190501-04-00-CN Bently Nevada Velocity Transducer

Bently Nevada 190501-04-00-CN Velomitor CT Velocity Transducer

Product Introduction

The Bently Nevada 190501-04-00-CN belongs to the trusted Velomitor CT series and offers a distinct advantage with its M6x1 mounting stud and 3/8-24 adapter. This configuration provides excellent mounting flexibility for metric-thread installations, which are common in many international machinery designs. This sensor delivers precise absolute casing vibration measurements, making it an essential component for effective machinery protection and predictive maintenance programs. Furthermore, its rugged 316L stainless steel construction and advanced internal shielding ensure reliable operation even in challenging industrial environments with high electromagnetic interference.

Technical Specifications

The 190501-04-00-CN delivers a standard sensitivity of 3.94 mV/mm/s (100 mV/in/s) with a tight tolerance of ±5%. Its frequency response spans from 3.0 Hz to 900 Hz within ±1.0 dB and extends from 1.5 Hz to 1.0 kHz within ±3.0 dB, effectively covering the vibration frequencies of most turbines, compressors, and pumps. In addition, the amplitude linearity remains within ±2% up to 63.5 mm/s peak, which ensures accurate readings across the entire measurement range. The mounted resonant frequency reaches a minimum of 9 kHz when stud mounted, effectively preventing resonance-related inaccuracies in critical speed ranges.

Furthermore, the output bias voltage maintains a steady 10.1 Vdc ± 1.0 Vdc on Pin A relative to Pin B, with a typical dynamic output impedance of less than 400 Ω. The internal electronics feature galvanic isolation from the sensor case, which effectively eliminates troublesome ground loop problems. For instance, this isolation proves particularly valuable in large industrial installations where ground potential differences commonly cause measurement errors. The 190501-04-00-CN also supports cable runs up to 305 meters (1,000 feet) using Bently Nevada cable part number 02173006 without any signal degradation, making it suitable for installations where the monitoring equipment resides far from the measurement point.

Environmental and Mechanical Limits

Engineered for extreme conditions, the 190501-04-00-CN operates reliably between -40°C and +85°C and can withstand storage temperatures from -40°C to +100°C. It also handles a shock limit of 5000 g peak, ensuring outstanding durability in high-impact machinery applications. The housing and top-mounted MIL-C-5015 connector both feature 316L stainless steel construction, providing excellent corrosion resistance in aggressive environments. The unit weighs less than 297 grams, and we recommend a mounting torque of 4.5 N-m ± 0.6 N-m for secure installation. Moreover, the sensor installs in any orientation, offering maximum flexibility during system design and retrofitting projects.

Agency Approvals and Safety

The 190501-04-00-CN carries the "CN" agency approval, which includes certifications specifically recognized in the Chinese market. This model holds Intrinsically Safe certification (Ex ia IIC T4) for Class I, Division 1, Groups A, B, C, and D, as well as Class II and III environments. Additionally, it features Non-Incendive approval (Ex nL IIC T4) for Class I, Division 2 applications. The temperature classification is T4, with an ambient temperature range from -40°C to +100°C. Consequently, these certifications make the Bently Nevada 190501-04-00-CN an ideal choice for installation in potentially explosive atmospheres such as oil refineries, chemical plants, and gas processing facilities.

Installation Guidelines

Proper installation of the 190501-04-00-CN ensures optimal performance and measurement accuracy. First, prepare a clean, flat mounting surface with a minimum diameter of 33 mm. Next, inspect the M6x1 stud and the 3/8-24 adapter to confirm they are free from damage or debris. Then, apply a suitable anti-seize compound to the threads to facilitate future sensor removal. After that, hand-tighten the transducer into the mounting hole before applying the final torque of 4.5 N-m ± 0.6 N-m with a calibrated torque wrench. Finally, connect the sensor using a compatible MIL-C-5015 connector, ensuring cable length does not exceed the 305-meter maximum limit for optimal signal integrity.

Packaging List

• 1 x Bently Nevada 190501-04-00-CN Velomitor CT Velocity Transducer

• 1 x M6x1 Mounting Stud with 3/8-24 Adapter

• 1 x Installation Instruction Sheet

All shipments are made via FedEx, UPS, or DHL with secure packaging to prevent damage during transit.

Frequently Asked Questions (FAQ)

Q1: How does the 190501-04-00-CN differ from other Velomitor CT models?

A1: The 190501-04-00-CN specifically includes an M6x1 mounting stud with a 3/8-24 adapter, offering greater flexibility for installations that require metric threading. All other electrical and performance specifications remain identical to the standard model.

Q2: Can I use this sensor in explosive environments?

A2: Yes. The 190501-04-00-CN carries both Intrinsically Safe (Ex ia IIC T4) and Non-Incendive (Ex nL IIC T4) certifications, making it suitable for Class I, Division 1 and 2 hazardous areas.

Q3: What is the maximum cable length this transducer supports?

A3: The 190501-04-00-CN supports cable runs up to 305 meters (1,000 feet) when using Bently Nevada cable part number 02173006, with no measurable signal degradation at this distance.

Q4: Is the polarity important when connecting this sensor?

A4: Yes. Pin A goes positive with respect to Pin B when the velocity direction is from the base to the top of the transducer. Proper polarity connection ensures correct phase response in your monitoring system.

Q5: What is the minimum mounting surface requirement for this transducer?

A5: The mounting surface must be at least 33 mm (1.3 inches) in diameter and should be flat and smooth to ensure proper contact and accurate vibration transfer to the sensor.