177230-01-01-05 | Bently Nevada Seismic Transmitter 25.4 mm/s

Why Choose the Bently Nevada 177230-01-01-05 Seismic Transmitter?

When rotating equipment fails unexpectedly, unplanned downtime can cost thousands per hour. The 177230-01-01-05 from Bently Nevada helps you avoid that risk by providing continuous, accurate vibration measurement. This seismic transmitter converts vibration into a standard 4-20 mA signal, making it easy to integrate with your existing PLC, DCS, or SCADA system. With a measurement range of 0 to 25.4 mm/s (0 to 1.0 in/s) and a frequency response of 10 Hz to 1 kHz, it covers the most common machinery vibration frequencies. The result is reliable data that supports predictive maintenance and reduces costly surprises.

Key Features and Technical Specifications

The 177230-01-01-05 is built for harsh industrial environments. Its 316L stainless steel case and connector resist corrosion, while the hermetic seal protects internal components from moisture and dust. The transmitter operates in temperatures from -40°C to +85°C and can handle relative humidity up to 100% non-submerged. These features make it suitable for outdoor and washdown applications.

• Measurement Range: 0 to 25.4 mm/s (0 to 1.0 in/s) RMS
• Frequency Response: 10 Hz to 1 kHz (600 to 60 kcpm) ±10%
• Output Signal: 4-20 mA current loop (proportional to RMS vibration)
• Excitation Voltage: 12 to 30 Vdc (current limited to 40 mA)
• Settling Time: Less than 15 seconds within 2% of final value
• Mounted Resonant Frequency: Greater than 12 kHz
• Transverse Sensitivity: Less than 5% of sensitivity
• Case Material: 316L stainless steel
• Connector: 3-pin MIL-C-5015, 316L stainless steel
• Mounting Hole: 1/4-28 UNF (also M6 x 1 SI, M8 x 1.25 SI)
• Mounting Torque: 4 to 7 N-m (35.4 to 62.0 in-lbf)
• Weight: 131 g (4.62 oz) typical
• Approvals: CSA/NRTL/C, ATEX/IECEx (multiple approvals)

One standout feature is the ceramic shear sensing element, which provides excellent stability and accuracy. This design minimizes transverse sensitivity (less than 5%), ensuring that the measurement reflects true radial vibration rather than cross-axis noise. For engineers who demand precise data, this translates into more reliable condition monitoring decisions.

Real-World Applications

The 177230-01-01-05 is ideal for monitoring pumps, fans, motors, and other rotating machinery in industries such as oil and gas, power generation, water treatment, and manufacturing. Because it outputs a standard 4-20 mA loop, it can be directly connected to most control systems without additional signal conditioning. This simplifies installation and reduces total cost of ownership. For example, in a petrochemical plant, you can mount the transmitter on a cooling tower fan and monitor vibration trends over time. Early detection of bearing wear or imbalance allows maintenance teams to schedule repairs during planned outages, avoiding emergency shutdowns.

Installation and Setup

Proper installation is critical for accurate vibration measurement. The transmitter mounts via a 1/4-28 UNF hole or M6/M8 threads. Use the specified mounting torque of 4 to 7 N-m (35.4 to 62.0 in-lbf) to ensure a secure and stable connection. The 3-pin MIL-C-5015 connector simplifies wiring: Pin A is the 4-20 mA positive loop, Pin B is the loop return (common for dynamic signal), and Pin C provides an unbuffered dynamic acceleration signal. Before powering up, verify that your system's power supply is current-limited to 30-35 mA, as recommended by Bently Nevada. This prevents overcurrent damage to the transmitter.

Maintenance and Reliability

Because the 177230-01-01-05 is hermetically sealed and built from stainless steel, it requires minimal maintenance. However, periodic inspection is recommended to ensure the mounting remains tight and the connector is free from corrosion. Check the cable for wear or damage, especially in high-vibration areas. The transmitter's robust design, including a shock survivability of 9.810 m/s² (1.000 g peak) drop test, ensures long-term reliability in demanding environments. By incorporating this transmitter into your condition monitoring program, you can extend machinery life and reduce unplanned downtime—a direct return on investment.

Frequently Asked Questions

Q: What is the output signal of the 177230-01-01-05?

A: The transmitter provides a 4-20 mA current loop output proportional to RMS vibration levels.

Q: What is the measurement range?

A: The measurement range is 0 to 25.4 mm/s (0 to 1.0 in/s) full scale.

Q: What power supply is required?

A: Excitation voltage is 12 to 30 Vdc, with current limited to 40 mA. The system power supply should be current-limited to 30-35 mA.

Q: Is the transmitter suitable for hazardous areas?

A: Yes, it has multiple approvals including CSA/NRTL/C and ATEX/IECEx.

Q: What is the frequency response?

A: The frequency response is 10 Hz to 1 kHz (600 to 60 kcpm) ±10%.

Product Support and Availability

The 177230-01-01-05 is available through Petro Auto Tech, a trusted industrial automation parts supplier. We stock this item and can ship it promptly to minimize your downtime. For technical questions or to verify compatibility with your system, contact our team—we're here to help.