Overview
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 18745-02 |
| Brand | Bently Nevada |
| Product Type | Proximitor Sensor |
| Transducer System | 7200 Series |
| Frequency Response | 0 Hz (DC) to 10 kHz |
| Scale Factor | 200 mV/mil (7.87 V/mm, as supplied) |
| Power Supply | -18 VDC to -24 VDC |
| Origin | USA |
| Weight | 0.23 kg |
| Dimensions | 102 mm x 114 mm x 132 mm |
| Operating Temperature | -51 deg C to +100 deg C |
Measurement Function
The Proximitor sensor converts probe-to-target distance changes into an electrical voltage signal. Static shaft position produces a DC component, while dynamic displacement produces a changing voltage signal that can support vibration monitoring when connected to a compatible monitoring system.
The stated scale factor of 200 mV/mil corresponds to approximately 7.87 V/mm, or 7.87 mV/um. This relationship helps maintenance personnel interpret voltage changes as displacement, provided the complete transducer system operates within its specified linear range.
Power Supply and System Requirements
The supplied power range is -18 VDC to -24 VDC. Verify the required supply polarity, probe and extension cable configuration, and monitor input requirements before installing a replacement. The sensor operates as part of a transducer system, so matching the sensor alone does not confirm that the complete measurement chain is compatible.
Frequently Asked Questions
Q: What measurements can the 18745-02 support?
A: It supports non-contact measurement of static position and dynamic displacement. With a compatible monitoring system, the resulting signal can also support machinery vibration monitoring.
Q: What does the 200 mV/mil scale factor mean?
A: It represents the nominal change in output voltage per mil of target displacement. Use this relationship only within the applicable linear measurement range and with the correct probe, cable, and target configuration.
Q: What should be checked before ordering a replacement?
A: Confirm the complete part number, existing 7200 Series transducer configuration, supply requirements, probe and cable arrangement, and mounting dimensions. Verify these details against the installed equipment before substituting another part number.
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