Vibro-Meter 444-680-000-411 Piezoelectric Accelerometer

Description

The Vibro-Meter 444-680-000-411 is a piezoelectric accelerometer with integrated electronics designed for continuous absolute vibration measurement on rotating machinery. The sensor incorporates an internal charge amplifier and provides a standard 100 mV/g IEPE voltage output, allowing direct connection to compatible vibration monitoring systems. It features a shear-mode piezoelectric sensing element, an electrically isolated sensing base, and an internal Faraday shield to minimize the effects of electromagnetic interference and ground loops. The accelerometer is housed in a hermetically sealed 316L stainless steel enclosure for reliable operation in demanding industrial environments. It offers a frequency response of 3 Hz to 5 kHz (±10%), an extended response from 0.5 Hz to 10 kHz (±3 dB), a dynamic measuring range of 80 g, and operates over a temperature range of −55°C to +120°C, making it suitable for long-term machinery condition monitoring and protection applications.

Parameter

Model: 444-680-000-411 Piezoelectric Accelerometer
Temperature range: -55°C to +120°C
Sensitivity (at 120 Hz) : 100 mV/g ±10%
Dynamic range: 80 g
Transverse sensitivity: < 5%
Linearity: < 1% up to full-scale
Resonant frequency : Nominal 25 kHz, +15 dB max. at resonance
Simusoidal vibration limit: 500 g peak
Base strain sensitivity : 0.002 µg peak/µε

Frequently asked questions

Q:What is the Vibro-Meter 444-680-000-411?
A:The Vibro-Meter 444-680-000-411 (CE 680 M411) is a piezoelectric accelerometer with integrated electronics designed for vibration measurement in harsh industrial machinery environments. It provides a standard 100 mV/g IEPE voltage output using a 2-wire constant-current supply.

Q:What type of output does the 444-680-000-411 provide?
A:The sensor delivers a 100 mV/g voltage output and operates with the industry-standard 2-wire IEPE transmission technique using a constant-current power supply.

Q:What is the operating temperature range of the 444-680-000-411?
A:The accelerometer is designed for medium-temperature industrial applications and operates over a temperature range of −55°C to +120°C.

Application areas

The Vibro-Meter 444-680-000-411 is specifically engineered to perform continuous condition monitoring and machinery protection in demanding, heavy-duty industrial environments.

• Power Generation Plants: Integrated into vibration monitoring suites for auxiliary machinery, hydro-turbines, and steam-generation control equipment.
• Petrochemical Oil & Gas: Installed in hazardous, harsh environments to track the mechanical health of midstream and downstream high-pressure transport compressors.
• Heavy Manufacturing & Processing: Used across steel mills, pulp/paper factories, and chemical processing facilities where assets run continuously under severe stress.

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