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Precision Glass-to-Metal Sealing Solutions

High-reliability hermetic feedthroughs, sealing terminals, and optical packaging for EVs, HVAC systems, and precision instruments. ISO-certified manufacturing since 2006.

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About Capitol GTMS

Shenzhen Capitol Micro-Electronics Co., Ltd, established in 2006, is a national high-tech enterprise specializing in the research, development, and manufacturing of glass-to-metal sealed components. We are a trusted manufacturer and supplier of hermetic feedthroughs, sealing terminals, and precision packaging solutions.

Our products serve critical applications in household appliances, electric vehicles, commercial HVAC systems, laser instruments, and optical communication. With over 8,000 square meters of production space and an automated manufacturing line, we deliver high-quality, reliable components to global markets across the Americas, Asia, and beyond.

2006
Founded
8,000+
m² Facility
24/7
Support
ISO
Certified
Capitol GTMS Manufacturing Facility

Certified Quality & Compliance

ISO/TS16949 ISO14001 ISO9001 RoHS UL CCC CE MSDS REACH Test Report

Our Products

Engineered for performance, durability, and hermetic integrity in demanding environments.

EV Compressor Terminal

EV Compressor Sealing Terminal

  • • 6-42V, 144-576V, 600-800V options
  • • Three-phase sealed design
  • • For electric vehicle AC compressors
  • • Hermetic glass-to-metal seal
View Details →
HVAC Compressor Terminal

HVAC Compressor Sealing Terminal

  • • 1-3HP to 25-40HP series
  • • For household & commercial AC
  • • High-pressure resistance
  • • UL & CE certified
View Details →
Screw Compressor Terminal Board

Screw Compressor Terminal Board

  • • For commercial central AC units
  • • Piston, screw, scroll variants
  • • Hermetic sealed connector
  • • High thermal stability
View Details →
Laser Instrument Packaging

Laser Instrument Packaging

  • • TO Shell & Cap series
  • • Multi-pin glass sealed connectors
  • • For optical communication
  • • Precision hermetic sealing
View Details →
Visual Lens (Fluid Window)

Visual Lens (Fluid Window)

  • • Hermetic fluid window
  • • For instrumentation & sensors
  • • High optical clarity
  • • Resistant to harsh environments
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Automotive AC Connectors

Automotive AC Connectors

  • • High & low-pressure plastic connectors
  • • For traditional & hybrid vehicles
  • • Leak-proof sealing
  • • Durable polymer housing
View Details →
Sight Glass for Compressors

Semi-Hermetic Sight Glass

  • • For commercial screw compressors
  • • Visual refrigerant monitoring
  • • High-pressure rated
  • • Hermetic sealing
View Details →
Oil High Pressure Connector

Oil High Pressure Connector

  • • For oil & refrigerant systems
  • • High-pressure integrity
  • • Corrosion-resistant materials
  • • Long service life
View Details →
View All Products

Why Choose Capitol GTMS

🔧

Automated Production

Precision manufacturing with automated lines ensures consistency and high yield.

🛡️

Hermetic Sealing

Glass-to-metal seals provide unmatched leak-tight integrity in extreme conditions.

🌐

Global Export

Serving clients across the Americas, Asia, and worldwide with reliable delivery.

🕒

24/7 Support

Dedicated team available around the clock to assist with technical and order needs.

18+
Years in Business
8,000+
m² Production Space
10+
Certifications
Global
Market Reach

Frequently Asked Questions

What is a glass-to-metal seal?

A glass-to-metal seal is a hermetic joint between metal and glass, commonly used in electrical feedthroughs to maintain vacuum or pressure integrity while allowing electrical conduction.

Are your products RoHS compliant?

Yes, all our products comply with RoHS, REACH, and other international environmental standards. Certifications are available upon request.

Do you offer custom designs?

Yes, we provide OEM/ODM services and can customize sealing terminals, connectors, and packaging based on your specifications.

What industries do you serve?

We serve electric vehicles, HVAC systems, household appliances, laser instruments, optical communication, and industrial equipment sectors.

Get in Touch

For inquiries, quotes, or technical support, visit our official website to connect with our team.

Visit Official Website

Office Address: No.3, Tengfeng 5th Road, Fenghuang Community, Fuyong Street, Bao'an District, Shenzhen, Guangdong, China

Contact: Mr. Sanial Chan | Mobile: +86 13510408246 | WeChat: sanial

Mr. Dongxin Guo | Mobile: +86 13670292599

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