144-901-000-252 | Vibro Meter CA901 Piezoelectric Accelerometer - Petro Auto Tech

Introduction to the 144-901-000-252: Solving Extreme Temperature Vibration Monitoring

In nuclear power plants and high-temperature industrial processes, standard accelerometers fail under continuous exposure to extreme heat or cryogenic conditions. The Vibro Meter 144-901-000-252, part of the CA901 series, is a piezoelectric accelerometer engineered to operate from -196°C to +700°C, making it ideal for loose part monitoring and safety-critical applications. With an ATEX certification for explosive atmospheres (LCIE 08 ATEX 6017 X II 1 G Zones 0, 1, 2), this sensor delivers reliable charge output without external power.

Key Technical Specifications of the 144-901-000-252

The 144-901-000-252 offers a sensitivity of 10 pC/g ±5% at 120 Hz, ensuring precise measurement of vibration from 0.001 g to 200 g peak. Its frequency response spans 3 Hz to 2800 Hz with ±5% accuracy, extending to 3700 Hz with <10% deviation. The mounted resonance frequency exceeds 17 kHz, providing a wide dynamic range. The transducer uses a 2-pole system insulated from the casing, with charge output requiring no external power. Internal insulation resistance is a minimum of 10⁹ Ω, and capacitance is 80 pF pole-to-pole plus 200 pF/m of cable.

Where to Use the 144-901-000-252: Industry Applications

This accelerometer excels in nuclear reactor coolant pump monitoring, meeting NRC guide 1.133 and IEEE 323-1974 standards. It is also deployed in gas turbine blade vibration analysis and high-temperature pipeline loose part detection. The extreme temperature range (-196°C to +700°C) and pressure rating of 140 bar at 23°C (80 bar at 300°C) make it suitable for steam turbine casing and heat exchanger monitoring. Its ATEX certification allows safe use in potentially explosive atmospheres, such as chemical processing plants.

Installation and Mounting Guidance

For optimal performance, mount the 144-901-000-252 inside a tube using four M6 Allen screws with a fastening torque of 15 Nm. Ensure the mounting surface is clean and flat to achieve the specified frequency response. The transducer is hermetically welded in Inconel 600 for corrosion and humidity resistance. Cable length is 8 meters with a Lemo connector (ordering code 144-901-000-252). Avoid exceeding 500 g peak shock acceleration along the sensitive axis during handling.

Maintenance and Reliability in Harsh Environments

The CA901 design requires minimal maintenance due to its robust construction. The integral case insulation and hermetically sealed housing protect against moisture and corrosive gases. Continuous operation from -54°C to +650°C is supported, with extreme excursions to -196°C and +700°C. Radiation resistance includes gamma flux up to 10¹¹ erg/g and neutron flux up to 10¹⁸ n/cm² without effect. Regular inspection of cable integrity and connector tightness is recommended to maintain signal quality.

Compatibility and Integration

The 144-901-000-252 outputs a charge signal requiring an external charge converter for processing. It integrates with any charge amplifier or vibration monitoring system accepting piezoelectric inputs. The 2-pole insulated system ensures compatibility with standard industrial data acquisition modules. No external power is needed at the sensor, simplifying wiring in remote or hazardous locations.

Selection Guide and Purchasing Advice

When ordering, specify the cable length variant: the 144-901-000-252 includes an 8-meter cable with Lemo connector. Verify that your monitoring system supports charge input (10 pC/g sensitivity). For applications requiring longer cables, contact Petro Auto Tech for custom options. As a trusted supplier of industrial automation parts, Petro Auto Tech ensures genuine Vibro Meter products with full traceability.

Frequently Asked Questions

Q: What is the operating temperature range of the 144-901-000-252?

A: The continuous temperature range is -54°C to +650°C, with extreme capability from -196°C to +700°C.

Q: Is the 144-901-000-252 certified for explosive atmospheres?

A: Yes, it holds EC type examination certificate LCIE 08 ATEX 6017 X II 1 G for Zones 0, 1, and 2, with Ex ia IIC T6 to T710 protection.

Q: What is the sensitivity of this accelerometer?

A: Sensitivity is 10 pC/g ±5% at 120 Hz, with a dynamic range of 0.001 g to 200 g peak.

Q: Does the 144-901-000-252 require external power?

A: No, it is a passive charge output sensor with no input power requirements.

Q: What cable length is included with the 144-901-000-252?

A: The standard version includes an 8-meter cable with a Lemo connector.