BENTLY 991-01-XX-01-00 288865-01

Description

Product Overview

Product Parameters

• Sensor Performance Characteristics:
  • Sensor Type: Inductive (eddy current) sensor for measuring vibration and relative position;
  • Measured Parameters: Vibration (radial/axial), rotor relative position, rotational speed;
  • Vibration Measurement Range: 0–254 μm (peak value);
  • Position Measurement Range: 0–5 mm (relative distance to rotor);
  • Speed Measurement Range: 0–3600 rpm (for rotational speed monitoring);
  • Frequency Range: 0.1–10,000 Hz (for detecting low-frequency and high-frequency vibrations);
  • Sensitivity: 8 mV/μm (for accurate detection of small vibration amplitudes);
  • Measurement Accuracy: ±1% of full scale (at 25 ±5 °C).
• Signal Output & Communication Characteristics:
  • Output Signal Type: Analog (4–20 mA DC) for vibration/position, digital (TTL) for speed;
  • Rated Supply Voltage: 12–24 V DC ±10%;
  • Current Consumption: ≤20 mA (no load on output signal);
  • Calibration Interface: RS485 (via Bently Nevada Calibration Tool software);
  • CMS Compatibility: BENTLY 3500, Emerson CSI 6500, ABB AssetVista;
  • Connection Type: Hermetic M12 connectors (dust and moisture protection).
• Protection & Operating Characteristics:
  • Enclosure Protection Class: IP67 (full dust protection, immersion in water up to 1 m for 30 minutes);
  • Housing Material: 316L stainless steel (resistant to corrosion, acids, and alkalis);
  • Operating Temperature Range: -50 °C to +120 °C (extreme temperatures in turbine environments);
  • Vibration Resistance: 500 m/s² (10–2000 Hz, compliant with MIL-STD-883H);
  • Shock Resistance: 1000 m/s² (11 ms duration, IEC 60068-2-27);
  • EMC Protection: EN 61326-1 (Category 4), MIL-STD-461G (electromagnetic compatibility for military and industrial systems).
• Additional Parameters:
  • Calibration Interval: 2 years (recommended accuracy verification cycle);
  • Mounting Type: Threaded (M16 × 1.5) or flanged (on request);
  • Self-Diagnostic Functions: Sensor status monitoring, fault signal (22 mA output current);
  • Warranty Period: 3 years (when installed and operated per specifications).

Advantages & Features

• High Sensitivity & Accuracy: With 8 mV/μm sensitivity and ±1% accuracy, the BENTLY 991-01-XX-01-00 288865-01 detects even microscopic vibrations. For example, in a power plant turbine, it identifies bearing wear when vibration amplitude reaches just 5 μm — 2–3 months earlier than standard sensors — allowing time for planned maintenance and avoiding unplanned downtime.
• Extreme Environmental Stability: The -50 °C to +120 °C operating temperature range and 316L stainless steel housing make the BENTLY 991-01-XX-01-00 288865-01 suitable for harsh conditions. It withstands -45 °C winter temperatures at northern oil and gas fields and resists corrosion from aggressive gases (methane, propane) in compressor stations.
• CMS Integration Capability: Compatibility with BENTLY 3500 monitors and System 1 software simplifies data analysis for the BENTLY 991-01-XX-01-00 288865-01. Operators can track vibration trends in real time, receive automatic alerts when thresholds are exceeded, and generate equipment status reports — reducing analysis time by 40%.
• Self-Diagnostic Functions: The fault signal (22 mA current) alerts users to sensor issues. If the BENTLY 991-01-XX-01-00 288865-01 detects sensor damage or wiring breaks, it immediately sends a signal to the CMS, preventing data loss and false alarms.
• Flexible Mounting Options: Threaded or flanged mounting adapts the BENTLY 991-01-XX-01-00 288865-01 to different equipment types. Threaded mounting is ideal for turbines with limited space, while flanged mounting (with extra sealing) suits compressors with high vibration levels. Additional mounting recommendations are available at: [Product link for BENTLY 991-01-XX-01-00 288865-01].

Application Cases by Industry

• Power Generation (Thermal Power Plants): In a 300 MW steam turbine at a thermal power plant, the BENTLY 991-01-XX-01-00 288865-01 monitors rotor radial vibration (0–100 μm range) and relative position (0–3 mm range), transmitting data to a BENTLY 3500 monitor. When vibration reaches 25 μm (warning threshold), the system alerts operators, who schedule bearing replacement within 2 months — avoiding an emergency turbine shutdown (costing over €1 million). Specific cases are available at: [Product link for BENTLY 991-01-XX-01-00 288865-01].
• Oil & Gas (Compressor Stations): At a natural gas transmission compressor station, the BENTLY 991-01-XX-01-00 288865-01 monitors compressor axial vibration and rotational speed (0–3000 rpm). Its IP67 rating protects it from dust and rain in outdoor installations, while corrosion resistance prevents damage from gas emissions.
• Metallurgy (Rolling Mill Electric Motors): On a 500 kW electric motor in a rolling mill, the BENTLY 991-01-XX-01-00 288865-01 detects vibrations caused by rotor wear or imbalance, sending signals to an ABB AC 800M controller. If vibration exceeds 50 μm, the mill automatically reduces speed to prevent motor failure.
• Chemical Industry (Reactor Agitators): In a plastic production reactor, the BENTLY 991-01-XX-01-00 288865-01 monitors agitator position. If the agitator shifts 2 mm from its rotational axis, the sensor triggers a fault signal, stopping the reactor and preventing tank rupture.

Comparison with Competitors

Selection Recommendations & Precautions

• Selection Recommendations:
  1. For monitoring critical turbines and compressors: Choose the BENTLY 991-01-XX-01-00 288865-01 for its 8 mV/μm sensitivity, which detects component wear at an early stage. Sensors with 5–6 mV/μm sensitivity only alert to issues when damage is already significant.
  2. For equipment in extreme temperatures (-50–+120 °C): The BENTLY 991-01-XX-01-00 288865-01 is the preferred choice, as competitors have narrower temperature ranges and may fail in low or high temperatures.
  3. For outdoor installations (compressor stations, oil fields): The IP67 rating of the BENTLY 991-01-XX-01-00 288865-01 protects it from rain and dust, unlike IP65 models that require additional enclosures. Details on CMS compatibility are available at: [Product link for BENTLY 991-01-XX-01-00 288865-01].
• Precautions:
  1. Maintain rotor distance: The minimum distance between the sensor and rotor must be 0.5 mm. Contact between the rotor and BENTLY 991-01-XX-01-00 288865-01 will damage the sensor element, requiring replacement.
  2. Use recommended cables: Cables must have a PTFE sheath (for high-temperature resistance). Standard cables degrade at +120 °C, causing signal breaks.
  3. Calibrate regularly: Do not exceed the 2-year calibration interval. Loss of accuracy in the BENTLY 991-01-XX-01-00 288865-01 can lead to false alerts or missed faults.
  4. Mount on rigid surfaces: Install the sensor on rigid equipment parts (e.g., turbine casings), not flexible components (e.g., supports). Vibrations in flexible parts will distort measurements and reduce data reliability.

991-01-XX-01-00 288865-01