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A single-point load cell price is useful only when the offer identifies the platform it can support. Rated capacity alone says little about the error when a package is placed near an edge. Ask for the permitted platform dimensions and the conditions of the off-centre load specification before comparing costs.
Single-point load cell price depends on the promised platform performance
A compensated single-point design is intended to tolerate specified load positions on a defined platform. The qualification belongs to that sensor and installation, not to every rectangular beam. Platform stiffness, fixing arrangement and maximum load position remain part of the scale design.
| Offer item | Evidence to request | Why it changes the comparison |
|---|---|---|
| Platform | Permitted dimensions and mounting drawing. | A lower sensor price is irrelevant if the proposed pan exceeds the supported envelope. |
| Off-centre test | Load, test positions and allowable indication change. | A centre-only calibration does not demonstrate edge-load performance. |
| Supply scope | Sensor, connection parts, electronics and agreed tests. | Separate a bare component from a completed and checked weighing assembly. |
Where a METRAVON beam option needs a different assessment
METRAVON MV-LC0050 is documented as a cantilever beam load cell. Its published information does not establish a compensated single-point platform envelope. Do not approve it as a direct single-point substitute without an engineering assessment of the support arrangement and off-centre response.
If the proposed scale uses several supports, compare that complete structure with the single-point proposal. The cell count, load introduction, junction box and position tests will differ. The platform architecture comparison addresses that decision separately.
Make the quotation testable
Provide pan dimensions, dead weight, maximum package weight and the most eccentric placement allowed in service. State the smallest displayed increment and the allowable error separately. Ask who supplies the fixture, who performs the position checks and what results will be delivered.
Do not accept an unspecified calibration charge as proof of all these tests. Identify the points, positions and assembled equipment covered. Keep freight, installation and any required approval work separate from the component subtotal so omissions remain visible.
Q1. Can a smaller platform make an unsuitable sensor acceptable?
It may reduce the applied moment, but it does not establish a missing specification. Obtain a supported mounting proposal and verify the agreed positions. A successful centre test alone cannot answer the question.
Q2. Must every quotation include a complete scale?
No. A component-only purchase is reasonable when the buyer owns the structural design, electronics and acceptance work. The important distinction is responsibility: the quote should not imply that those tasks are included when they are not.
Summary
Send a platform drawing and position-test requirement for a METRAVON weighing proposal. Compare the cost of meeting that requirement, not the price attached to a similar-looking sensor.
