Explore our primary industrial series certified for high stability, vibration resistance, and sub-zero operational reliability across global facilities.
A comprehensive industrial synthesis on material physics, sub-zero fluid dynamics, and compliance protocols governing European CE standards for cryogenic instrumentation.
In modern process engineering, handling sub-zero fluids—ranging from liquefied natural gas (LNG at -162°C), liquid nitrogen (LN2 at -196°C), liquid oxygen (LOX), and liquid carbon dioxide (LCO2) to ultra-cold hydraulic heat-transfer fluids—presents extraordinary challenges for static and dynamic pressure instrumentation. Standard pressure gauges subjected to low-temperature environments suffer from catastrophic elasticity degradation of Bourdon tubes, embrittlement of synthetic seals, internal media freezing, and severe calibration drift caused by thermal contraction of internal mechanical linkages.
As global energy transitions accelerate, demand for certified low temperature fluid pressure gauges has surged across Europe, North America, and East Asia. Engineers and procurement directors require instruments compliant with the European Union's Pressure Equipment Directive (PED 2014/68/EU) and CE marking parameters to guarantee zero-leak integrity, explosion-proof isolation, and continuous micro-accuracy under intense cyclic thermal shocks.
CE marking is not merely a regional mark; it represents a globally recognized benchmark for structural safety, electromagnetic compatibility (EMC for electronic transmitters), and overpressure limits. For low-temperature pressure instruments, CE compliance integrates several key standards:
| Performance Parameter | Standard Industrial Pressure Gauge | CE Low-Temperature Fluid Pressure Gauge | Cryogenic Diaphragm System |
|---|---|---|---|
| Operating Media Temp | -20°C to +60°C | -50°C to +100°C (Direct Media) | -196°C to +200°C (With Thermal Neck/Capillary) |
| Ambient Temp Range | -40°C to +60°C | -50°C to +65°C (Hermetically Sealed) | -50°C to +70°C (Silicone Filled Case) |
| Pressure Element Material | Phosphor Bronze / AISI 304 SS | Annealed 316L Stainless Steel / Inconel 718 | Hastelloy C-276 / Monel 400 / 316L SS |
| Case Fill Medium | Standard Glycerin (Freezes at -17°C) | Specialized Sub-Zero Silicone Oil (-50°C) | Dry Case / Fluorolube / Cryo Silicone |
| Overpressure Rating | 130% Full Scale Value | 150% - 200% Full Scale Value | 300% to 500% (Diaphragm Stop Protection) |
| Accuracy Class | Class 1.6 / 2.5 | Class 1.0 / 0.5 (ISO 17025 Calibrated) | Class 0.5 / Class 0.25 Digital Transducer |
| Leak Rate Assurance | $< 1 \times 10^{-3} \text{ mbar}\cdot\text{l/s}$ | $< 1 \times 10^{-7} \text{ mbar}\cdot\text{l/s}$ | $< 1 \times 10^{-9} \text{ mbar}\cdot\text{l/s}$ (Helium Spectrometry) |
Engineered for heavy-duty performance across critical infrastructure projects worldwide.
Deploys on liquid natural gas iso-tank containers, cryogenic bulk storage vessels, and regasification skids. Our gauges incorporate double-seal safety diaphragms to prevent vapor flash expansion and withstand sub-zero marine ambient corrosion.
Essential for monitoring low-temperature fluid cracking units, ethylene condensation circuits, and refrigeration loops. Features explosion-proof electric contacts for automatic high/low pressure alarms in hazardous zones.
Specially oil-cleaned and degreased for liquid oxygen (LOX) manifolds in hospital systems and semiconductor ultra-pure gas delivery lines, ensuring absolute contamination-free measurement.
Combining scale automation, precise metallurgical control, and direct-factory agility to deliver international-grade instruments at competitive total-cost-of-ownership.
Huzhou Accuracy Instrument operates fully integrated manufacturing lines from raw metal stamping, CNC movement machining, laser diaphragm welding, to micro-processor digital calibration. This vertical control reduces lead times by up to 40% compared to Western assembly-only operations.
Every low-temperature batch undergoes severe thermal shock testing (cycling between -50°C and ambient), 100% helium mass spectrometer leak detection, and high-frequency vibration testing, ensuring zero field failures under harsh operational stressors.
Huzhou Accuracy Instrument CO LTD is professionally engaged in the development, sales and service of industrial mechanical pressure gauges, bi-metal thermometers, SF6 manometer, pressure sensor. 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.
R&D Department (20 specialists): Focuses on material innovation, smart sensor integration, and compliance with international standards (e.g., ISO, API).
Production Workforce (120 technicians): Utilizes automated assembly and laser calibration technologies to ensure product durability and accuracy.
Sales & Service Unit (15 professionals): Provides 24/7 technical support and customized solutions across 30+ countries.
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 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.
In-depth responses for procurement engineers, system designers, and facility managers specifying low-temperature and cryogenic pressure instrumentation.
Select from our standard industrial, digital transmitter, and specialized thermal sensor portfolios engineered for demanding plant conditions.
Accuracy Instrument