330500-04-00 Seismic Transmitter
Description:
The part number 330500-04-00 refers to a Seismic Vibration Transmitter from the Bently Nevada 330500 series. This device is a robust, 4-20 mA loop-powered transmitter designed for continuous monitoring of casing or structural vibration (velocity) on a wide range of industrial rotating machinery.
It is an integrated, two-wire device that combines a velocity sensor (seismometer) and a signal conditioner into a single, ruggedized package. The transmitter measures the absolute vibration velocity of the surface on which it is mounted and converts this mechanical motion directly into a standardized 4-20 mA analog signal. This signal is proportional to the vibration level and can be easily sent to a PLC, DCS, or a basic indicator for machinery protection and continuous monitoring.
Parameters & Specifications
The following table details the key parameters for this specific configuration based on the Bently Nevada 330500 series specifications.
| Parameter | Specification / Interpretation |
|---|---|
| Part Number | 330500-04-00 |
| Device Type | 4-20 mA Vibration Transmitter (Velocity) |
| Measured Parameter | Vibration Velocity |
| Sensitivity / Range | -04- = 0 to 4 in/s True Peak (0 to 100 mm/s True Peak). This is a very high range for severe vibration applications. |
| Frequency Range | 4.5 Hz to 1000 Hz (± 3 dB) |
| Output Signal | Two-wire, 4-20 mA analog output, linearly proportional to vibration velocity. |
| Power Supply | 12 to 30 VDC loop power (standard for two-wire 4-20 mA devices). |
| Electrical Connection | -00 = Typically a 1/2" NPT conduit entry. |
| Mounting | Single 1/4"-28 UNF threaded stud on the base. |
| Scale Factor | (20 mA - 4 mA) / Range = 16 mA / 100 mm/s = 0.16 mA/(mm/s) |
| Operating Temperature | -40°C to +85°C (-40°F to +185°F) |
| Housing Material | Stainless steel |
| Typical Dimensions | Approx. 80 mm (H) x 65 mm (Diameter) (3.15 in x 2.56 in) |
| Typical Weight | Approx. 0.9 kg (2.0 lbs) |
Important Note: *For absolute certainty regarding specifications and installation, consulting the official Baker Hughes Bently Nevada 330500 Series Datasheet for this exact part number is essential. The high 100 mm/s range is a key characteristic of this model.*
Application Scenarios
This 330500 series vibration transmitter is designed for continuous, reliable monitoring of overall vibration on industrial equipment where high vibration levels are expected or critical to monitor. Its simple 4-20 mA output makes it ideal for integration into basic control and monitoring systems.
Casing Vibration Monitoring on Rough Machinery: The high 100 mm/s (4 in/s) range makes it suitable for monitoring very rough or high-vibration machinery, such as:
Large Fans and Blowers (e.g., Induced Draft Fans)
Crushers, Mills, and Screens in mining and mineral processing
Large Pumps handling slurries or abrasive fluids
Reciprocating Compressors
Machine Protection in Severe Duty Applications: Used as a cost-effective protection solution for assets where vibration levels can be extremely high, and a standard-range transmitter might constantly saturate or be damaged.
Continuous Monitoring of Auxiliary Equipment in Harsh Environments: Ideal for motors, gearboxes, and other equipment in heavy industries (e.g., mining, pulp & paper, steel, cement) where robustness and a wide measurement range are critical for preventing catastrophic failures.
Plant-Wide Vibration Monitoring on Low to Medium Criticality Assets: Its rugged design and simple installation make it suitable for deploying across a facility to monitor hundreds of assets that operate at higher vibration levels, providing a basic level of protection and enabling condition-based maintenance.
API 670 Compliance Support: For machinery where the API 670 standard mandates casing vibration monitoring, these transmitters provide a compliant solution, with this particular model being selected for its extended range on rough machinery.
Typical Machinery:
Ball & SAG Mills
Induced Draft (ID) & Forced Draft (FD) Fans
Large Centrifugal Pumps in harsh services
Reciprocating Compressors
Conveyor Drive Motors and Gearboxes in heavy industry
Crushers and Screens
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