181M6049 | Bently Nevada Dual Output Sensor 100 mV/g

Introduction to the Bently Nevada 181M6049

When machinery vibration threatens production uptime, the 181M6049 from Bently Nevada provides a reliable solution. This dual output sensor combines accelerometer and temperature sensing in one rugged package. It is designed for continuous monitoring in harsh industrial settings.

With a sensitivity of 100 mV/g, the 181M6049 captures fine vibration details. Its temperature sensor output helps you track thermal changes that often precede mechanical failure. This dual capability reduces the need for multiple sensors, simplifying installation and lowering overall costs.

Key Features and Technical Specifications

The 181M6049 is built to deliver accurate data across a wide range of conditions. Below are the core specifications extracted from the official datasheet:

• Dynamic Sensitivity: 100 mV/g ±5% at 25°C
• Acceleration Range: 60 g peak
• Amplitude Nonlinearity: 1%
• Frequency Response: ±5% from 3 to 5,000 Hz; ±10% from 1 to 7,000 Hz; ±3 dB from 0.5 to 12,000 Hz
• Resonant Frequency: 30 kHz
• Transverse Sensitivity: ±5% of axial (max)
• Temperature Sensor Output: 10 mV/°C
• Temperature Measurement Range: 2° to 120°C
• Voltage Source: 18-28 Vdc
• Current Regulating Diode: 2-10 mA
• Broadband Electrical Noise: 700 µg (2.5 Hz to 25 kHz)
• Spectral Noise: 10 µg/√Hz at 10 Hz; 5 µg/√Hz at 100 Hz and 1000 Hz
• Output Impedance: 100 Ω max
• Bias Output Voltage: 12 Vdc
• Grounding: Case isolated, internally shielded
• Temperature Range: -50°C to +120°C
• Vibration Limit: 500 g peak
• Shock Limit: 5,000 g peak
• Electromagnetic Sensitivity: 70 µg/gauss max
• Sealing: Hermetic
• Base Strain Sensitivity: 0.0002 g/μstrain max
• Sensing Element: PZT ceramic / shear
• Weight: 90 grams
• Case Material: 316L Stainless Steel
• Mounting: ¼-28 UNF tapped hole
• Connector: 3-pin, MIL-C-5015 style

These specifications highlight the sensor's ability to perform in extreme conditions. The hermetically sealed 316L stainless steel case protects against moisture and contaminants. The wide temperature range ensures reliable operation in both hot and cold environments.

Applications and Use Cases

The 181M6049 is ideal for rotating machinery monitoring, including pumps, motors, fans, and compressors. Its dual output allows simultaneous vibration and temperature tracking, which is critical for predictive maintenance programs. In chemical plants, the corrosion-resistant case withstands aggressive atmospheres. In power generation, the sensor helps detect bearing wear before catastrophic failure. By providing early warning, the 181M6049 reduces unplanned downtime and extends equipment life.

Installation and Setup

Proper installation is essential for accurate readings. The 181M6049 uses a ¼-28 UNF tapped hole for secure mounting. Ensure the mounting surface is flat and clean to achieve optimal frequency response. The 3-pin MIL-C-5015 connector simplifies wiring. Recommended cabling options include 16925-XX (without armor) and 16710-XX (with armor). Always follow the manufacturer's guidelines for torque and cable routing to avoid strain on the connector.

Maintenance and Reliability

Routine inspection of the sensor and cabling is recommended to maintain performance. Check for physical damage, loose connections, or signs of corrosion. The hermetically sealed design minimizes the need for internal maintenance. Periodic verification of output signals against a known reference can confirm accuracy. Following a regular maintenance schedule helps maximize the sensor's service life and reliability.

Compatibility and Integration

The 181M6049 is designed to work with Bently Nevada monitoring systems. Its standard 100 mV/g sensitivity and 18-28 Vdc power supply make it compatible with many industrial data acquisition systems. The temperature sensor output (10 mV/°C) can be integrated into existing temperature monitoring loops. For detailed integration guidance, consult the official Bently Nevada documentation or contact Petro Auto Tech.

Frequently Asked Questions

Q: What is the frequency response of the 181M6049?

A: The sensor has a frequency response of ±5% from 3 to 5,000 Hz, ±10% from 1 to 7,000 Hz, and ±3 dB from 0.5 to 12,000 Hz.

Q: Can the 181M6049 measure temperature?

A: Yes, it includes a temperature sensor with an output of 10 mV/°C and a measurement range of 2° to 120°C.

Q: What is the power requirement for the 181M6049?

A: It requires a voltage source of 18-28 Vdc and uses a current regulating diode of 2-10 mA.

Q: Is the 181M6049 suitable for harsh environments?

A: Yes, it has a hermetic seal and a 316L stainless steel case, with an operating temperature range of -50°C to +120°C.

Q: What mounting option does the 181M6049 use?

A: It uses a ¼-28 UNF tapped hole for secure mounting.

Product Support and Availability

The Bently Nevada 181M6049 is available from Petro Auto Tech. We stock this dual output sensor and can provide technical support to help you select the right configuration. Contact our team for pricing and delivery information.