CA901 Vibro-Meter 144-901-000-252 Piezoelectric Accelerometer Sensor

Global PLC Spare HUB's Insight

• The CA901 (144-901-000-252) is a specialized piezoelectric sensor for extreme environments.
• While standard sensors fail at 150°C, the CA901 maintains precision up to 700°C.
• It is the industrial "gold standard" for Nuclear Loose Part Monitoring Systems (LPMS).
• The Inconel 600 hermetic housing ensures signal linearity under high radiation flux.
  

Product Introduction

• The Vibro-Meter CA901 is a high-reliability piezoelectric charge-mode accelerometer.
• It generates a charge signal proportional to acceleration without requiring external input power.
• Please download the CA901 installation guide for specific fastening torque requirements.
• This sensor meets NRC 1.133 and IEEE 323-1974 standards for critical safety applications.

Configuration Breakdown

• CA901 Base Model (Piezoelectric Charge Technology)
•   └── 144-901 Series (Standard High-Temp Qualified Design)
•       └── 000 Version (Original Industrial/Nuclear Specification)
•           └── Connector 2 (VM Lemo High-Temperature Type)
•               └── Lead 52 (8-Meter Integrated Armored Cable)
•                   └── Final PN: 144-901-000-252

Technical Specifications

• Brand: Vibro-Meter (Meggitt Energy)
• Model Number: CA901
• Part Number: 144-901-000-252
• Sensitivity: 10 pC/g ±5% calibrated at 120 Hz
• Frequency Range: 3 Hz to 2800 Hz (Nominal response)
• Measurement Range: 0.001 g to 200 g peak dynamic acceleration
• Temperature Tolerance: Cryogenic -196°C up to extreme +700°C
• Resonance Frequency: > 17 kHz nominal (Mounted state)
• Material: Inconel 600 housing, hermetically welded construction
• Radiation Resistance: Withstands Gamma flux 10^11 erg/g and Neutron flux 10^18 n/cm²
• Explosive Certification: ATEX Zone 0, 1, 2 (Ex ia IIC T6 to T710)
• Internal Insulation: Minimum 10^9 Ω resistance at room temperature

Diagnostic Capabilities

• The CA901 utilizes a 2-pole system insulated from the casing to reduce EMI noise.
• Maintenance teams can perform "Insulation Resistance Monitoring" to detect cable degradation.
• Real-time leakage testing between poles and casing identifies moisture ingress in field wiring.
• Differential signal transmission effectively cancels common-mode interference in heavy motor areas.

Typical Application Scenarios

• Nuclear Power Plants: Primary circuit Loose Part Monitoring (LPMS) according to NRC 1.133.
• Gas Turbines: Monitoring vibration in exhaust sections and high-temp turbine casings.
• Cryogenic Engineering: Monitoring liquid nitrogen pumps and rocket fuel handling systems.
• High-Pressure Reactors: Vibration analysis in chemical processes up to 140 bar pressure.

Shipping and Warranty Logistics

• Shipping Carriers: Fast global delivery via FedEx, UPS, and DHL.
• Dispatch Time: In-stock orders are shipped within 24-48 hours.
• Warranty Policy: Includes a comprehensive 12-month technical warranty.
• Packaging: Secured in custom anti-vibration foam to protect sensitive piezoelectric crystals.

Professional FAQ & Purchasing Guide

• Does the 144-901-000-252 require a specific charge amplifier?
• Yes, as a charge-output sensor, it must be paired with a charge converter (e.g., IPC704) for signal conditioning.
• What is the selection logic for the "52" suffix in the CA901 model?
• The "52" indicates a factory-fitted 8-meter cable, which is critical for maintaining calibrated capacitance.
• How critical is the mounting torque for the CA901?
• Extremely critical. You must use a torque wrench to apply exactly 15 Nm to the 4 Allen M6 screws for accurate data.
• Can this sensor be used in direct reactor core monitoring?
• It is qualified for high radiation flux (10^18 n/cm²), making it suitable for secondary containment and primary loop zones.
• How do I diagnose a drop in sensor sensitivity?
• Verify the internal insulation resistance; if it falls below 10^9 Ω, the cable or sensor seal may be compromised.

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