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

What Is the 181M6049?

When unplanned downtime threatens production targets, the 181M6049 from Bently Nevada provides the data you need to act early. This dual output sensor combines accelerometer and temperature sensing in one rugged package, reducing installation complexity and cost. With a sensitivity of 100 mV/g, it captures even subtle vibration changes that indicate bearing wear or imbalance.

Designed for harsh industrial environments, the 181M6049 operates across a wide temperature range and delivers reliable performance for years. By integrating two measurements into one device, you reduce spare parts inventory and installation labor, directly improving your maintenance budget.

Key Features and Performance Metrics

The 181M6049 is engineered for accuracy and durability. Its key specifications include:

• 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, 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
• Case isolated, internally shielded
• 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 standout feature is the dual output capability. This sensor provides both vibration and temperature data from a single mounting point, cutting installation time and material costs. Additionally, the hermetic sealing and stainless steel construction extend service life, reducing replacement frequency and total ownership cost.

Applications and Use Cases

The 181M6049 is ideal for rotating machinery monitoring in industries such as oil and gas, power generation, and manufacturing. Use it on pumps, motors, fans, and compressors to detect early signs of failure. Because it measures temperature alongside vibration, it helps identify overheating bearings or lubrication issues before they cause catastrophic damage.

For example, in a continuous process plant, installing the 181M6049 on critical pumps allows maintenance teams to schedule repairs during planned outages rather than emergency shutdowns. This proactive approach lowers repair costs and avoids production losses. The sensor's wide frequency range also makes it suitable for both low-speed and high-speed equipment.

Installation and Setup

Proper mounting is essential for accurate readings. The 181M6049 uses a ¼-28 UNF tapped hole, ensuring a secure and repeatable installation. For best results, mount the sensor directly on the machine surface, ensuring good contact and minimal surface roughness. Use the recommended cabling options—16925-XX without armor or 16710-XX with armor—to protect the signal from interference.

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 for torque and cable routing to avoid stress on the connector.

Maintenance and Reliability

Regular inspection of the sensor and its cabling helps maintain measurement accuracy. Check for loose mounting, damaged cables, or corrosion, especially in harsh environments. Because the sensor is hermetically sealed, it resists moisture and contaminants, reducing maintenance needs. The stainless steel case withstands corrosive atmospheres, further extending service life.

By investing in a reliable sensor like the 181M6049, you reduce the frequency of replacements and associated labor costs. Its robust design minimizes false readings, allowing your condition monitoring system to operate efficiently and avoid unnecessary downtime.

Compatibility and Integration

The 181M6049 is designed to work with Bently Nevada monitoring systems and compatible data acquisition equipment. Its standard 3-pin MIL-C-5015 connector simplifies integration into existing setups. The sensor's 100 mV/g sensitivity matches common vibration monitoring inputs, making it a drop-in replacement for many applications.

For new installations, the dual output eliminates the need for separate temperature sensors, simplifying system design and reducing wiring complexity. This integration saves both installation time and component costs.

Troubleshooting and Common Issues

If you encounter inconsistent readings, first check the mounting torque and surface condition. A loose mount can cause signal distortion. Also inspect the cable for damage or loose connections, as these can introduce noise. Verify that the voltage source is within the 18-28 Vdc range and that the current regulating diode is functioning correctly.

Should the temperature sensor output appear incorrect, confirm that the measurement range (2° to 120°C) is not exceeded. For persistent issues, consult the official Bently Nevada documentation or contact Petro Auto Tech for technical support.

FAQ

Q: What is the sensitivity of the 181M6049?

A: The 181M6049 has a dynamic sensitivity of 100 mV/g ±5% at 25°C.

Q: What temperature range does the 181M6049 support?

A: It operates from -50°C to +120°C, with the temperature sensor measuring from 2° to 120°C.

Q: What is the output impedance of the 181M6049?

A: The maximum output impedance is 100 Ω.

Q: What cabling options are available for the 181M6049?

A: Recommended cabling includes 16925-XX without armor and 16710-XX with armor.

Support and Availability

The 181M6049 is available from Petro Auto Tech, your trusted industrial automation parts supplier. We ensure genuine components and fast delivery to minimize your downtime. Contact our team for pricing and availability, and we will help you secure this essential sensor for your operation.