Product Overview
When monitoring slow rotating shafts in fin-fan applications, standard accelerometers often fail to capture low-frequency vibrations accurately. The Bently Nevada 200155-08-05 Low Frequency Trendmaster Pro accelerometer solves this challenge with a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz. This sensor delivers reliable data for predictive maintenance in demanding industrial environments.
Manufactured by Bently Nevada in the U.S.A., this accelerometer features a 3/8-24 to 1/2 NPT 1-inch hex stud mounting option (code 08) and multiple approvals including CSA, ATEX, and IECEx (code 05). It is used with the ProTIM Option Low Frequency Acceleration-to-Velocity channel type (-05).
Technical Specifications
Key performance parameters of the 200155-08-05 include:
- Measurement Range: ±196 m/s² (±20 g) for acceleration; 24.5 mm/s² (2.5 mg) for low-range measurements.
- Frequency Range: 1.5 to 10,000 Hz (90 to 600,000 cpm), referenced to 80 Hz (±10%).
- Mounted Resonant Frequency: >20 kHz (>1200 kcpm).
- Amplitude Linearity: ±2% (1 to 10 g pk).
- Transverse Sensitivity: ≤7%.
- Settling Time: ≤2000 ms (within 5% of bias).
- Excitation Voltage: 4.7 to 5.5 Vdc.
- Quiescent Current: <800 µA.
- Output Bias Voltage: +2.5 ± 0.23 Vdc.
- Temperature Range: -40 ºC to +105 ºC (-40 ºF to +221 ºF).
- Axial Shock Limit: 49,050 m/s² pk (5,000 g pk).
- Sealing: Hermetic, 5×10⁻⁸ atm·cc/s (3.1×10⁻⁹ atm·in³/s) maximum.
- Relative Humidity: 100% condensing, non-submerged.
- Physical Size: 17.5 mm x 45.7 mm (11/16 in x 1.8 in).
- Weight: 58 g (2.0 oz), typical.
- Mounting Thread: 3/8-24 female; torque 2.7 to 6.8 N·m (2 to 5 ft·lbf).
- Sensing Element: Ceramic, shear geometry.
- Housing Material: 316L stainless steel.
These specifications ensure accurate low-frequency vibration measurement in harsh conditions.
Industry Applications
This accelerometer excels in two primary applications:
- Fin-Fan Cooling Systems: Slow rotating fan shafts generate low-frequency vibrations. The 200155-08-05 captures these signals reliably, enabling early detection of bearing wear or imbalance.
- Slow Rotating Shafts: In pumps, compressors, and mixers operating below 600 RPM, standard sensors miss critical data. This model’s 1.5 Hz lower limit covers those frequencies.
Using this sensor reduces unplanned downtime by providing actionable vibration trends.
Installation & Setup Guidance
Mount the accelerometer using the 3/8-24 female thread. Apply a mounting torque of 2.7 to 6.8 N·m (2 to 5 ft·lbf) to ensure proper coupling. The 3/8-24 to 1/2 NPT 1-inch hex stud adapter simplifies integration into existing ports. Connect the sensor to a compatible ProTIM module configured for Low Frequency Acceleration-to-Velocity channel type (-05). Verify excitation voltage between 4.7 and 5.5 Vdc and monitor output bias voltage at +2.5 ± 0.23 Vdc after a settling time of up to 2000 ms.
Maintenance & Reliability
The hermetically sealed 316L stainless steel housing protects against moisture and corrosive environments. With 100% condensing humidity tolerance and a temperature range of -40 ºC to +105 ºC, this sensor withstands extreme conditions. Periodic inspection of the mounting integrity and cable connections ensures consistent performance. The ceramic shear sensing element offers long-term stability, reducing calibration frequency.
Selection Guide & Purchasing Advice
Before ordering, verify that your system supports the 4.7 to 5.5 Vdc excitation and accepts the 10.2 mV/(m/s²) sensitivity. The 200155-08-05 includes multiple approvals (CSA, ATEX, IECEx) for hazardous area installations. Contact SpareTechPLC to confirm current lifecycle status and availability. We stock this model and can advise on compatible ProTIM modules.
Frequently Asked Questions
Q: What is the frequency range of the 200155-08-05?
A: The frequency range is 1.5 to 10,000 Hz (90 to 600,000 cpm), referenced to 80 Hz.
Q: Can this accelerometer be used in hazardous areas?
A: Yes, the 200155-08-05 has multiple approvals including CSA, ATEX, and IECEx.
Q: What is the mounting thread size?
A: The mounting thread is 3/8-24 female, and the included stud adapter is 3/8-24 to 1/2 NPT.
Q: What is the output bias voltage?
A: The output bias voltage is +2.5 ± 0.23 Vdc.
Q: What is the weight of this accelerometer?
A: The typical weight is 58 g (2.0 oz).
