Catalog Number - 95025-04-5R

The 95025-04-5R MICROSOLV Headspace Caps are a made‑to‑order, high‑performance solution combining fully laminated silicone/PTFE septa with magnetic bimetallic cap construction, delivering excellent chemical inertness, easier crimping, and compatibility with automated systems.

These caps are fitted in 20 mm red bimetallic magnetic closures with an 8 mm center hole, providing enhanced sealing surface area, consistent autosampler access, and efficient handling in high‑throughput laboratory environments.

✅ Recommended for automated workflows requiring magnetic caps with optimized crimping performance

Bimetallic Magnetic Caps – Easier Crimping + Automation

• Bimetallic construction provides:

  • Magnetic handling compatibility

  • Easier crimping vs. full steel caps

• Red finish enables:

  • Visual identification

  • Workflow organization

✅ Ideal for automated headspace systems and high‑throughput labs

Fully Laminated Silicone/PTFE Septa – Maximum Inertness

• Transparent blue silicone rubber / transparent PTFE

• PTFE laminated on both sides

• Provides:

  • Excellent chemical resistance

  • Minimal extractables

  • Low background interference

✅ Ideal for trace‑level and high‑purity analyses

Soft Septa – Easy Needle Penetration

• Durometer: 45 Shore A (soft formulation)

• Septa thickness: 3.2 mm

• Provides:

  • Reduced needle resistance

  • Smooth penetration

  • Less needle wear

✅ Improves autosampler reliability and injection consistency

8 mm Center Hole – Enhanced Seal Integrity

• Smaller opening provides:

  • Increased septa contact area

  • Improved sealing performance

• Maintains:

  • Reliable autosampler access

✅ Ideal for tight sealing with automated systems

Wide Temperature Range – Headspace Ready

• Operating range:

  • -60°C to 200°C

✅ Suitable for:

• Heated headspace GC

• Volatile and semi‑volatile compounds

• Broad analytical conditions

Crimp Top Design – Secure Seal Integrity

• 20 mm bimetallic magnetic crimp cap

• Provides:

  • Airtight sealing

  • Reduced evaporation

  • Reliable volatile sample containment

✅ Critical for accurate headspace GC results

Designed for 20 mm Headspace Vials

• Compatible with:

  • 20 mm crimp‑top headspace vials

✅ Ensures:

• Proper fit

• Consistent analytical performance

Performance Positioning – Automation + Ease‑of‑Use Premium Option

• Compared to full steel magnetic caps:

  • ✅ Easier crimping

• Compared to aluminum caps:

  • ✅ Magnetic automation capability

• Compared to partial laminate septa:

  • ✅ Maximum inertness

✅ Ideal for:

• automated GC headspace systems

• high‑throughput laboratories

• sensitive analytical workflows

Typical Applications

• Automated headspace GC analysis

• Pharmaceutical QA/QC

• Environmental VOC testing

• Food and flavor analysis

• High‑throughput analytical labs

Important Usage Notes

• Requires 20 mm crimping tool for proper sealing

• Magnetic caps:

  • Require compatible autosampler systems

• Fully laminated septa provide:

  • Maximum inertness

  • Reliable resealing

✅ Best suited for:

• automated, high‑purity, high‑throughput workflows

🚨Made‑to‑Order & Pricing Information

This is a custom, made‑to‑order item.

• Please contact Customer Service for formal quotation, lead time, and ordering assistance. Classification: