200155-22-05 | Bently Nevada Low Frequency Trendmaster Pro Accelerometer

What Is the Bently Nevada 200155-22-05?

When slow rotating shafts and fin-fan applications demand reliable vibration data, the 200155-22-05 from Bently Nevada provides a robust solution. This Low Frequency Trendmaster Pro Accelerometer is engineered for precise measurement in challenging industrial environments. With a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, it captures subtle vibrations that standard sensors miss. The unit operates with an excitation voltage of 4.7 to 5.5 Vdc and a quiescent current under 800 µA, ensuring low power consumption. Its output bias voltage sits at +2.5 ± 0.23 Vdc, offering a stable signal for analysis. Built for durability, this accelerometer handles axial shocks up to 49,050 m/s² pk (5,000 g pk) and operates across a temperature range of -40 ºC to +105 ºC (-40 ºF to +221 ºF).

Key Features & Technical Specs

• Measurement range of ±196 m/s² (±20 g) accommodates a wide vibration spectrum.
• Frequency range from 1.5 to 10,000 Hz (90 to 600,000 cpm) covers low to moderate speeds.
• Mounted resonant frequency exceeds 20 kHz (>1200 kcpm) for reliable high-frequency response.
• Amplitude linearity of ±2% (1 to 10 g pk) ensures accurate readings across the measurement range.
• Transverse sensitivity ≤7% minimizes cross-axis errors.
• Settling time ≤2000 ms (within 5% of bias) allows quick stabilization after power-up.
• Hermetic sealing at 5x10⁻⁸ atm•cc/s (3.1x10⁻⁹ atm•in³/s) protects against moisture ingress.
• 316L stainless steel housing and connector resist corrosion in harsh environments.

A distinctive spec is the 200155-22-05's low-frequency capability down to 1.5 Hz, making it ideal for monitoring slow-speed machinery where early fault detection is critical.

Real-World Applications

This accelerometer excels in fin-fan cooling systems and slow rotating shafts, common in power generation and petrochemical plants. For example, in a fin-fan application, the 200155-22-05 detects bearing wear or imbalance before they cause unplanned downtime. It also suits paper mill rollers, wind turbine generators, and any equipment operating below 600 RPM. The multiple approvals (CSA, ATEX, and IECEx) allow deployment in hazardous areas without additional certification.

Installation Guide

Mount the 200155-22-05 using the 3/8-24 female thread with a torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf). The mounting stud option 21 includes a 3/8-24 outer diameter to M6x1 inner diameter 1-3/8 inch hex plate stud. Ensure the mounting surface is clean and flat to achieve optimal coupling. After installation, allow a cure time of 24 hours before taking critical measurements. Connect the SIG+ and SIG- leads according to polarity: SIG+ positive with respect to SIG- for acceleration from base to connector.

Maintenance & Reliability

Regularly inspect the 200155-22-05 for physical damage or corrosion, especially in condensing humidity environments. The hermetically sealed design prevents moisture ingress, but cable connections should be checked periodically. Given the 100% relative humidity rating (condensing, non-submerged), this unit withstands wet conditions without failure. For long-term reliability, verify the output bias voltage remains within +2.5 ± 0.23 Vdc during routine calibration checks.

Compatibility & Integration

The 200155-22-05 is designed for use with the ProTIM Option Low Frequency Acceleration-to-Velocity channel type (-05). It integrates seamlessly with Bently Nevada monitoring systems that accept 4.7 to 5.5 Vdc excitation. The accelerometer's ceramic shear sensing element provides stable performance over time. For system integration, refer to the official Bently Nevada documentation for wiring diagrams and configuration settings.

Common Questions About the 200155-22-05

Q: What is the measurement range of the 200155-22-05?

A: The accelerometer measures up to ±196 m/s² (±20 g) with a low-range option of 24.5 mm/s² (2.5 mg).

Q: What temperature range does this accelerometer support?

A: It operates from -40 ºC to +105 ºC (-40 ºF to +221 ºF) and can be stored from -55 ºC to +121 ºC (-67 ºF to +250 ºF).

Q: Is the 200155-22-05 suitable for hazardous areas?

A: Yes, it carries multiple approvals including CSA, ATEX, and IECEx (option 05) for use in explosive environments.

Q: How long does the accelerometer take to stabilize after power-up?

A: The settling time is ≤2000 ms to within 5% of the output bias voltage.

Q: What mounting thread does the 200155-22-05 use?

A: It uses a 3/8-24 female thread with a recommended mounting torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf).

Product Support & Availability

The 200155-22-05 is available through Petro Auto Tech. Contact our team for current stock levels and lead times. We provide fast shipping and expert support to help you select the right accelerometer for your application.