Product Overview: The 444-311-000-013 CE311 Accelerometer
When monitoring vibration in harsh industrial environments or hazardous areas, the Vibro Meter 444-311-000-013 CE311 piezoelectric accelerometer provides a robust, reliable solution. This sensor from Meggitt’s vibro-meter product line integrates a symmetrical shear-mode measuring element with integrated electronics, eliminating the need for an external charge amplifier. The 444-311-000-013 offers a current-modulated output suitable for long-distance signal transmission, making it ideal for machinery protection in remote or challenging locations.
Technical Specifications
The Vibro Meter 444-311-000-013 CE311 is engineered for precision and durability. Key parameters from the product documentation include:
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Sensitivity: 50 µA/g ±5% at 23°C
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Frequency Response: −3 dB at 2 Hz; <±5% from 6 to 5000 Hz; <±10% from 5000 to 8000 Hz
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Temperature Range: −40 to 125°C continuous operation; short-term survival to 150°C
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Input Power: 15 to 28 VDC with bias current 5.5–7.5 mA
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Dynamic Measurement Range: 0.004 to 40 gpeak
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Shock Acceleration: 500 gpeak (half-sine, 1 ms)
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Hermetically Sealed: Stainless steel sensor and protection tube, welded to prevent ingress of fluids or contaminants
These specifications ensure reliable performance in demanding conditions, reducing unplanned downtime and maintenance costs.
Applications and Use Cases
The Vibro Meter 444-311-000-013 CE311 is designed for vibration monitoring in harsh industrial settings and hazardous areas. Typical applications include:
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Pump and compressor monitoring: Detect early signs of bearing wear or imbalance at high temperatures.
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Steam and gas turbine protection: Continuous vibration measurement in environments with steam, oil, and cooling fluids.
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Process plant machinery: Reliable long-term monitoring where sensor replacement is costly and access is limited.
By choosing the 444-311-000-013, you invest in a sensor that withstands corrosive atmospheres, high humidity, and thermal extremes, contributing to higher uptime and lower total cost of ownership.
Installation and Mounting Guidance
Mounting the Vibro Meter 444-311-000-013 CE311 requires four M6×35 Allen bolts (12.9 steel per DIN 912) with M6 spring-steel washers (DIN 7980). A mounting torque of 15 Nm (11.1 lb‑ft) ensures proper coupling. The sensor is fitted with a hermetically sealed integral cable (twisted pair, shielded) protected by a flexible stainless steel hose. Flying leads provide the electrical connection. No external charge amplifier is needed; the integrated electronics output a current-modulated 2‑wire signal suitable for direct connection to a monitoring system or galvanic separation unit.
Maintenance and Reliability
The hermetically welded construction of the Vibro Meter 444-311-000-013 makes it impervious to water, steam, oil, sea‑salt atmospheres, dust, and fungus. This eliminates the need for frequent recalibration or replacement. Factory dynamic calibration at 120 Hz and 5 gpeak (23°C) requires no subsequent calibration. To maximize service life, inspect the cable and protection tube periodically for physical damage; replace the assembly if the hermetic seal is compromised. The sensor’s robust design directly supports a cost‑benefit advantage by extending maintenance intervals and reducing spare‑part inventory.
Selection Guide and Purchasing Advice
When ordering the Vibro Meter 444-311-000-013, specify the CE311 type with standard 3‑m integral cable. Verify your system’s input requirements: 15–28 VDC supply and a current‑modulated input (e.g., from a monitoring system or galvanic isolation unit). The sensor’s case insulation and long‑distance signal transmission (up to several hundred meters) simplify integration. For reliable supply and genuine parts, contact PLC Source PRO (ubest101) — your trusted source for industrial automation modules and vibration monitoring spares.