Bently Nevada 74712-06-03-04-00 High-Temperature Seismoprobe
A side-connector velocity transducer calibrated for near-horizontal mounting with a rectangular flange base.
Key Information
74712-06-03-04-00 is a high-temperature two-wire Seismoprobe velocity transducer. The code identifies the 06 orientation and minimum-frequency option, a rectangular flange base, a side-mounted connector and no agency-approval option.
The moving-coil sensor produces an output proportional to machine-casing vibration velocity. Correct orientation and rigid mounting are essential because the internal seismic element is gravity sensitive.
Functions
- Measures absolute casing or bearing-housing vibration as velocity.
- Operates as a self-generating two-wire moving-coil transducer.
- Supports high-temperature machinery locations when the approved mounting and wiring arrangement is maintained.
Specifications
| Manufacturer | Bently Nevada, a Baker Hughes business |
|---|---|
| Part Number | 74712-06-03-04-00 |
| Transducer Family | 74712 high-temperature Seismoprobe |
| Orientation / Minimum Frequency | 06 — 0° ±10° / 10 Hz (600 cpm) |
| Mounting Base | 03 — rectangular flange |
| Connector | 04 — side mount |
| Agency Approval | 00 — no approvals |
| Sensitivity / Temperature | 20 mV/mm/s / -29°C to +204°C |
Installation
- Mount the rectangular flange on a clean, rigid, prepared machine surface in the calibrated orientation.
- Allow clearance for the side connector and protect the signal cable in conduit or an approved enclosure arrangement.
- Terminate the two-wire output with the specified monitor load and preserve conductor polarity.
- Verify a known vibration response and monitor scaling before enabling protective functions.
Lifecycle
- Record the mounting angle, connector direction and approved baseline for each installed sensor.
- Inspect the flange, fasteners, connector and cable shielding during shutdown maintenance.
- Do not replace this high-temperature execution with a 9200 sensor without a full temperature and mechanical review.
FAQ
Can 74712-06-03-04-00 be mounted vertically?
No automatic change of orientation should be accepted. The 06 execution is calibrated for its defined near-horizontal range and must be installed accordingly.
What distinguishes 74712-06-03-04-00 from a 9200 Seismoprobe?
The 74712 family is the high-temperature execution; replacement still requires the same mounting, connector, frequency and approval options to be checked.
Does 74712-06-03-04-00 include a signal cable?
The code specifies a side-mounted connector, not an integral cable, so the required mating cable must be included separately in the installation scope.
What mounting evidence is useful for 74712-06-03-04-00?
Provide photographs of the rectangular flange, connector clearance, installation angle, cable route and the connected monitor channel.
What is the main commissioning risk for 74712-06-03-04-00?
Incorrect orientation or a non-rigid flange surface can reduce response or create false vibration, so mounting and channel response must be validated together.
