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The 444-680-000-411 is an all-purpose piezoelectric vibration sensor for use with heavy machinery in harsh industrial environments. It utilizes the industry-standard 2-wire voltage transmission technique with a constant current supply, delivering a factory-calibrated sensitivity of 100 mV/g. Thanks to the accelerometer's isolated ground and internal shield, no ground loops or frame voltages are present to disturb the measurement.
Designed for medium temperature industrial applications (-55°C to +120°C)
Shear mode operation, therefore no output due to thermal transients
2-pole low-pass filter for resonance suppression
The CE 680 M411 is an all-purpose vibration sensor designed for use in harsh industrial machinery environments. It uses the industry standard 2-wire voltage transmission technique with a 4 mA constant current supply. The output signal has a sensitivity of 100 mV/g. Thanks to the accelerometer's isolated ground and Faraday shield, no ground loops or frame voltage are present to disturb the measurement.The CE 680 M411 shows extremely low noise levels and exceptional bias voltage stability at elevated temperatures.
The 444-680-000-411 utilizes a fully hermetically welded stainless steel enclosure to exclude ambient moisture, industrial dust, and chemical splashes. The apparatus features a flat frequency response range from 3 Hz to 5000 Hz (±5%), backed by a mounted resonant frequency exceeding 30 kHz to secure precise extraction of mechanical vibration data ranging from low-frequency unbalance to mid-high frequency bearing cracks. Its internal IEPE conversion circuitry restricts the output impedance to under 100 ohms, delivering a low-impedance voltage signal through a top-exit military two-pin threaded connector.
This characteristic permits cable runs over hundreds of meters using industrial twinaxial shielded cabling without suffering severe signal attenuation or electromagnetic noise injection, routing uncorrupted transient vibration data directly into downstream monitoring racks or PLC systems.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Vibro Meter 444-680-000-411 Piezoelectric Accelerometer Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Power Generation Industry
Continuous rolling-element bearing vibration condition analysis for balance-of-plant auxiliary machinery, including boiler feedwater pumps, forced draft fans, induced draft fans, and condensate pumps in thermal power plants.
Water & Wastewater Processing Industry
Fault diagnosis of massive submersible sewage pumps, high-power aerator gearboxes at municipal wastewater treatment facilities, and long-shaft high-pressure water supply pumps at water treatment plants.
Metallurgy & Iron Steel Industry
High-frequency shake attenuation tracking of blast furnace cooling water circulation pump trains, strip steel cold rolling shear drive motors, and dedusting fan bearings in steel mills.
Petrochemical & Coking Industry
Operational defect identification for standard mid-temperature heavy oil pumps, atmospheric and vacuum distillation unit auxiliary centrifugal compressor motors, and coking plant belt-drive roller bearings in oil refineries.
Pulp & Paper Industry
Rolling bearing vibration tracking of pulper drive sections, paper cutting machine main drive rollers, and waste liquor recovery evaporation system vacuum pumps in paper mills.
Automotive Manufacturing & Assembly Industry
Operational state monitoring of screw air compressor packages in plant power stations, coating shop paint-curing line circulation fans, and body stamping line heavy-duty hydraulic pump stations.
During the use of the 444-680-000-411 accelerometer, it is critical to adhere strictly to the installation torque specification of 2.9 Nm using standard 1/4-28 UNF mounting studs. This precision avoids structural damage and ensures a flat frequency response.
Always power the device within the 22 to 30 VDC range using a constant current supply of 2 to 10 mA to prevent severe hardware degradation. Ensure a clean mating interface with the MS3106F-10SL-4S connector to maintain the integrity of its hermetic seal against moisture and dust ingress.
Finally, keep operating environments within the rated -55°C to +120°C thermal envelope to avoid severe bias voltage drift or reduced sensor lifespan.
The 444-680-000-411 with a standardized sensitivity of 100 mV/g (±10%) at a reference frequency of 120 Hz. It accommodates a dynamic range of 80g, ensuring reliable signal extraction during both nominal operations and high-amplitude mechanical shocks. Cross-axis interference is limited by a transverse sensitivity of less than 5%, while full-scale amplitude distortion is minimized via a linearity deviation of under 1%. The mechanical structure exhibits a nominal resonant frequency of 25 kHz, capped at a maximum resonance amplification response of +15 dB.
What is the basic operating principle of 444-680-000-411?
It utilizes the industry-standard 2-wire voltage transmission technique driven by a constant current supply to convert mechanical vibration acceleration into a proportional voltage signal.
What is the maximum dynamic range that 444-680-000-411 can measure?
Its maximum dynamic measurement range is 80g, capable of withstanding high-amplitude mechanical vibrations.
How does 444-680-000-411 resist on-site electrical interference and ground loops?
It features an isolated ground and internal shield, ensuring an isolation resistance of ≥10 MΩ between the inner case and outer housing to eliminate ground loops.
How is 444-680-000-411 mounted on machinery and what torque is required?
It is directly attached to the surfaces of motors or pumps via standard 1/4-28 UNF mounting studs, requiring a precise installation torque of 2.9 Nm.
Does 444-680-000-411 possess any fault protection features?
It includes over-voltage protection up to >40 VDC and built-in reversed polarity protection to prevent hardware damage from wiring errors.
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