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

Introduction to the 181M6049

When machinery vibration threatens uptime, the 181M6049 from Bently Nevada provides a reliable dual output solution. This sensor combines accelerometer and temperature sensing in one compact unit, simplifying installation and reducing wiring complexity.

With a sensitivity of 100 mV/g and a wide frequency response, this sensor is engineered for demanding industrial environments. Its rugged 316L stainless steel case and hermetic sealing ensure long-term performance even in harsh conditions.

Key Features and Technical Specifications

The 181M6049 offers several standout specifications:

• Dynamic sensitivity of 100 mV/g (±5% at 25°C)
• Acceleration range of 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 of 30 kHz
• Temperature sensor output sensitivity of 10 mV/°C
• Temperature measurement range of 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 and internally shielded
• Operating temperature range: -50°C to +120°C
• Vibration limit: 500 g peak
• Shock limit: 5,000 g peak
• Hermetic sealing
• 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, which allows simultaneous measurement of vibration and temperature from a single mounting point. This reduces sensor count and installation time, making it a cost-effective choice for condition monitoring.

Applications and Use Cases

In rotating machinery such as pumps, fans, and motors, the 181M6049 provides critical data for predictive maintenance. By monitoring both vibration and temperature, operators can detect bearing wear, misalignment, and lubrication issues early, preventing unplanned downtime.

Furthermore, the sensor's wide frequency response makes it suitable for both low-speed and high-speed equipment. Its robust design ensures reliable operation in extreme temperatures, making it ideal for outdoor or process-critical installations.

Installation and Setup

Mounting the 181M6049 is straightforward with its ¼-28 UNF tapped hole. Ensure the mounting surface is clean and flat for optimal coupling. The sensor connects via a 3-pin MIL-C-5015 style connector; recommended cabling includes 16925-XX (without armor) or 16710-XX (with armor).

Wire the connector as follows: Shell and pin A for accelerometer power/signal, pin B for accelerometer and temperature sensor common, and pin C for temperature sensor signal. Verify the voltage source is within 18-28 Vdc before powering the sensor.

Maintenance and Reliability

Regularly inspect the sensor and cabling for damage or wear. Check that the mounting bolt remains tight to maintain accurate readings. The hermetic sealing protects internal components from moisture and contaminants, reducing maintenance needs.

Given the sensor's robust construction, it can withstand harsh environments, but periodic verification of output signals is recommended to ensure consistent performance.

Compatibility and Integration

The 181M6049 is designed to work with Bently Nevada monitoring systems and other data acquisition equipment that accept standard accelerometer inputs. Its 100 mV/g sensitivity and low output impedance make it compatible with most vibration monitoring modules.

For temperature readings, the sensor provides a 10 mV/°C output, which can be integrated into existing temperature monitoring channels. Always consult the system manual to confirm compatibility.

Troubleshooting and Common Issues

If the sensor fails to provide a signal, check the wiring connections and verify the supply voltage. A common issue is loose mounting, which can cause inaccurate readings. Ensure the sensor is securely fastened.

If temperature readings seem off, verify the temperature sensor range and calibration. For persistent issues, consult the official Bently Nevada documentation or contact Petro Auto Tech for support.

FAQ

Q: What is the sensitivity of the 181M6049?

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

Q: What is the temperature measurement range?

A: The temperature sensor measures from 2° to 120°C.

Q: What is the recommended cabling for the 181M6049?

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

Q: What is the mounting thread size?

A: The sensor mounts with a ¼-28 UNF tapped hole.

Q: Is the sensor case isolated?

A: Yes, the case is isolated and internally shielded.

Product Support and Availability

The 181M6049 is available through Petro Auto Tech. Please verify current lifecycle status and availability with Petro Auto Tech before ordering. Our team can assist with technical questions and expedite your order.