Introduction
The model 330101-00-20-10-11-05 is a 4-20 mA DC Velocity Seismic Transmitter from the Bently Nevada 3300 series. This device is a robust, integrally packaged sensor designed to measure the casing or absolute vibration (expressed as velocity) of rotating machinery. It combines a piezoelectric accelerometer with internal signal conditioning electronics to produce a standardized 4-20 mA output that is directly proportional to vibration severity. This two-wire loop-powered design is ideal for direct integration into control systems, PLCs, and DCS for continuous machinery protection and monitoring. The specific suffix -05 indicates a particular mechanical and electrical configuration, often related to the connector type and cable orientation.
Parameters / Specifications
The following table outlines the key technical parameters for the 330101-00-20-10-11-05 transducer.
| Parameter | Specification |
|---|---|
| Model Number | 330101-00-20-10-11-05 |
| Description | 4-20 mA DC Velocity Seismic Transmitter |
| Physical Dimensions | Approx. 78.7 mm (3.10 in) in height (excluding connector) x 35.1 mm (1.38 in) diameter. [Based on standard housing for this configuration] |
| Weight | Approx. 0.34 kg (0.75 lb) |
| Measurement | Casing Vibration (Velocity) |
| Output Signal | 4-20 mA, 2-Wire, Loop Powered |
| Dynamic Range | 0 to 25.4 mm/s True Peak (0 to 1.0 in/s True Peak) |
| Frequency Response | 4.5 Hz to 1000 Hz (270 CPM to 60,000 CPM) |
| Power Supply | 12 to 30 VDC |
| Sensitivity | 0.63 mA/mm/s (16 mA/in/s) |
| Operating Temperature | -40°C to +85°C (-40°F to +185°F) |
| Housing Material | Stainless Steel |
| Electrical Connection | Integral, two-pin, military-style connector (e.g., MS3106A-20-9S or equivalent). The -05 suffix typically specifies a connector style and top exit configuration. |
| Compliance | CE Marked |
Note: The dimensions and weight are typical values for this model series. The specific suffix -11-05 defines the connector and cabling details. For mission-critical applications, always verify against the official manufacturer's drawing or datasheet.
Application Scenarios
This transmitter is used for reliable, continuous vibration monitoring across a wide range of industrial applications:
General Purpose Machinery Protection:
Mounted on the bearing housings of pumps, fans, blowers, and compressors to provide a continuous 4-20 mA signal for alarm and shutdown functions in a machinery protection system.
Integration with Control Systems:
Its standard 4-20 mA output makes it perfectly suited for direct connection to a plant's Distributed Control System (DCS) or Programmable Logic Controller (PLC), enabling centralized monitoring of hundreds of machines from the control room.
Motor Condition Monitoring:
Widely used on electric motors of all sizes to monitor overall vibration levels, helping to detect common faults like imbalance, misalignment, rolling element bearing defects, and mechanical looseness.
HVAC and Auxiliary Plant Equipment:
Ideal for monitoring fans, chilled water pumps, and cooling tower fans in Heating, Ventilation, and Air Conditioning (HVAC) systems to ensure efficient operation and schedule maintenance.
Rugged Industrial Environments:
The stainless steel housing and robust construction make it suitable for use in demanding environments, including oil & gas, chemical plants, power generation, and water treatment facilities, where reliable operation is critical.
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