Product Introduction
In harsh industrial environments, vibration sensors often fail due to moisture ingress, signal degradation over long distances, or the need for external signal conditioners. The Vibro Meter 444-311-000-043 CE311 piezoelectric accelerometer from Meggitt’s vibro-meter product line directly addresses these failure points. It features integrated electronics for charge-to-current conversion, eliminating external conditioners and enabling long-distance signal transmission. The hermetically welded stainless steel construction protects against cooling fluids, lubricants, water, steam, and other contaminants, making the 444-311-000-043 a reliable choice for continuous vibration monitoring.
Technical Specifications Breakdown
The Vibro Meter 444-311-000-043 delivers precise performance with key parameters extracted from factory calibration:
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Sensitivity: 50 µA/g ±5% at 23°C – ensures consistent output for accurate vibration measurement.
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Frequency Response: -3 dB at 2 Hz, ±5% from 6 to 5000 Hz, ±10% from 5000 to 8000 Hz – covers low to high frequency machinery vibrations.
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Dynamic Range: 0.004 to 40 gpeak with overload capacity up to 100 gpeak – handles both normal and transient spikes.
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Temperature Range: -40 to 125°C continuous operation, short-term survival up to 150°C – suitable for extreme industrial environments.
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Hermetic Sealing: Stainless steel sensor (1.4441) and protection tube (1.4541) welded together – prevents corrosion, humidity, and contaminant ingress.
Industry Applications
The 444-311-000-043 is designed for vibration monitoring in harsh industrial and hazardous areas. Typical applications include:
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Rotating machinery protection: Pumps, fans, compressors, and turbines in oil & gas, petrochemical, and power generation plants benefit from its long-term reliability and overload tolerance.
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Hazardous area monitoring: Available Ex-certified versions (not included here) allow use in potentially explosive atmospheres, reducing failure risk from spark or thermal issues.
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Remote or inaccessible locations: The current-modulated output (2-wire system) supports signal transmission over long distances, minimizing signal loss common with charge amplifiers.
Installation & Setup Guidance
Proper mounting ensures accurate readings. The Vibro Meter 444-311-000-043 uses four M6 x 35 Allen bolts with spring-steel washers, tightened to a torque of 15 Nm (11.1 lb-ft). The flying leads connection allows flexible wiring to a control system or galvanic separation unit. For best results:
- Mount on a clean, flat surface to avoid base strain (<0.0015 g/µε typical).
- Ensure the integral cable (twisted pair, shielded) is secured to prevent stress on the hermetically welded junctions.
- Calibration is done at the factory at 120 Hz and 5 gpeak; no field recalibration is needed.
Selection Guide & Purchasing Advice
When ordering the 444-311-000-043, specify the CE311 type with a 20-meter integral cable (standard version). Buyers should verify the sensor’s compatibility with their monitoring system’s input requirements (15–28 VDC supply, bias current 5.5–7.5 mA). For reliable sourcing, PLC Source PRO (available at ubest101.myshopify.com) stocks genuine Vibro Meter parts and can assist with cross-referencing. Ensure the mounting hardware matches your machine’s surface to achieve the specified torque and avoid signal distortion.