Meggitt S3960-144-706-000-501 Accelerometer Unit

Module Feature

S3960-144-706-000-501 is Meggitt Sensing Systems S3960 series hermetically sealed piezoelectric accelerometer.

It is dedicated for high temperature vibration measurement on gas turbine casings, engine housings and heavy-duty rotating equipment. It adopts shear-mode piezoelectric sensing element, sealed metal construction for resistance to oil, moisture and corrosive gas. It provides standard IEPE (ICP) vibration signal output, compatible with most turbomachinery monitoring rack front-end. It has high shock and vibration resistance, suitable for continuous operation under strong vibration and thermal cycling environment. It is widely stocked as maintenance spare for power plant and oil & gas machinery protection system.

Working principle

Internal piezoelectric crystal generates charge signal under mechanical vibration acceleration.

Built-in impedance converter circuit converts charge signal into low-impedance IEPE voltage output. The signal is transmitted to monitoring rack for vibration amplitude, spectrum analysis, alarm trigger and machinery protection interlock. Continuous vibration trend data helps identify bearing damage, loose components and rub fault on rotating equipment.

Onboard components

Piezoelectric shear sensing crystal, built-in impedance converter, hermetic sealed stainless steel housing, internal isolation structure, M6 / threaded mounting base, military style miniature electrical connector.

LED indicators

Not applicable. Sensor health status is judged by constant current bias voltage from the monitoring conditioner module.

Hardware self‑diagnosis

Built-in bias voltage supervision from matched signal conditioner. Low or missing bias voltage indicates sensor open, short circuit or cable failure. Fault alarm can be viewed from host monitoring software.

Programming software

System 1, used for vibration channel configuration, alarm threshold setup and spectrum analysis.

Electrical & Process Parameters

Model:S3960-144-706-000-501 Brand:Meggitt Device type:High temperature piezoelectric IEPE accelerometer Function:High-frequency vibration acquisition for gas turbine, engine and rotating machinery condition monitoring

Mechanical & Structure

Mounting:Stud / bolt direct mounting on equipment housing Protection class:Hermetic sealed, IP68 Housing:Stainless steel alloy hermetic housing

Environmental

Operating temperature:-55℃ ~ +180℃ Storage temperature:-55℃ ~ +180℃ Ambient humidity:5~95% non‑condensing

Certification:AS9100 Status:Original Meggitt turbomachinery spare

Installation

Clean mounting surface and tighten stud to specified torque.

Install the sensor with correct orientation, use matched low-noise IEPE cable, verify bias voltage and vibration signal after commissioning.

Interface

Threaded mounting stud, miniature military electrical connector for IEPE signal cable.

Diagnostic

No bias voltage: Cable short circuit or sensor internal breakdown. Low vibration amplitude: Loose mounting, wrong installation direction or sensor element fatigue. Noisy vibration signal: Poor cable shielding, ground loop interference or connector contamination.

Product Brief

Meggitt S3960-144-706-000-501 accelerometer, high temperature piezoelectric vibration spare for gas turbine and engine casing monitoring system replacement.