Product Overview
When your turbine, compressor, or reactor runs at temperatures that destroy ordinary sensors, you need a measurement chain that stays reliable. The Vibro Meter 144-901-000-222 piezoelectric accelerometer is built for exactly that environment. As part of the CA 901 series, this sensor delivers charge output for loose part monitoring and vibration analysis in the most demanding oil, gas, and industrial automation applications.
This accelerometer operates without input power, using a two-pole system insulated from the casing. The charge output feeds a remote charge converter, which keeps the sensor itself passive and robust. With a sensitivity of 10 pC/g at 120 Hz and a dynamic measuring range from 0.001 g to 200 g peak, it captures both subtle vibration and severe spikes. The 144-901-000-222 handles overloads up to 500 g peak and maintains ±1% linearity across its range.
Technical Specifications
| Parameter | Value |
|---|---|
| Sensitivity (at 120 Hz) | 10 pC/g ±5% |
| Dynamic measuring range | 0.001 g to 200 g peak |
| Overload capacity | Up to 500 g peak |
| Frequency response | 3 to 2800 Hz nominal ±5% |
| Resonance frequency (mounted) | > 17 kHz nominal |
| Temperature range (continuous) | -54°C to +650°C |
| Temperature range (extreme) | -196°C to +700°C |
| Pressure | 140 bar at 23°C, 80 bar at 300°C |
| Mounting | 4 Allen screws M6, torque 15 Nm |
| Certifications | LCIE 08 ATEX 6017 X II 1 G (Zones 0, 1, 2) |
These specifications translate into practical advantages. The extreme temperature range means you can mount the sensor directly on hot surfaces without cooling accessories. The high resonance frequency of 17 kHz keeps the measurement clean well beyond the frequency range of interest. Hermetically welded Inconel 600 construction resists corrosion and humidity, while integral case insulation prevents ground loops.
Applications and Integration
In nuclear and fossil power plants, the 144-901-000-222 excels at loose part monitoring. Its radiation tolerance—no effect from gamma flux up to 1011 erg/g or neutron flux up to 1018 n/cm²—ensures long-term reliability inside containment. For oil and gas facilities, the ATEX certification for Zones 0, 1, and 2 allows direct installation in explosive atmospheres without additional barriers. The 12.5 m cable length (XX=22) provides flexible routing to junction boxes or charge converters.
Integration is straightforward. The sensor uses a two-pole system insulated from the casing, so you connect it to a charge converter or vibration monitor that accepts charge output. No external power is required at the sensor. When mounting, use the four M6 Allen screws and tighten to 15 Nm. For hazardous areas, verify that the associated equipment meets the Ex ia IIC T6 to T710 rating. If you need help selecting the right charge converter or cable, the team at Oil AutoTech offers hands-on technical selection support.
Maintenance and Reliability
From a maintenance engineer’s perspective, this accelerometer is designed for minimal intervention. The hermetically welded Inconel 600 housing resists corrosion and humidity, so you can expect stable performance over long intervals. Periodic inspection should focus on the mounting torque and cable condition. Because the sensor has no moving parts and no internal electronics, wear is virtually eliminated. The high overload capacity of 500 g peak protects against accidental spikes during startup or process upsets.
For explosive atmospheres, always follow the manufacturer’s safety manual and local regulations. Do not attempt to repair or modify the sensor. If you suspect a fault, replace it with a certified equivalent. Keep spare units on hand to avoid downtime—Oil AutoTech provides fast dispatch, worldwide, so you can get spares when you need them.
Selection Guide
Before ordering the 144-901-000-222, confirm the cable length you need. The ordering number 144-901-000-2 XX uses XX=22 for a 12.5 m cable with a Lemo connector. Check that your charge converter or monitoring system accepts a 10 pC/g charge output and provides the necessary signal processing. Verify the ATEX rating matches your zone classification. If you are unsure, contact Oil AutoTech today for pricing and availability. Their team can help you select compatible cables, connectors, and charge amplifiers.
Frequently Asked Questions
What makes the 144-901-000-222 suitable for extreme temperatures?
It operates continuously from -54°C to +650°C and handles extreme excursions from -196°C to +700°C, thanks to its Inconel 600 construction and charge output design.
Can this accelerometer be used in explosive atmospheres?
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.
Does the sensor require external power?
No. Input power requirements are none. It generates a charge output that a remote charge converter processes.
What is the mounting procedure?
Mount inside a tube using four M6 Allen screws and tighten to 15 Nm. Ensure the mounting surface is clean and flat.
How do I order the correct cable length?
The ordering number includes XX=22 for a 12.5 m cable with a Lemo connector. Contact Oil AutoTech for other lengths or connector options.
