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

What Makes the 181M6049 Dual Output Sensor Essential?

When machinery vibration and temperature threaten uptime, the 181M6049 from Bently Nevada provides a reliable dual output solution. This sensor combines accelerometer and temperature sensing in one rugged package, reducing installation complexity and improving data accuracy.

With a dynamic sensitivity of 100 mV/g and an acceleration range of 60 g peak, the 181M6049 captures critical vibration data across a wide operating spectrum. Its integrated temperature sensor outputs 10 mV/°C over a measurement range of 2° to 120°C, enabling comprehensive machine health monitoring from a single point.

Key Features and Technical Specifications

• 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 maximum
• Temperature response: -10% at -50°C, +10% at +120°C
• Voltage source: 18-28 Vdc
• Current regulating diode: 2-10 mA
• Broadband electrical noise: 700 µg (2.5 Hz to 25 kHz)
• Output impedance: 100 Ω maximum
• 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 case-isolated, internally shielded design that minimizes electromagnetic interference. Its PZT ceramic shear sensing element ensures stable, repeatable measurements even in harsh environments.

Applications and Use Cases

Industrial facilities rely on the 181M6049 for critical rotating machinery monitoring, including pumps, fans, compressors, and motors. The dual output capability allows simultaneous vibration and temperature tracking, which helps detect bearing wear, misalignment, and overheating before they cause unplanned downtime.

In predictive maintenance programs, this sensor provides the data needed to schedule repairs efficiently. The wide temperature range and hermetic sealing make it suitable for demanding outdoor or process environments.

Installation and Setup

Mount the 181M6049 using the ¼-28 UNF tapped hole for secure attachment to the machine surface. Ensure the mounting surface is clean and flat to achieve accurate frequency response. For cabling, Bently Nevada recommends 16925-XX (without armor) or 16710-XX (with armor) cables to maintain signal integrity.

Connect the 3-pin MIL-C-5015 connector according to the pin functions: shell for ground/case, 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

The 181M6049 is designed for long-term reliability with a hermetic seal and 316L stainless steel case. Periodic inspection of the mounting and cable connections helps maintain measurement accuracy. Check for any signs of physical damage or corrosion, especially in harsh environments.

Because the sensor has no moving parts, maintenance is minimal. Regularly verify the output signals against known reference values to ensure the sensor continues to perform within specifications.

Compatibility and Integration

The 181M6049 integrates seamlessly with Bently Nevada monitoring systems and other data acquisition equipment that accepts standard accelerometer inputs. The dual output (vibration and temperature) simplifies wiring and reduces the number of sensors required per measurement point.

Its 100 Ω output impedance and bias voltage of 12 Vdc make it compatible with most industrial vibration monitoring modules. For specific system integration details, consult the Bently Nevada documentation or contact Petro Auto Tech.

Frequently Asked Questions

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

A: The 181M6049 offers ±5% response from 3 to 5,000 Hz, ±10% from 1 to 7,000 Hz, and ±3 dB from 0.5 to 12,000 Hz.

Q: What is the temperature measurement range?

A: The temperature sensor measures from 2° to 120°C with an output sensitivity of 10 mV/°C.

Q: What power supply is required?

A: The sensor operates with 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, 316L stainless steel case, and operates from -50°C to +120°C.

Q: What cabling is recommended?

A: Use Bently Nevada cables 16925-XX (without armor) or 16710-XX (with armor) for optimal performance.

Product Support and Availability

The Bently Nevada 181M6049 is available through Petro Auto Tech. Contact our team for current pricing, lead times, and technical support. We are ready to assist with your machinery monitoring needs.