Bently Nevada 177230-02-02-05 Seismic Transmitter for Vibration Monitoring

Product Overview

When unplanned downtime threatens production targets, the Bently Nevada 177230-02-02-05 seismic transmitter provides the critical vibration data needed to protect rotating machinery. This industrial-grade transmitter converts mechanical vibration into a standard 4-20 mA current loop signal, enabling seamless integration with PLCs, DCS, and SCADA systems. Designed for harsh environments, it delivers reliable performance in applications ranging from pumps and fans to turbines and compressors.

Technical Specifications

The 177230-02-02-05 offers a measurement range of 0–50.8 mm/s (0–2.0 in/s) peak, with a frequency response of 3 Hz to 1 kHz (180 to 60 kcpm) peak. Its 4-20 mA output loop provides a linear representation of vibration velocity, with a full-scale range option of 25.4 mm/s (1.0 in/s) ±10%. The transmitter operates on an excitation voltage of 12 to 30 Vdc, current-limited to 40 mA, and features a settling time of less than 15 seconds within 2% of final value. Key physical specs include a diameter of 25.4 mm (1.00 in), height of 66.0 mm (2.60 in), and weight of 0.131 kg. The case and connector are made of 316L stainless steel, with a 3-pin MIL-C-5015 connector and 1/4-28 UNF mounting hole. Environmental limits include an operating temperature range of -40°C to +85°C (-40°F to +185°F) and relative humidity up to 100% non-submerged. The transmitter is hermetically sealed and carries multiple approvals: CSA/NRTL/C, ATEX/IECEx.

Industry Applications

In oil and gas refineries, the 177230-02-02-05 monitors critical pumps and compressors, providing early warning of bearing wear or imbalance. Its wide frequency response captures both low-speed and high-speed vibration events, making it suitable for steam turbines and gearboxes. For water treatment facilities, the transmitter's 100% humidity tolerance ensures reliable operation in wet environments. The 4-20 mA output simplifies integration with existing control systems, reducing retrofit costs.

Installation & Setup Guidance

Mount the transmitter using the 1/4-28 UNF hole or optional M6 x 1 SI or M8 x 1.25 SI threads, applying a torque of 4 to 7 N-m (35.4 to 62.0 in-lbf). Connect Pin A to the 4-20 mA positive loop and Pin B to the loop return. Pin C provides an unbuffered dynamic acceleration signal for diagnostic use. Ensure the excitation voltage is within 12 to 30 Vdc and that the loop current is limited to 40 mA. Allow up to 15 seconds for the output to stabilize after power-up.

Maintenance & Reliability

The hermetically sealed sensor and 316L stainless steel construction provide excellent corrosion resistance and long-term reliability. No routine maintenance is required beyond periodic inspection of the connector and mounting integrity. The transmitter's transverse sensitivity of less than 5% of sensitivity ensures accurate readings even in the presence of cross-axis vibration. For safety-rated installations, follow the manufacturer's safety manual for periodic testing.

Selection Guide & Purchasing Advice

Before ordering the 177230-02-02-05, verify the required measurement range and frequency response for your application. The standard range is 0–50.8 mm/s, but a full-scale option of 25.4 mm/s is available. Confirm that your control system accepts a 4-20 mA input and that the excitation voltage is compatible. For replacement or upgrade projects, the transmitter's compact size and standard mounting threads simplify installation. BluePLC Industrial offers this model with fast shipping and expert support to ensure you get the right part for your machinery monitoring needs.