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

Introduction to the Bently Nevada 181M6049 Dual Output Sensor

When machine health is critical, the 181M6049 from Bently Nevada provides a dependable solution. This dual output sensor combines accelerometer and temperature sensing in one compact unit. It is designed for industrial environments where both vibration and temperature data are essential for predictive maintenance.

With a sensitivity of 100 mV/g at 25°C, the 181M6049 offers accurate vibration measurement. Its temperature sensor output of 10 mV/°C enables continuous thermal monitoring. This dual functionality reduces the need for separate sensors, simplifying installation and lowering overall costs.

Key Features and Technical Specifications

The 181M6049 is engineered for performance and durability. Below are its core specifications, all traceable to 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
• Temperature Sensor Output: 10 mV/°C
• Temperature Measurement Range: 2° to 120°C
• Voltage Source: 18-28 Vdc
• Current Regulating Diode: 2-10 mA
• Output Impedance: 100 Ω max
• 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

The 181M6049 features a PZT ceramic shear sensing element, which provides excellent stability and accuracy. Its case-isolated, internally shielded grounding minimizes electrical interference, ensuring clean signals.

Applications and Use Cases

The 181M6049 is well-suited for rotating machinery monitoring, including pumps, motors, fans, and compressors. By providing both vibration and temperature data, it helps maintenance teams detect early signs of bearing wear, misalignment, and overheating. This proactive approach reduces unplanned downtime and extends equipment life.

For example, in a chemical plant, the 181M6049 can monitor a critical pump. If vibration levels rise or temperature spikes, operators receive alerts, allowing them to schedule maintenance before failure occurs. This not only improves safety but also optimizes maintenance budgets.

Installation and Setup

Proper installation is key to accurate readings. The 181M6049 mounts via a ¼-28 UNF tapped hole, ensuring a secure and rigid connection. Use the recommended cabling options: 16925-XX without armor or 16710-XX with armor, depending on environmental conditions.

Ensure the mounting surface is clean and flat to avoid strain on the sensor. Tighten the sensor to the specified torque to prevent loosening due to vibration. Connect the 3-pin MIL-C-5015 connector as per the pinout: Shell for ground/case, A for accelerometer power/signal, B for common, and C for temperature sensor signal.

Maintenance and Reliability

The 181M6049 is built for long-term reliability. Its hermetic sealing protects internal components from moisture and contaminants. The 316L stainless steel case resists corrosion, making it suitable for harsh industrial environments.

Periodic inspection is recommended to ensure the sensor remains securely mounted and the cable is undamaged. Check for any signs of wear or corrosion on the connector. Regular verification of output signals against a known reference can help detect drift.

By following these simple practices, you can maximize the sensor's lifespan and maintain accurate monitoring. The 181M6049's robust design minimizes maintenance needs, contributing to lower total cost of ownership.

Compatibility and Integration

The 181M6049 is compatible with Bently Nevada monitoring systems that accept standard accelerometer inputs. Its 100 mV/g sensitivity and 12 Vdc bias voltage make it suitable for many data acquisition and condition monitoring platforms.

For seamless integration, use the specified cabling (16925-XX or 16710-XX) to maintain signal integrity. The sensor's case-isolated design prevents ground loops, ensuring reliable data transmission.

Frequently Asked Questions

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

A: The frequency response is ±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 a current regulating diode of 2-10 mA.

Q: Is the 181M6049 suitable for harsh environments?

A: Yes, it has a hermetic seal, a 316L stainless steel case, and operates from -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 181M6049 is available through Petro Auto Tech, a trusted industrial automation parts supplier. Contact Petro Auto Tech for current availability and pricing. Please verify the product's lifecycle status before ordering.