Vibro-Meter CE281 444-281-000-111 Industrial Piezoelectric Accelerometer

Frequently asked questions
Q:What is the Vibro-Meter CE281 444-281-000-111?
A:The CE281 444-281-000-111 is a piezoelectric accelerometer with integrally attached electronics designed for vibration monitoring and machinery protection in harsh industrial environments and hazardous areas. It provides a 2-wire current output of 10 µA/g for long-distance signal transmission.

Q:What type of output does the CE281 444-281-000-111 provide?
A:The sensor uses integrated electronics to perform charge-to-current conversion, delivering a 10 µA/g current-modulated output that supports reliable transmission over long cable distances.

Q:Does the CE281 444-281-000-111 require an external charge amplifier?
A:No. The sensor incorporates integrally attached electronics, eliminating the need for an external charge amplifier while providing the required signal conditioning internally.

Description

The Vibro-Meter CE281 444-281-000-111 is a piezoelectric accelerometer designed for long-term vibration monitoring in harsh industrial environments and hazardous areas. The sensor incorporates integrally attached electronics that perform charge-to-current conversion, providing a current-modulated 2-wire output with a nominal sensitivity of 10 µA/g. The sensor head and electronics feature integral case insulation, helping reduce the effects of electrical interference during vibration measurement. The accelerometer offers a dynamic measurement range of 0.0001 to 200 g peak, a typical resonant frequency of 25 kHz, and a frequency response of 3 Hz to 7000 Hz (±5%). It operates from a 15 to 28 VDC power supply with a 5 to 8 mA bias current and is intended for use with a galvanic separation unit or compatible machinery monitoring system. Designed for demanding industrial applications, the sensor head supports continuous operation from −55°C to +260°C, while the attached electronics operate continuously from −40°C to +125°C. The CE281 is available in both standard and Ex-certified versions for installation in non-hazardous and hazardous environments, making it suitable for reliable, continuous vibration monitoring of industrial machinery.

Parameter

Model: CE281 444-281-000-111 Industrial Piezoelectric Accelerometer
Frequency response: 3 to 7000 Hz
Sensitivity: 10 µA/g
Temperature range: −55 to 260°C (sensor) and −40 to 125°C (electronics) 
Input power supply requirements: 15 to 28 VDC, with a bias (standby) current of 5 to 8 mA
Signal transmission: Current-modulated output (2-wire system)

Application areas

The Vibro-Meter CE281 444-281-000-111 is engineered for long-term absolute casing vibration monitoring and machinery protection in extreme industrial settings, notably where very high temperatures and explosive atmospheres coexist.

• Petrochemical Oil & Gas Platforms: Specifically tailored for compressor rooms, offshore drilling rigs, and processing plants containing hazardous methane or hydrogen environments.
• Power Generation Plants: Deployed along turbine decks where components continuously endure severe heat.
• Severe Chemical Processing: Deployed where equipment is continuously exposed to corrosive elements like coolants, steam, lubricants, and oil.

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