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

Introduction to the Bently Nevada 181M6049

In the evolving landscape of industrial automation, the need for precise and reliable monitoring has never been greater. The 181M6049 from Bently Nevada addresses this demand with a dual output sensor that combines accelerometer and temperature sensing in a single, rugged package. Designed for harsh environments, this sensor delivers accurate vibration data and temperature readings, enabling proactive maintenance and reducing unplanned downtime.

With a dynamic sensitivity of 100 mV/g and a wide frequency response, the 181M6049 captures critical machinery health information. Its robust construction, including a 316L stainless steel case and hermetic sealing, ensures long-term performance even in demanding industrial settings.

Key Features and Technical Specifications

The 181M6049 offers a comprehensive set of specifications that make it a versatile choice for condition monitoring. Below are the essential parameters:

• Dynamic Sensitivity: 100 mV/g (±5% at 25°C)
• Acceleration Range: 60 g peak
• 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
• Temperature Sensor Output: 10 mV/°C, measurement range 2° to 120°C
• Voltage Source: 18-28 Vdc
• Current Regulating Diode: 2-10 mA
• Output Impedance: Max 100 Ω
• Bias Output Voltage: 12 Vdc
• Temperature Range: -50°C to +120°C
• Vibration Limit: 500 g peak
• Shock Limit: 5,000 g peak
• Sealing: Hermetic
• Weight: 90 grams
• Case Material: 316L Stainless Steel
• Mounting: ¼-28 UNF tapped hole
• Connector: 3-pin, MIL-C-5015 style

One distinctive feature is the dual output capability, providing both vibration and temperature data from a single sensor. This integration simplifies installation and reduces the number of components required, offering a cost-effective solution for comprehensive machine health monitoring.

Applications and Use Cases

The 181M6049 is ideal for rotating machinery such as pumps, motors, fans, and compressors. Its wide frequency response and high shock tolerance make it suitable for both low-speed and high-speed equipment. In addition, the temperature sensor enables monitoring of bearing and housing temperatures, which is critical for detecting early signs of failure.

For example, in a paper mill, the sensor can be mounted on a dryer roll bearing housing to provide real-time vibration and temperature data. This allows maintenance teams to identify misalignment or lubrication issues before they escalate, thereby extending equipment life and minimizing production interruptions.

Installation and Setup

Proper installation is crucial for accurate readings. The 181M6049 features a ¼-28 UNF tapped hole for secure mounting. Ensure the mounting surface is clean and flat to avoid base strain errors. The sensor is case isolated and internally shielded, which helps reduce electromagnetic interference. Recommended cabling includes 16925-XX (without armor) or 16710-XX (with armor) for reliable signal transmission.

When wiring, connect the shell to ground, pin A for accelerometer power/signal, pin B for common, and pin C for temperature sensor signal. Always follow the manufacturer's guidelines to ensure optimal performance.

Maintenance and Reliability

Routine inspection of the sensor and its cabling is essential to maintain accuracy. Check for any physical damage, loose connections, or signs of corrosion. The hermetic sealing and stainless steel construction provide excellent resistance to moisture and contaminants, reducing the need for frequent maintenance. By monitoring both vibration and temperature, the 181M6049 helps identify potential issues early, allowing for planned maintenance and reducing the risk of catastrophic failures.

Compatibility and Integration

The 181M6049 is designed to work with Bently Nevada monitoring systems and can be integrated into existing condition monitoring networks. Its standard 3-pin MIL-C-5015 connector ensures compatibility with a wide range of cables and accessories. The sensor's analog output can be connected to data acquisition systems, PLCs, or distributed control systems for continuous monitoring.

Troubleshooting and Common Issues

If the sensor produces erratic readings, first verify the power supply voltage (18-28 Vdc) and current (2-10 mA). Check the cabling for breaks or shorts, and ensure the connector is properly seated. If the temperature reading is incorrect, confirm the sensor is within its measurement range (2° to 120°C). For persistent issues, consult the official Bently Nevada documentation or contact Petro Auto Tech for technical support.

Frequently Asked Questions

Q: What is the sensitivity of the 181M6049?

A: The dynamic sensitivity is 100 mV/g (±5% at 25°C).

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 maximum vibration the sensor can withstand?

A: The vibration limit is 500 g peak, and the shock limit is 5,000 g peak.

Q: What type of connector does the 181M6049 use?

A: It uses a 3-pin MIL-C-5015 style connector.

Product Support and Availability

The Bently Nevada 181M6049 is available through Petro Auto Tech. We offer competitive pricing and fast shipping to keep your operations running smoothly. Contact our team for availability and lead times.