21000-28-05-15-028-04-02 Accelerometer and Cable Assembly
Description:
The part number 21000-28-05-15-028-04-02 refers to a specific configuration of an IEPE Accelerometer and integral cable assembly. This device is a piezoelectric sensor designed to measure vibration acceleration on machinery structures, casings, and components.
It is a self-contained unit that combines a sensing element with a built-in microelectronic signal conditioner (IEPE - Integrated Electronics Piezo-Electric). This design allows it to output a low-impedance voltage signal that is robust and can be transmitted over long cables. The integral cable with a specific connector makes it a complete, ready-to-install sensing solution for predictive maintenance and condition monitoring applications.
Parameters & Specifications
The following table details the key parameters for this specific configuration based on common industry part numbering schemes for IEPE sensors.
| Parameter | Specification / Interpretation |
|---|---|
| Part Number | 21000-28-05-15-028-04-02 |
| Device Type | IEPE Accelerometer with Integral Cable |
| Measured Parameter | Vibration Acceleration |
| Sensitivity | -05- = 50 mV/g (a common sensitivity for general purpose vibration monitoring) |
| Frequency Range | -15- = Typically 1.0 Hz to 10,000 Hz (±3 dB). A wide band suitable for most machinery analysis. |
| Electrical Connector | -028- = Specifies the connector type at the end of the integral cable. This often refers to a 2-pin, 4-pin, or TNC connector (e.g., a 2-pin MIL-C-5015 style). |
| Cable Length | -04- = 4 feet (1.2 meters) of integral cable. |
| Mounting | -02 = Likely specifies a threaded stud mounting on the base of the accelerometer (e.g., 10-32 UNF thread). |
| Dynamic Range | -28- = May refer to a specific model or g-range, often ±50 g or ±100 g peak. |
| Power Supply (Constant Current) | Typically 2 to 20 mA constant current excitation (4 mA is standard). |
| Output Bias Voltage | Typically 8 to 12 VDC. |
| Operating Temperature | Typically -50°C to +120°C (-58°F to +248°F) |
| Housing Material | Typically stainless steel. |
| Typical Dimensions | Approx. 25 mm (H) x 16 mm (Diameter) - varies by model. |
| Typical Weight | Approx. 50 grams (1.8 oz) |
Important Note: This part number follows a common but not universal industry format. The interpretations above are highly probable but must be verified with the official datasheet from the manufacturer (e.g., PCB Piezotronics, Metrix, Honeywell). The exact specifications can vary significantly between manufacturers.
Application Scenarios
This type of IEPE accelerometer is a versatile tool for measuring casing and structural vibration. Its integral cable and robust design make it suitable for a wide range of industrial monitoring applications.
Casing Vibration Monitoring on Pumps, Fans, and Motors: The most common application. It is mounted directly on the bearing housing to measure overall vibration levels for predictive maintenance, detecting issues like:
Imbalance
Misalignment
Bearing Defects
Looseness
Portable Data Collection Routes: The integrated cable and connector make it ideal for temporary mounting or for use with handheld data collectors for periodic route-based condition monitoring.
Machine Tool and Spindle Monitoring: Used to monitor vibration on machining centers and spindles to ensure product quality and prevent tooling damage.
Structural Vibration Analysis: Used to measure vibration of structures, frames, and platforms to analyze dynamic response and resonance.
Continuous Online Monitoring Systems: Can be hard-mounted and wired into a permanent online monitoring system (like a Bently Nevada 1701 or other PLC-based system) for real-time protection of critical assets.
Typical Machinery:
Centrifugal & Axial Pumps
Electric Motors
Fans and Blowers
Gearboxes
Compressors
Machine Tools
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