draft cooling tower fans to monitor low-frequency casing vibration, predict fan blade imbalance, reducer gear wear and foundation structural loosening.
- Oil & Gas Petrochemical Air Cooler Units: Deployed on outdoor air-cooled heat exchanger fan assemblies in refineries and chemical plants, performing vibration monitoring in explosive, humid and corrosive hazardous working zones.
- Cement & Metallurgy Industrial Exhaust Equipment: Applied on large workshop axial fans, flue gas induced draft blowers and waste gas treatment rotary fans, supporting long-term stable condition monitoring and equipment safety trip interlock control.
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