444-311-000-113 Piezoelectric Accelerometer Vibro-Meter

444-311-000-113 Vibro-Meter CE311 Piezoelectric Accelerometer

Product Introduction of CE311 Ex Series

The 444-311-000-113 represents a high-security solution for machinery protection within the Meggitt vibro-meter® product line. Specifically, this CE311 Ex model utilizes a symmetrical shear-mode measuring element to provide accurate data in explosive atmospheres. Because the device incorporates integrated electronics, users do not require an external charge amplifier for signal processing. Furthermore, the internal circuitry performs charge-to-current conversion to ensure the output signal remains stable over long distances.

Meanwhile, this piezoelectric device features a hermetically sealed link between the sensor and its protective stainless-steel hose. Additionally, the rugged construction protects the internal components against lubricants, cooling fluids, and pressurized steam. Specifically, the integral case insulation prevents electrical noise from interfering with critical vibration monitoring tasks. Therefore, technical teams frequently deploy this Ex-certified model for long-term monitoring in chemical plants and offshore platforms.

444-311-000-113 Technical Specifications and Performance

The performance of the 444-311-000-113 is defined by its precise current-modulated output and broad frequency response. First, the sensor provides a nominal sensitivity of 50 µA/g, which translates mechanical motion into a clear electrical signal. Additionally, the frequency response ranges from 2 to 8000 Hz, covering a wide variety of industrial machinery fault signatures. Specifically, the dynamic measurement range covers 0.004 to 40 gpeak, ensuring sensitivity to both low-level and high-level vibrations.

Furthermore, the unit operates on a DC power supply ranging from 15 to 28 VDC with a low standby current. Besides the primary signal processing, the electronics maintain a linearity of within 1% across the entire dynamic range. For instance, the CE311 Ex unit maintains excellent stability with a transverse sensitivity of less than 3%. Finally, the mounted resonant frequency typically reaches 20 kHz, which effectively isolates the sensor from high-frequency structural noise.

Mechanical and Environmental Parameters for CE311 Sensor

Regarding physical durability, this accelerometer utilizes high-grade 1.4441 stainless steel for the sensor body and 1.4541 for the hose. Specifically, the entire assembly is hermetically welded to create a leak-tight system impervious to salt spray and dust. Meanwhile, the 444-311-000-113 maintains reliable operation within a continuous temperature range of −40 to 125°C. In addition, the device can survive short-term temperature spikes up to 150°C for at least fifteen minutes.

Specifically, the CE311 model is built to survive significant mechanical stress, including shock accelerations up to 500 gpeak. Moreover, the base strain sensitivity is kept at a minimum of 0.0015 g/µε to prevent false readings from mounting surface deformation. Therefore, the sensor remains functional and accurate even when installed on heavy machinery experiencing extreme structural loads. Furthermore, the 3-meter integral cable provides a secure connection that meets stringent safety standards for hazardous zone applications.

444-311-000-113 Installation Guide and Usage

Successful deployment of the CE311 Ex requires adherence to specific mounting protocols to ensure high-frequency measurement integrity. First, identify a mounting location that provides a direct path to the machinery's vibration source. Next, secure the 444-311-000-113 using four M6 x 35 Allen bolts and matching spring-steel washers according to DIN standards. Specifically, you must apply a mounting torque of 15 Nm to ensure the sensor is properly coupled to the machine.

Additionally, the sensor uses a 2-wire system for signal transmission, requiring a compatible galvanic separation unit for Ex protection. Furthermore, the flying leads should be terminated in a certified junction box that matches the explosive atmosphere rating of the site. Meanwhile, check that the flexible stainless-steel hose is not under excessive tension or bent beyond its minimum radius. Finally, verify the input voltage is within the 15 to 28 VDC range before activating the monitoring system.

Packaging List

• 1 x 444-311-000-113 Piezoelectric Accelerometer (Ex Version)

• 1 x 3-Meter Integral Shielded Cable

• 1 x Flexible Stainless-Steel Protection Hose (welded)

• 4 x M6 × 35 Allen Bolts (12.9 Steel)

• 4 x M6 Spring-Steel Washers

(Note for WordPress: Set Image Alt Text as "444-311-000-113 Vibro-Meter CE311 Ex certified vibration sensor")

FAQ

1. Is the 444-311-000-113 certified for hazardous areas? Specifically, yes, this model is the Ex version of the CE311, designed and certified for use in potentially explosive atmospheres.

2. Does this sensor require an external charge amplifier? No external amplifier is needed because the sensor features integrated electronics that perform all necessary signal processing internally.

3. What is the current output sensitivity of the 444-311-000-113? Specifically, the device provides a current-modulated output with a sensitivity of 50 µA/g for accurate monitoring.

4. Can the 444-311-000-113 withstand steam or oil? Yes, the sensor and its protection tube are hermetically welded, making the assembly impervious to steam, oil, and 100% humidity.

5. Is it necessary to calibrate the sensor after installation? The unit undergoes dynamic calibration at the factory, so no subsequent calibration is typically required for standard industrial use.