080A131 Curved Surface Magnet Procurement Verification Guide
080A131Counterfeit, refurbished, or mislabeled accessory magnets for magnetic field sensors can introduce measurement errors up to 15% in field calibration and degrade system repeatability. The 080A131 curved surface magnet, a 1.0-inch diameter accessory from Amphenol The Modal Shop, requires systematic verification before integration into precision sensing assemblies. This guide provides concrete inspection, measurement, and acceptance criteria for engineers and procurement professionals sourcing this Sensor, Transducer Accessories component.
Visual and Marking Inspection: Laser Etch vs. Ink Marking
Authentic 080A131 units feature laser-etched part numbers on the curved surface. Counterfeit units often use ink pad printing, which wears off under solvent wipe tests or shows irregular font spacing. Use a 10x loupe to inspect marking edges: laser etching produces sharp, non-bleeding characters with a slight depth (0.01–0.05 mm). Ink marks appear raised, smudge under isopropyl alcohol, and lack the uniform gray contrast of laser ablation.
Decode the date code (YYWW format, e.g., 2345 for week 45 of 2023) on the magnet body. The manufacturing lot should align with Amphenol The Modal Shop's production records. Units with missing, double-stamped, or erased date codes should be rejected. For high-value applications, request a Certificate of Authenticity from the distributor and cross-reference the lot number with the manufacturer's traceability database.
Dimensional and Magnetic Flux Density Measurement
Parameter verification requires a calibrated digital caliper (resolution 0.01 mm) and a Hall-effect gaussmeter (accuracy ±1% of reading). The 080A131's 1.0-inch diameter must measure 25.40 ±0.13 mm across the curved face. Measure at three orientations; reject if any reading exceeds the tolerance.
Surface magnetic flux density at the center of the curved face should be measured with the gaussmeter probe in direct contact. Although the exact gauss value depends on the magnet grade (typically N35 or N42 for similar Amphenol accessories), a baseline of 1500–2500 G at 25°C is expected for a 1-inch curved magnet. Record the value and compare against the lot average. A deviation greater than ±15% from the mean indicates magnetization inconsistency or demagnetization from improper handling.
| Parameter | Value | Engineering Meaning |
|---|---|---|
| Accessory Type | Magnet | This parameter indicates the component is a passive magnetic element, not an active sensor. |
| Diameter | 1.0 in (25.4 mm) | Ensures fit with standard magnetic field sensor mounting fixtures. Typical tolerance ±0.13 mm. |
| Surface Shape | Curved | Matches cylindrical sensor housings or curved test surfaces for uniform magnetic coupling. |
| For Use With | Magnetic Field Sensor | Confirmed compatibility with Amphenol The Modal Shop and equivalent magnetic field probes. |
| RoHS Status | Compliant | — |
| Magnet Material | Specialty parameter — see datasheet | Grade and coating affect corrosion resistance and maximum operating temperature. |
| Maximum Operating Temperature | Specialty parameter — see datasheet | Values above 80°C may cause irreversible demagnetization in standard NdFeB magnets. |
The diameter and surface shape are the two most critical specs for procurement verification. A 0.2 mm undersized magnet will not seat securely in the sensor adapter, introducing air gaps that reduce flux coupling by 20–30%. The curved surface geometry must match the sensor's mating radius; a mismatch causes point contact instead of full-area contact, leading to inconsistent field readings during calibration. Always request the manufacturer's drawing or 3D model for mating surface radius confirmation.
X-Ray and Decapsulation for High-Value Applications
For mission-critical systems (aerospace test stands, automotive NVH labs), X-ray inspection reveals internal cracks, voids, or non-uniform grain structure in the magnet body. Place the 080A131 on a flat X-ray stage with the curved face upward. Scan at 50–80 kV with 100 μA current. Acceptable criteria: no cracks longer than 0.5 mm, no voids larger than 0.2 mm diameter, and uniform density across the cross-section.
Decapsulation (destructive analysis) is reserved for incoming quality audits. Use a diamond saw to section the magnet along its axis. Polish the cross-section and examine under a metallurgical microscope at 100x. Authentic sintered NdFeB magnets show a uniform, fine-grained microstructure with no delamination between the magnet body and any protective coating. Counterfeit units may show layered construction (bonded magnet with filler) or large pores indicating low-density sintering.
Packaging and Certificate of Analysis Cross-Check
Each 080A131 should arrive in anti-static foam or individual compartments with the Amphenol The Modal Shop logo and part number. Verify the packaging label matches the product: incorrect labels on bulk reels indicate repackaging or potential mix-up. Cross-reference the Certificate of Analysis (COA) for flux density, dimensional measurements, and lot acceptance date. The COA must include the manufacturer's signature or digital stamp; unsigned COAs are grounds for rejection.
Implement an AQL sampling plan per ANSI/ASQ Z1.4-2018. For normal inspection level II, lot size 51–90 units: sample size 13, accept on 0 defects for critical parameters (diameter, flux density), accept on 1 defect for minor parameters (packaging condition, marking clarity). Reject the entire lot if any critical parameter fails. Document the inspection results with photos and measurement logs for supplier corrective action requests.
Frequently Asked Questions About 080A131
Frequently Asked Questions About 080A131
What is the 080A131 equivalent part number?
The 080A131 is listed as its own cross-reference. For alternative curved surface magnets with similar 1.0-inch diameter, check sibling parts 080A107, 080A121, and 081A40 from Amphenol The Modal Shop. Always verify magnetic flux density and mounting dimensions before substitution.
How do I measure the magnetic field strength of the 080A131?
Use a calibrated Hall-effect gaussmeter with ±1% accuracy. Place the probe at the center of the curved surface in direct contact. Measure at 25°C ambient. Compare the reading against the lot average provided in the Certificate of Analysis. A deviation beyond ±15% indicates a potential magnetization issue.
Is the 080A131 RoHS compliant?
Yes, the 080A131 is RoHS compliant. Verify the compliance statement on the packaging or request a RoHS declaration from the distributor. The magnet does not contain restricted substances such as lead, mercury, or cadmium above threshold limits.
Where can I find the 080A131 datasheet?
The datasheet for 080A131 is available from Amphenol The Modal Shop or authorized distributors. It includes dimensional drawings, magnetic flux density curves, temperature derating, and handling precautions. Request the latest revision to ensure compatibility with your magnetic field sensor model.
Procurement workflow summary: Upon receipt of 080A131 units, perform visual marking inspection under 10x loupe, verify diameter with calipers (25.40 ±0.13 mm), measure surface flux density with gaussmeter (reject if >±15% from lot mean), and cross-check packaging labels against COA. For high-reliability applications, add X-ray inspection for internal defects. Use AQL sampling plan level II with zero critical defects. Document all results for supplier performance tracking. This systematic approach reduces the risk of counterfeit or out-of-spec magnets compromising magnetic field sensor calibration accuracy.
