Explore our primary CE-certified glass micro-fused silicon pressure transmitters designed for high-stress hydraulic systems, oil & gas, and heavy equipment across Sweden.
Sweden’s industrial sectors—ranging from advanced heavy vehicle manufacturing in Gothenburg and autonomous underground mining in Kiruna to cutting-edge green steel transition (HYBRIT) in Luleå—require sensing components capable of enduring extreme operational stress. In cold sub-zero Scandinavian environments where thermal expansion and contraction cycles rapidly degrade standard organic seals, traditional pressure transducers utilizing elastomeric O-rings frequently experience micro-fractures, material embrittlement, and catastrophic pressure drops.
As Swedish original equipment manufacturers (OEMs) and process engineering leaders push toward higher efficiency, zero-maintenance lifecycles, and strict zero-emission standards, Glass-to-Metal Seal (GTMS) pressure sensors have emerged as the definitive technical standard. By replacing organic seal rings with inorganic, high-temperature glass preforms fused at over 1,000°C directly to stainless steel or Kovar headers, GTMS technology establishes a true molecular bond. This hermetic barrier delivers an helium leak rate of less than $1 \times 10^{-9} \text{ mbar}\cdot\text{l/s}$, offering unprecedented immunity to outgassing, high burst pressures up to 10 times nominal rating, and total resistance to corrosive hydraulic fluids, synthetic oils, and hydrogen gas.
The core of our high-precision pressure transducers relies on Micro-fused Silicon Technology (glass micro-fusion). Silicon piezoresistive strain gauges are fused to a custom-machined 17-4PH or 316L stainless steel diaphragm using specialized inorganic high-temperature glass frit. This process completely eliminates organic epoxies and glues, which are notorious for temperature-induced creep, thermal hysteresis, and long-term signal drift in high-vibration applications.
By carefully matching the Coefficient of Thermal Expansion (CTE) of the borosilicate glass preform with the housing alloy (Kovar or SS316L), the seal maintains balanced mechanical compression during dynamic thermal swings between -50°C and +175°C without structural micro-cracking.
Swedish heavy machinery experiences violent hydraulic pressure spikes (fluid hammer effect). Glass micro-fused diaphragms withstand over-pressure up to 5× nominal and burst pressure up to 10× without zero-point calibration drift or diaphragm rupture.
For ultra-pure gases (such as medical oxygen or green hydrogen applications), organic seals leak volatile organic compounds (VOCs). GTMS headers ensure 100% inorganic glass-metal purity, meeting stringent EU and Scandinavian cleanliness specs.
Sweden’s industrial ecosystem possesses unique environmental challenges and technical specifications. Our Glass to Metal Seal pressure sensors are specifically customized to serve key Swedish industrial epicenters:
In sub-zero underground iron ore mines operated by LKAB or in heavy electric trucks manufactured by Scania and Volvo, equipment encounters continuous vibration (>20g), cold oil startup pressure shocks, and acidic ambient moisture. GTMS sensors provide reliable 0.5% FS accuracy for transmission hydraulics, braking lines, and suspension pressure monitoring.
The Swedish green steel initiative (HYBRIT) requires high-pressure hydrogen storage and delivery systems. Standard elastomer seals suffer from hydrogen embrittlement and high permeability. Our hermetically sealed glass-to-metal pressure transmitters eliminate gas penetration pathways, ensuring safety in 350-700 bar hydrogen processing.
Deep-sea offshore wind substations, naval vessels, and seabed exploration tools demand pressure transmitters capable of resisting salt-spray marine corrosion and hyperbaric external pressures. Fully laser-welded SS316L housings with GTMS electrical pass-throughs guarantee long-term submersion without salt ingress.
Sweden’s extensive municipal district heating grids and heavy paper pulp processing mills require pressure monitors for superheated steam and aggressive chemical black liquor. GTMS sensors deliver maintenance-free continuous operation in thermal fluid loops up to +150°C.
While European sensor manufacturing often suffers from long lead times and high overhead costs, our specialized manufacturing plant in China combines high-precision GTMS glass firing kilns, automated SMT cleanrooms, and laser calibration equipment. We offer Swedish engineering teams a resilient, agile, and cost-effective supply chain partner.
Achieve substantial total cost of ownership savings on bulk OEM sensor contracts without compromising on sensor precision, response time, or material longevity.
Rapid turn-around on custom thread fittings (G1/4, NPT1/4, M12x1.5) and specialized connector harnesses (Deutsch DT04, Packard, M12 4-pin) tailored to Swedish OEM mechanical drawings.
Every single unit undergoes 100% helium mass spectrometer leak detection and thermal chamber cycle testing (-40°C to +125°C) before dispatch.
Huzhou Accuracy Instrument Co., Ltd. is professionally engaged in the development, sales, and service of industrial mechanical pressure gauges, bi-metal thermometers, SF6 manometers, and advanced pressure sensors. Products are widely used in various applications such as Mechanical Engineering, Chemical Engineering, Food Industry, Pharmaceutical, and high-technology electric appliances.
Established over two decades ago, our pressure gauge manufacturing facility spans 3,000 square meters, equipped with advanced production lines and rigorous quality control systems. As an industry leader, we integrate innovation with precision engineering to deliver reliable measurement solutions for global clients.
Annual output exceeds 2 million units, covering industrial-grade gauges (e.g., stainless steel gauge, black steel gauge, shock-proof gauge, SF6 gauge, thermometer, pressure sensor) for oil/gas, HVAC, and pharmaceutical sectors.
Products exported worldwide, with certifications including ISO, SGS, and CE, earning recognition for corrosion resistance and ±0.5% precision.
Our laboratory conducts 100% pressure cycle tests and environmental simulations, adhering to ISO 9001 and ISO 17025 standards. Continuous improvement drives our reputation for "zero-leak" performance in extreme conditions, supported by a one-year comprehensive warranty.
We have long followed the concept of "reasonable price, accurate delivery, good quality" and several business management models to keep our production quality above the required benchmark under ISO9001:2008 certified.
To assist Swedish system integrators and procurement directors in selecting the optimal sensing architecture, the table below compares key engineering parameters across sensing technologies:
| Performance Characteristic | Glass-to-Metal Seal (GTMS) MEMS | Ceramic Capacitive (Piezoresistive) | Standard O-Ring Piezoresistive |
|---|---|---|---|
| Hermetic Seal Leak Rate | < 1 × 10⁻⁹ mbar·l/s (Helium Tight) | 1 × 10⁻⁵ mbar·l/s (Glue Dependent) | 1 × 10⁻⁴ mbar·l/s (Organic Degradation) |
| Operating Temperature Range | -50°C to +175°C | -40°C to +125°C | -20°C to +85°C |
| Burst Pressure Capacity | 500% to 1000% FS | 200% to 300% FS | 200% to 400% FS |
| Resistance to Hydrogen / Outgassing | Immune (100% Inorganic Glass/Metal) | Moderate (Permeation through seal joints) | Poor (High risk of hydrogen embrittlement) |
| Vibration & Shock Shock Load | > 50g shock, 20g continuous vibration | Brittle under extreme mechanical impact | Moderate (O-ring wear under vibration) |
| Long-Term Calibration Drift | < 0.1% FS / Year | < 0.25% FS / Year | > 0.5% FS / Year |
As Sweden transitions towards fully automated smart factories, digital twin monitoring, and green energy export, pressure sensors must evolve beyond analog signals. Huzhou Accuracy Instrument is pioneering key advancements in glass-metal fusion and digital integration:
Integration of ultra-compact signal conditioning ASICs directly inside the GTMS housing, allowing point-to-point IO-Link communications, diagnostic self-checking, and temperature telemetries for Swedish smart automated production lines.
Development of next-gen high-entropy alloy housings welded with special low-melting point ceramic-glass formulas to survive extreme cryogenic liquids (-196°C LNG/LH2) down to absolute zero seal leakage.
Reducing header diameter to under 10mm for space-constrained subsea robotics, autonomous mining drills, and compact automotive hydrogen fuel cell stacks.
Comprehensive range of industrial pressure sensors, SF6 gas density monitors, oxygen gauges, and bimetallic thermometers available for immediate OEM delivery to Sweden.
In Sweden, ambient temperatures in regions like Norrbotten regularly drop below -30°C to -40°C. Standard rubber or fluoroelastomer O-rings lose elasticity, contract, and form micro-gaps, leading to fluid or gas leaks and premature system failures. Glass-to-Metal Seals create an inorganic molecular hermetic bond between fused borosilicate glass and stainless steel headers. They remain completely unaffected by sub-zero freezing, high thermal shock, or chemical oxidation over decades of operation.
Yes. We offer complete OEM/ODM engineering customization. We regularly manufacture GTMS pressure sensors with custom process connections (G1/4 DIN 3852-E, NPT1/4, 7/16-20UNF), electrical connectors (Deutsch DT04-4P, M12x1 4-Pin, Packard Metri-Pack, Hirschmann DIN 43650C), and specialized output signals (4-20mA 2-wire, 0.5-4.5V ratiometric, 0-10V, or Modbus RS485).
For standard catalog orders, production takes approximately 10 to 14 business days. For customized OEM prototypes, initial samples are prepared within 2 to 3 weeks. Express air freight (DHL/UPS/FedEx) delivers directly to major Swedish industrial hubs within 4 to 6 business days. Bulk container shipments are handled via sea freight to Gothenburg Port with full customs compliance support.
Our GTMS micro-fused silicon pressure sensors utilize piezoresistive strain gauges glass-bonded directly to a solid stainless steel diaphragm (17-4PH or 316L). Because there is no internal oil cavity or intermediate diaphragm membrane to rupture, the unit inherent shock rating exceeds 50g (11ms) and can endure over 10 million dynamic pressure pulse cycles without zero-point offset or calibration drift.
Absolutely. All products exported to Sweden and the European Union strictly adhere to CE marking requirements, EMC Directive 2014/30/EU, RoHS 3 (Directive 2015/863), and REACH regulations. We provide full certificate of conformity (CoC), material test reports (EN 10204 3.1), and helium mass spectrometer leak test certification upon request.
Partner with a trusted China manufacturing factory backed by 20+ years of precision engineering experience, automated glass-to-metal sealing technology, and strict CE/ISO quality standards.
Send Inquiry Now
Accuracy Instrument
