BENTLY 990-04-50-01-00

Description

1. Detailed parameter table

BENTLY 990-04-50-01-00

2. Product introduction

The BENTLY NEVADA 990-04-50-01-00 is a high-performance Proximitor Sensor System, engineered to provide precise non-contact measurement of shaft position, vibration, and speed in industrial machinery. As a key component in BENTLY’s renowned condition monitoring portfolio, it integrates seamlessly with 3300 series proximity probes to deliver reliable data for machinery protection and diagnostics.

This system operates by converting the high-frequency AC signal from proximity probes into a stable DC output (0 to 10 V), which is proportional to the gap between the probe tip and the target shaft. In rotating equipment such as turbines, compressors, and motors, the 990-04-50-01-00 acts as a critical interface between sensors and control systems. It translates raw sensor data into actionable insights, enabling operators to monitor shaft displacement, detect misalignment, and predict potential failures—ultimately minimizing downtime and maximizing equipment lifespan.

3. Core advantages and technical highlights

Non-contact precision: The 990-04-50-01-00 eliminates mechanical wear by using non-contact measurement, ensuring long-term accuracy even in high-speed applications. In a gas turbine, for example, it can measure shaft vibration within ±0.1% of full scale, detecting minute deviations that signal bearing degradation or imbalance.

Wide temperature tolerance: With an operating range of -30°C to +85°C, the system thrives in harsh industrial environments. In steel mills, where ambient temperatures near furnaces exceed 60°C, the 990-04-50-01-00 maintains stable performance, outperforming standard sensors that drift or fail under heat stress.

Robust signal processing: Its advanced electronics filter noise and interference, ensuring clean output signals. In power plants with high electromagnetic interference (EMI) from generators, the system rejects noise above 10 kHz, providing reliable data for vibration analysis and control system integration.

Easy integration: Designed to work with 3300 series probes, the 990-04-50-01-00 simplifies retrofits and upgrades. Its standardized 0 to 10 V output connects directly to PLCs, DCS, and data acquisition systems, reducing setup time in both new installations and existing machinery.

4. Typical application scenarios

Turbine monitoring: In combined-cycle power plants, the 990-04-50-01-00 is paired with 3300 probes to monitor steam turbine shaft position. By tracking axial displacement, it alerts operators to thrust bearing wear—critical for preventing catastrophic shaft collisions. A single system can monitor both radial vibration and axial position, providing a comprehensive view of turbine health.

Compressor diagnostics: In oil and gas refineries, reciprocating compressors rely on the 990-04-50-01-00 to measure crankshaft vibration. The system’s high-frequency response captures rapid oscillations caused by valve wear, enabling predictive maintenance before unplanned shutdowns occur. Its IP65 rating ensures durability in dusty, moisture-prone compressor rooms.

Motor protection: In manufacturing facilities, electric motors driving conveyor systems use the 990-04-50-01-00 to detect rotor misalignment. By monitoring shaft runout, the system triggers alarms when vibration exceeds safe thresholds, preventing motor burnout and costly production halts.

BENTLY 990-04-50-01-00

5. Related model recommendations

330103-00-05-10-02-00: A 3300 series proximity probe designed for use with the 990-04-50-01-00. It offers a 5 mm measuring range, ideal for monitoring small to medium shaft displacements.

990-06-50-01-00: A higher-power variant of the 990-04-50-01-00, suitable for applications requiring longer cable runs (up to 30 meters) without signal loss.

3500/40M Proximitor Monitor: Integrates with the 990-04-50-01-00 to process vibration data and trigger alarms in the 3500 machinery protection system, enhancing turbine and compressor safety.

136188-02: A shielded sensor cable that connects the 990-04-50-01-00 to probes, minimizing EMI and ensuring signal integrity in high-noise environments.

990-04-50-02-00: An upgraded version of the 990-04-50-01-00 with extended frequency response (0 to 15 kHz), designed for high-speed machinery like centrifuges.

6. Installation, commissioning and maintenance instructions

Installation preparation: Before installing the 990-04-50-01-00, verify the -24 V DC power supply is stable and grounded. Use a torque wrench to mount the system to a vibration-free surface (maximum 25 Nm) to avoid measurement interference. Ensure probe cables (e.g., 136188-02) are routed away from high-voltage lines to prevent EMI. Calibrate the gap voltage using a feeler gauge: set the probe tip 0.5 mm from the target, then adjust the system to output 5 V DC at this nominal position.

Maintenance suggestions: Inspect the 990-04-50-01-00 quarterly for dust or moisture ingress (clean with a dry cloth if needed). Check cable connections monthly for corrosion—replace connectors if resistance exceeds 1 ohm. Annually, verify output linearity using a calibration fixture: apply 0.1 mm gap increments and confirm voltage changes by 0.2 V per step. If drift exceeds ±0.5%, replace the internal signal conditioning board with BENTLY’s genuine part (P/N 990-04-50-99-00) to maintain accuracy.

7. Service and guarantee commitment

BENTLY NEVADA backs the 990-04-50-01-00 with a 2-year warranty, covering defects in materials and workmanship. Their global technical support team provides 24/7 assistance for installation, calibration, and troubleshooting via phone or email. Customers receive access to online resources, including calibration manuals and compatibility guides. For critical applications, BENTLY offers on-site commissioning services to ensure optimal performance. Spare parts are guaranteed for 10 years post-production, ensuring long-term support for industrial fleets relying on the 990-04-50-01-00 for machinery protection.