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A load cell RFQ checklist should help the supplier resolve the decisions that affect fit, measurement and price. Capacity and quantity can produce a quotation, but not necessarily the right sensor. State what the force reading will be used for, attach the mounting information and separate mandatory requirements from items still open for discussion.
Send a concise application brief first
Identify the machine and the measurement point. Describe whether the cell measures a held load, a repeated press force or a changing tension, and state what the result controls or accepts. Include force direction, expected operating range and any preload from the fixture.
List maximum credible loading separately from the normal measurement range. A jam, handling impact or off-axis force can govern the mechanical design even when it is not a useful measurement. Do not replace those load cases with an unexplained percentage margin.
Load cell RFQ checklist: information that changes the quotation
| Field | What to provide | What the answer determines |
|---|---|---|
| Measurement | Direction, working range, preload, peaks and required result | Sensor form, rated capacity and whether the proposed measurement is feasible. |
| Mounting | Drawing revision, interfaces, available envelope and force axis | Mechanical fit, adapters and responsibility for fixture design. |
| Electrical | Existing electronics, excitation, input range, cable and connector | Whether the supply is a bare sensor or needs additional conditioning. |
| Performance | Smallest relevant change, allowable error, timing and test conditions | Required calibration and evidence, rather than an arbitrary accuracy label. |
| Environment | Temperature, fluids, washdown, movement and any classified location | Material, sealing, cable and documentation requirements. |
| Commercial scope | Quantity, destination, requested date, spares and included services | A comparable price and a delivery commitment the supplier can confirm. |
Where an input is unknown, identify it as unresolved and assign responsibility for providing it. A blank field invites an assumption; an explicit open item allows a conditional proposal without concealing the gap.
Make the model request specific without preselecting an unsafe capacity
METRAVON MV-LC0190 is offered in 1, 5, 20 and 50 kg rated versions. The 1 kg version has a nominal sensitivity of 0.5 mV/V, while the larger versions have 1.0 mV/V nominal sensitivity. This is why even an enquiry for a known model needs the capacity and receiving electronics.
A useful request can name MV-LC0190 as a candidate while asking for confirmation against the attached load cases and fixture. Do not call a candidate an approved selection before the mechanical and electrical checks are complete. If the equipment reports newtons while the catalogue uses a kilogram capacity designation, state the required engineering units and calibration basis.
For example, an enquiry might specify an axial tension/compression fixture, provide minimum and maximum working forces and preload in a load-case sheet, and ask whether the candidate capacity is suitable. It should also identify the amplifier and required cable termination. This produces a reviewable proposal without inventing site data or demanding a nominally equivalent part.
Attach drawings that answer fit questions
Show the force axis, fixed and loaded interfaces, hole or thread details, adjacent clearances and cable exit. Include any adapters in the drawing so responsibility for their design is clear. Photographs help explain the equipment, but they cannot reliably supply dimensions or thread identification.
For replacement work, include the original drawing and part identification where available. Describe why replacement is needed and whether the old readings were stable. A failure caused by a seized guide or repeated overload may recur with a new cell. The load-cell fault investigation helps separate a failed cell from an installation problem.
Ask for the evidence that matches the required result
Define whether acceptance applies to the bare cell, the supplied sensor-and-electronics set or the complete installed machine. These scopes require different tests. A factory calibration result does not include every force introduced by the customer's fixture.
Request the calibration direction and range needed by the application. For a force trace, include the event duration and timing requirement rather than asking only for a static accuracy figure. The amplifier selection guide explains why input range, noise and response must be checked together.
Specify required certificates by type and application, then ask for the exact supporting documents. Do not treat a logo, general quality certificate or a different model's approval as evidence for the ordered sensor. If a requirement cannot be supported, the quotation should identify the exception instead of implying compliance.
Compare quotations by scope and exceptions
Separate sensor, cable, connector, mounting parts, conditioner, calibration and commissioning charges. Ask whether accessories shown in a photograph are included. Confirm the exact model code and drawing revision before treating two prices as equivalent.
Request a clear response to each mandatory requirement: met, not met or awaiting information. Review exceptions for their effect on fit, acceptance and downtime. A lower price with an omitted adapter or an unresolved interface is not the same offer.
Delivery dates, quantities and spare requirements belong in the enquiry, but remain subject to confirmation. Keep the accepted technical documents and commercial scope together so a later substitution cannot silently change the design.
Enquiry questions
Q1. Must every possible specification be included?
No. Include the requirements that affect the intended measurement and installation. Unnecessary demands can add cost and obscure the important ones. Explain the application so the supplier can identify missing critical information.
Q2. Can the supplier choose the capacity?
The supplier can assess a capacity from complete load information, but cannot reconstruct unknown preload, impacts or side loads from a product name. Provide the load cases and identify who approves the final equipment design.
Q3. How should a proposed equivalent be assessed?
Compare the actual drawings, electrical characteristics, environment limits and required evidence. Obtain approval for deviations before installation, then perform the agreed system verification. Similar appearance and capacity are insufficient.
Summary
Send a short application brief, a controlled drawing and the requirements that determine acceptance. Use the METRAVON quotation request to distinguish a candidate model from an approved configuration, and require omissions or exceptions to be stated before the order is placed.
