A&D FX-300i vs FX-300iN: Non-NTEP vs Legal-for-Trade Buyer Guide
- pete8781
- Jul 31
- 3 min read
Need more details or help choosing the correct item? Call MNM Scales at (832) 290-3120 or email mnmscales@yahoo.com.
The A&D FX-300i vs FX-300iN decision is primarily about regulatory configuration: the FX-300i is the non-N precision balance, while MNM identifies the N-suffix FX-300iN as the NTEP/legal-for-trade version for applications where weight is used commercially.
What both models are trying to accomplish
Both names belong to A&D’s compact FX-i precision-balance platform. The non-N FX-300i official specification is 320 g capacity with 0.001 g readability, fast stabilization, standard RS-232C, external calibration and functions such as counting, percentage, comparator and statistics. The N-suffix model is sold for legal-for-trade use according to MNM’s model-designation guidance. Because legal models can have regulatory restrictions or approved settings that differ from non-trade versions, purchase by exact model suffix rather than assuming the names are interchangeable.
Choose FX-300i for internal process and laboratory work
The non-N FX-300i is a logical choice for research, formulation, quality control, parts comparison, production sampling and educational work when the balance is not being used to determine a commercial price by weight. In these situations, buyers often care more about resolution, response, connectivity and workflow functions than about weights-and-measures certification. Avoid paying for a regulatory configuration that the process does not require, but document why the chosen equipment is technically adequate for the job.
Choose FX-300iN when legal-for-trade approval is required
If the weighing result determines the price charged to a customer or is used in another regulated commercial transaction, a legal-for-trade configuration may be required. MNM states that the “N” at the end of these model numbers identifies the NTEP version. Examples can include certain jewelry, precious-metal, retail or fee-based applications. Regulatory requirements vary by jurisdiction and use, so confirm the exact approved model, class, division and installation requirements with the responsible weights-and-measures authority before deploying it commercially.
Calibration and service differences matter
The non-N FX-300i uses external calibration and can be adjusted according to A&D’s normal FX-i procedure. A legal-for-trade model may have protected configuration, sealing or service requirements. Do not assume that a calibration procedure appropriate for a non-trade balance should be used freely on an approved trade device. When an NTEP model is in commercial service, follow local sealing and service rules and use qualified service when required.
Resolution alone does not determine legal status
Two balances can look almost identical and display similar small increments while having different legal status. NTEP approval considers the evaluated configuration and applicable performance requirements, not simply how many decimal places appear on the screen. That is why the suffix is important. A high-resolution non-trade balance should never be advertised as legal for trade merely because its readings appear precise.
Connectivity and workflow
Both purchasing decisions should also consider data requirements. The FX-i platform includes standard RS-232C and can support optional USB, Ethernet or Bluetooth paths depending on configuration. Internal laboratory users may prioritize easy PC data capture. Commercial users may need approved printed tickets or software integration. Confirm the accessory and interface configuration as part of the order because some FX-i interface options cannot be installed at the same time.
Why the product image needs a note
MNM’s non-N FX-300i product page displays an image whose source filename is “fx-300in.jpg.” That makes it useful as representative FX-i family/variant artwork but not appropriate to label as guaranteed exact photography of the non-N unit. The housing similarity is precisely why buyers should verify the model label and suffix instead of identifying regulatory status from appearance.
Buyer checklist
Before ordering, answer five questions: Is the weighing result used to set a commercial price? Does your jurisdiction require an approved legal-for-trade device for that use? Do you need 320 g capacity and 0.001 g readability? Do you need external calibration or would an internally calibrated FZ-i be preferable? Which data interface must be installed? Those answers determine whether FX-300i, FX-300iN or another A&D model is the correct choice.
FAQ
What does the N suffix mean?
MNM identifies the N-suffix version as the NTEP/legal-for-trade model.
Is FX-300i automatically legal for trade because it reads to 0.001 g?
No. Display resolution and legal approval are separate issues. The exact approved model/configuration matters.
Which one is better for an R&D lab?
If legal-for-trade certification is unnecessary, the non-N FX-300i is generally the more directly relevant configuration.
Which one should a jewelry seller choose?
If customer transactions are determined by weight, verify local requirements and select the approved legal-for-trade configuration when required. Do not rely on appearance or decimal places alone.
Can I convert an FX-300i into an FX-300iN by changing settings?
Do not assume so. Legal approval attaches to an evaluated model/configuration, not simply a user-selectable menu setting.
Why is the image representative?
The image is the one shown by MNM on the FX-300i listing, but its underlying filename references FX-300iN, so it is labeled transparently as variant artwork.
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