177230-00-02-05 | Bently Nevada 0-12.7 mm/s Seismic Transmitter

Introduction: Solving Vibration Monitoring Challenges

When rotating machinery begins to vibrate unexpectedly, the 177230-00-02-05 from Bently Nevada provides the precise measurement you need. This seismic transmitter converts vibration velocity into a standard 4-20 mA current loop signal, enabling seamless integration with PLCs, DCS, and SCADA systems. Designed for continuous operation in harsh environments, it offers a measurement range of 0 to 12.7 mm/s (0 to 0.5 in/s) and a frequency response of 3 Hz to 1 kHz (180 to 60 kcpm) peak. With its robust 316L stainless steel case and hermetically sealed sensor, this transmitter ensures dependable performance where it matters most.

Key Features & Technical Specifications

The 177230-00-02-05 is engineered for accuracy and durability. Below are the core specifications extracted from the official datasheet:

• Measurement Range: 0 to 12.7 mm/s (0 to 0.5 in/s) full scale, ±10%
• Frequency Response: 3 Hz to 1 kHz (180 to 60 kcpm) ±10%
• Output Signal: 4 to 20 mA current loop, proportional to peak vibration levels
• 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
• Sensing Element: Ceramic / Shear
• 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)
• Operating Temperature: -40°C to +85°C (-40°F to +185°F)
• Relative Humidity: Up to 100% non-submerged
• Electrical Isolation: Greater than 10^8 ohms
• Isolation Breakdown Voltage: 600 Vrms with less than 1 mA leakage
• Shock Survivability: 9.810 m/s² (1.000 g peak) maximum drop test
• Magnetic Field Sensitivity: Less than 20 μm/s/gauss (790 μin/s/gauss) peak
• Weight: 0.131 kg (4.62 oz) typical

One distinctive spec is the hermetically sealed sensor, which protects against moisture and contaminants, ensuring long-term reliability in humid or washdown environments. This feature, combined with the 316L stainless steel construction, makes the transmitter ideal for demanding industrial applications.

Applications & Use Cases

The 177230-00-02-05 is designed for vibration monitoring on rotating equipment such as pumps, motors, fans, and compressors. Its 4-20 mA output integrates directly with existing control systems, enabling real-time condition monitoring and predictive maintenance. For example, in a petrochemical plant, the transmitter can detect early bearing wear, allowing maintenance teams to schedule repairs before catastrophic failure occurs. Furthermore, its multiple approvals (CSA/NRTL/C, ATEX/IECEx) make it suitable for hazardous area installations, providing peace of mind in explosive atmospheres.

Installation & Setup

Proper installation is critical for accurate vibration measurement. The transmitter mounts via a 1/4-28 UNF threaded hole or M6/M8 metric threads. Apply the specified mounting torque of 4 to 7 N-m to ensure a secure and stable connection. The 3-pin MIL-C-5015 connector simplifies wiring: Pin A connects to the 4-20 mA positive loop, Pin B to the loop return, and Pin C provides an unbuffered dynamic acceleration signal. Always verify that the excitation voltage is within 12 to 30 Vdc and that the current is limited to 40 mA, as specified. For best results, follow the manufacturer's installation manual and use shielded cable to minimize electromagnetic interference.

Maintenance & Reliability

Routine maintenance of the 177230-00-02-05 is straightforward. Because the sensor is hermetically sealed, it requires no internal cleaning or adjustment. Periodically inspect the connector and mounting for signs of corrosion or loosening, especially in high-vibration environments. Verify the output signal at zero and full scale using a calibrated current source to ensure accuracy. With proper care, this transmitter offers extended service life, reducing downtime and maintenance costs—a key benefit for cost-conscious operations.

Compatibility & Integration

The transmitter's 4-20 mA output is universally compatible with PLCs, DCS, and SCADA systems that have internal power supplies typically current-limited to 30-35 mA. It also provides a dynamic acceleration signal on Pin C, which can be used for additional diagnostics when connected to compatible monitoring equipment. This dual-output capability enhances its versatility in both continuous monitoring and portable data collection applications.

Common Questions About the 177230-00-02-05

Q: What is the measurement range of the 177230-00-02-05?

A: The measurement range is 0 to 12.7 mm/s (0 to 0.5 in/s) full scale, with an accuracy of ±10%.

Q: What output signal does the transmitter provide?

A: It provides a 4 to 20 mA current loop signal from Pin A to Pin B, proportional to peak vibration levels.

Q: Can the 177230-00-02-05 be used in hazardous areas?

A: Yes, it has multiple approvals including CSA/NRTL/C and ATEX/IECEx, making it suitable for explosive atmospheres.

Q: What is the operating temperature range?

A: The operating temperature range is -40°C to +85°C (-40°F to +185°F).

Q: How is the transmitter mounted?

A: It can be mounted via a 1/4-28 UNF threaded hole or M6 x 1 SI and M8 x 1.25 SI threads, with a recommended torque of 4 to 7 N-m.

Product Support & Availability

The 177230-00-02-05 is available through Petro Auto Tech, your trusted industrial automation parts supplier. We maintain a ready inventory to ensure fast delivery. For lifecycle status or technical assistance, please contact our team—we're here to help you keep your operations running smoothly.