Bently Nevada 190501-09-00-CN Velomitor CT Sensor

Bently Nevada 190501-09-00-CN Velomitor CT Velocity Transducer

Product Introduction

The Bently Nevada 190501-09-00-CN belongs to the trusted Velomitor CT series, which is widely recognized for its accuracy in measuring absolute casing vibration. This particular model, the 190501-09-00-CN, provides a stable 100 mV/in/s output and operates effectively across a broad frequency range. Furthermore, its rugged 316L stainless steel construction makes it suitable for demanding applications in power generation, oil and gas, and heavy industry. Consequently, this sensor offers a dependable solution for predictive maintenance and machinery protection strategies.

Technical Specifications

The 190501-09-00-CN delivers a standard sensitivity of 3.94 mV/mm/s (100 mV/in/s) with an accuracy of ±5%. Its frequency response spans from 3.0 Hz to 900 Hz within ±1.0 dB, and it extends from 1.5 Hz to 1.0 kHz within ±3.0 dB. For instance, this range effectively covers the running speeds of most common industrial turbines, compressors, and pumps. The amplitude linearity is excellent, remaining within ±2% up to 63.5 mm/s peak. Additionally, the mounted resonant frequency is a minimum of 9 kHz when stud mounted, which ensures a wide, usable frequency band free from resonance interference.

The output bias voltage is specified at 10.1 Vdc ± 1.0 Vdc on Pin A relative to Pin B. The dynamic output impedance is typically less than 400 Ω, which allows for easy integration with most monitoring systems. Moreover, the internal electronics are isolated from the case, effectively preventing ground loop issues. Signal integrity is maintained over long cable runs, with a maximum cable length of 305 meters (1,000 feet) without signal degradation.

Environmental and Mechanical Limits

This sensor is engineered for extreme conditions. Its operating temperature range is from -40°C to +85°C, and it can be stored between -40°C and +100°C. Furthermore, it can withstand a shock limit of 5000 g peak, making it robust for high-impact machinery. The housing is constructed from 316L stainless steel, and the top-mounted connector is also 316L stainless steel with a MIL-C-5015 interface. The unit weighs less than 297 grams and has a mounting surface diameter of 33 mm. The recommended mounting torque is 4.5 N-m ± 0.6 N-m, and importantly, the transducer can be mounted in any orientation.

Agency Approvals and Safety

The 190501-09-00-CN carries the "CN" agency approval option, which denotes country-specific certifications suitable for use in China. For hazardous areas, it features Intrinsically Safe and Non-Incendive ratings. Specifically, it meets the requirements for Ex ia IIC T4 and Class I, Div 1, Groups A, B, C, D. Additionally, it is approved for Class I, Division 2, Groups A, B, C, and D with an AEx nA T4 rating. These certifications make the Bently Nevada 190501-09-00-CN a versatile and safe choice for installation in potentially explosive atmospheres, as per drawing 167536.

Installation Guidelines

Proper installation is crucial for optimal performance. First, prepare a flat, smooth mounting surface of at least 33 mm in diameter. Next, apply a thin layer of anti-seize compound to the mounting stud to facilitate future removal. Then, hand-tighten the transducer into the mounting hole. Finally, torque the sensor to 4.5 N-m ± 0.6 N-m using a calibrated torque wrench. Remember that the maximum cable length is 305 meters; ensure you use the recommended cable (part number 02173006) for best results. Additionally, the mounting angle is flexible, so you can orient the sensor to suit your specific mechanical layout without affecting its performance.

Packaging List

• 1 x Bently Nevada 190501-09-00-CN Velomitor CT Velocity Transducer

• 1 x Mounting Stud (3/8-24 to 1/4 NPT)

• 1 x Installation Instruction Sheet (Hardcopy)

All shipments are made via FedEx, UPS, or DHL.

Frequently Asked Questions (FAQ)

Q1: What is the primary application for the 190501-09-00-CN?
A1: The 190501-09-00-CN is primarily used for measuring absolute casing vibration on rotating machinery like turbines, compressors, and fans, providing data for machinery protection and condition monitoring.

Q2: Is the 190501-09-00-CN suitable for use in hazardous areas?
A2: Yes. The 190501-09-00-CN holds both Intrinsically Safe (Ex ia IIC T4) and Non-Incendive (Ex nL IIC T4) certifications, making it appropriate for Class I, Divisions 1 and 2 environments.

Q3: Does the mounting orientation affect the sensor's output?
A3: No. This sensor can be mounted in any angle or orientation. The "Polarity" note indicates that Pin A goes positive with respect to Pin B when velocity is directed from the base to the top.

Q4: Can I use standard cables with this transducer?
A4: For best performance and to maintain signal integrity, we recommend using Bently Nevada cable part number 02173006. The sensor supports a maximum cable length of 305 meters without signal loss.

Q5: What is the minimum mounting surface diameter required?
A5: The mounting surface for the 190501-09-00-CN should be at least 33 mm (1.3 inches) in diameter to ensure proper and secure installation.