Bently Nevada 991-25-50-01-00 991 Series Thrust Transmitter

Product Overview

The Bently Nevada 991-25-50-01-00 provides high-accuracy axial displacement monitoring for critical industrial machinery. This transmitter drives a 3300 XL 8mm proximity probe and translates the complex eddy current signal into a linear 4 to 20 mA output. This allows for seamless integration of thrust data into your PLC or DCS without the need for a dedicated monitor rack. We supply this unit as 100% Brand New and Original, manufactured in the U.S.A. and delivered in factory-sealed packaging.

Part Number Breakdown

The 991-25-50-01-00 utilizes a specific configuration to match your machine's mechanical stroke and cable routing requirements:

Technical Specifications

The following parameters define the operational limits and output characteristics of the 991-25-50-01-00:

• Output Signal: 4 to 20 mA DC (proportional to axial thrust position)

• Measurement Range: 25-0-25 mils

• Electrical System Length: 5.0 meters (Probe + Extension Cable)

• Mounting Type: Integrated 35 mm DIN-rail clips

• Power Input: +17.5 to +30 Vdc

• Origin: Made in U.S.A.

• Shipping Weight: 2 kg (including factory packaging)

Engineering Advantages

• Extended Axial Range: The "25" full-scale option provides a wider 25-0-25 mil range. This extra headroom accommodates machines with significant thermal growth or larger axial clearances that standard transmitters might clip or fail to track.

• Simplified Rack-less Protection: This transmitter eliminates the infrastructure costs of a centralized monitoring rack. It sends thrust data directly to your control system, making it an ideal choice for balance-of-plant equipment like small turbines, pumps, and fans.

• Rapid Cabinet Installation: The 01 mounting option features pre-installed 35 mm DIN-rail clips. Technicians can snap the unit onto a standard rail in seconds, significantly reducing wiring time and labor in high-density control cabinets.

• Precision Signal Conditioning: Engineered with advanced interference rejection, the unit maintains signal integrity in electrically noisy environments. This ensures your PLC receives a stable, reliable 4-20 mA loop even when located near high-voltage motor starters.

FAQs

• Can I use this with a 9.0-meter probe system?

  No. This transmitter is specifically calibrated for a 5.0-meter electrical system length. Using a 9.0-meter probe or cable will result in incorrect position data and potential false trips.

• Does this unit replace a 3300 XL Proximitor?

  Yes. The 991-25-50-01-00 performs the same driving function as a Proximitor but adds the signal conditioning necessary to output a 4-20 mA current loop instead of a raw voltage signal.

• How do I perform field diagnostics on this unit?

  Each transmitter includes a BNC connector providing a raw buffered signal. You can connect a portable vibration analyzer to this port to verify the probe gap and view shaft behavior without interrupting the primary 4-20 mA protection loop.

• Is this product used or refurbished?

  Absolutely not. We deliver only Brand New and Original Bently Nevada equipment in original factory boxes. Every unit includes the manufacturer's standard 12-month warranty.