A leading maker of portable medical and laboratory devices commissioned 3,000 miniaturized enclosures for handheld diagnostic instruments. Sanjun delivered 5052 aluminum shells with integrated EMI shielding, IP65 sealing and ergonomic rounded profiles built to ISO 13485 standards.
Precision-engineered precision instrument enclosures built to your exact specifications
From initial concept to final delivery –every detail of this custom fabrication project
As demand for high-precision analytical and diagnostic instruments surges, a leading portable medical and laboratory device manufacturer launched a 2026 program for 3,000 handheld units. Deployed in clinical diagnostics, environmental monitoring and field testing, the enclosures had to balance miniaturization, structural integrity and a refined, ergonomic feel.
The brief demanded ultra-tight dimensional accuracy, corrosion resistance, IP65 protection and integrated EMI shielding for sensitive sensors.
Handheld instruments pack a lot of sensitive electronics into almost no space, and every fraction of a millimeter matters.
The engineering challenge was miniaturized precision. At roughly 150 x 80 x 30mm, the enclosure could not afford any offset against the internal circuit boards, and a bent edge had to feel comfortable in the hand while sealing to IP65.
Sanjun ran production under ISO 13485 medical-device discipline. An 8000W fiber laser cut the body and panels with nitrogen assist to keep thin aluminum flat, while a 9-axis press brake with custom micro-jigs formed the rounded profile. Conductive silicone gaskets were laser-cut and bonded under laser alignment to guarantee continuous EMI shielding, and electroless nickel plating gave the aluminum body a smooth, corrosion-resistant 10um finish.
FEA-optimized internal ribs delivered a 25% weight cut while retaining 95% of the strength of a thicker shell, and CMM feedback with SPC held every batch to +/-0.03mm.
The 3,000 units shipped five days early with a 100% pass rate across CMM, 1,000-hour salt-spray, EMI shielding (over 60dB) and IP65 tests.
After eight months across 50-plus clinical and field environments, the client reported a 32% drop in device maintenance requests and a 20% rise in customer satisfaction, then signed a three-year partnership covering five new instrument series.
Sanjun’s expertise in miniaturized precision sheet metal is exactly what our instruments demand. The enclosures are light, sealed, and our sensor readings are clean thanks to the shielding integration.
Eight reasons global brands partner with SanJun Hardware for precision sheet metal fabrication
Quality-managed production with documented processes and full traceability at every stage.
Streamlined scheduling and capacity planning ensure your orders ship when promised.
Expert design-for-manufacturing review at no cost –optimize your design before production.
Sheet metal ±0.1mm and CNC machining ±0.01mm –consistent accuracy across every batch.
From laser cutting and bending to welding, coating and assembly –all under one roof.
CMM inspection, coating adhesion tests, and 100% final inspection before every shipment.
Prototypes from 1 unit to production runs of 10,000+ –scalable capacity to match your needs.
Work directly with our engineering team –fast responses, clear updates, no middlemen.
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