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A 26 GHz radar level meter should be ordered against a defined model specification, not an informal "25 GHz/26 GHz" category name. Nearby frequency labels do not prove that two instruments share an antenna, waveform, measuring range, approval or process connection. Resolve those differences before issuing a purchase order for an existing tank.
Use the 26 GHz radar level meter model as the technical reference
METRAVON MV-RD902 is identified as a 26 GHz liquid radar with a horn antenna and a listed measuring distance of 0.3-30 m. Its page gives 46, 76 and 96 mm horn options. These are configuration choices requiring an installation review, not dimensions that may be substituted without checking the tank opening.
If an older specification says 25 GHz, ask whether that wording identifies a particular installed device or merely a broad technology category. Do not rewrite it to 26 GHz silently. The owner should approve any technical deviation after comparing the exact proposed configuration with the actual requirement.
| Document | Check | Resolve |
|---|---|---|
| Old datasheet | Exact frequency wording and instrument model | Whether the frequency is mandatory or descriptive |
| New offer | Model, antenna and actual operating-frequency data | Any difference from the requested instrument |
| Approval | Applicable documents for the destination and assembly | Whether the supplied version is covered |
| Order | One agreed configuration and drawing revision | Remove contradictory labels before manufacture or shipment |
Frequency does not settle the process fit
Continue the comparison at the antenna, seal and process connection. A matching frequency label cannot establish corrosion resistance or pressure suitability. For MV-RD902, the listed standard and high-temperature options must be confirmed as part of the actual ordered construction; do not combine every catalogue maximum into an assumed universal version.
Likewise, verify the required electronics. An existing 4-20 mA/HART connection is a different integration task from an RS485 network. Record the terminal arrangement and host expectations rather than assuming that instruments in the same frequency band are electrically interchangeable.
Keep approval questions specific
Where radio or hazardous-area documentation is required, request the applicable document and match its model and configuration scope to the offered item. A frequency value on a marketing page is not evidence of approval. The purchaser and responsible site specialists must identify which requirements apply at the destination.
Questions about mixed catalogue labels
Q1. Does this mean a 25 GHz instrument cannot be replaced by a 26 GHz model?
No. It means replacement needs a documented application and installation review. Similar frequency is neither proof of compatibility nor, by itself, a reason to reject a suitable alternative.
Q2. Can the old antenna or flange be reused?
Only when the proposed assembly's manufacturer confirms the arrangement. Antenna geometry, sealing and mechanical details must be assessed together; matching bolt holes alone is insufficient.
Summary
Resolve inconsistent frequency wording before the order becomes a hardware commitment. Send METRAVON the existing datasheet and requested configuration so the MV-RD902 proposal can state explicit matches and deviations without implying unverified interchangeability.
