Explore our top-tier CE-marked pressure and temperature monitoring solutions
Bottom direct mounting bimetallic thermal dynamics with high vibration tolerance.
0.6 MPa ATEX-aligned explosion protection for hazardous industrial control.
Corrosion-resistant 3-wire ceramic diaphragm for harsh chemical media.
Bottom mount electrical contact temperature sensor for process automation.
Shatter-proof fluid-filled stainless steel gauge for heavy hydraulic stress.
Radial bottom connection mechanical gauge engineered for extreme accuracy.
1/4 NPT high-pressure gauge designed for oxygen and industrial gas lines.
Automotive gas system pressure sensor with integrated resistive feedback.
Bridging mechanical reliability with European CE normative directives (PED 2014/68/EU)
In modern process industries—spanning petrochemical refining, green hydrogen distribution, high-voltage switchgear, and pharmaceutical synthesis—the synchronization of pressure and temperature measurement remains the fundamental pillar of operational safety and energy optimization. Modern pressure vessels, boilers, and compressed natural gas (CNG) storage networks demand non-stop monitoring mechanisms that guarantee zero fluid release, zero signal drift, and absolute structural integrity under cyclic thermal shock.
As industrial infrastructure transitions toward automation and predictive maintenance, mechanical pressure gauges and bimetallic thermometers must operate seamlessly alongside electronic transmitters. Standardizing instrumentation under strict European Conformity (CE) parameters—specifically the Pressure Equipment Directive (PED 2014/68/EU) and Electromagnetic Compatibility Directive (EMC 2014/30/EU)—is no longer optional; it is a critical safeguard for enterprise infrastructure.
CE Certification represents a rigorous engineering protocol governing material selection, pressure safety containment ratios, burst dynamics, and electrical contact isolation. Industrial procurement teams require detailed information gain regarding chemical compatibility matrices, temperature compensation coefficients, and overpressure protection thresholds.
Technical engineering break-down of bimetallic elements, ceramic piezoresistive matrices, and diaphragm seals
Bimetallic thermometers utilize two bonded metallic strips with significantly different thermal expansion coefficients (typically high-expansion nickel-manganese alloy paired with low-expansion Invar). When subjected to temperature variation, the differential expansion forces a precise mechanical rotation of the strip, formed into a tight helical coil.
For aggressive fluid applications where standard metallic diaphragms fail due to chemical corrosion or pitting, high-purity alumina ceramic ($Al_2O_3$) piezoresistive sensing cells offer superior durability. Printed thick-film resistors on the ceramic substrate register minute physical deflections caused by applied pressure.
Diaphragm seal gauges isolate the internal pressure-measuring spring or sensor from high-viscosity, crystallizing, or ultra-pure media using an flexible metallic membrane (Hastelloy C276, Tantalum, or 316L) filled with food-grade or high-temperature hydraulic transmission fluid.
| Instrument Parameter | Bimetallic Thermometers | Ceramic Pressure Transmitters | Explosion-Proof Contact Gauges | SF6 Gas Density Gauges |
|---|---|---|---|---|
| Accuracy Class | Class 1.0 / Class 1.5 (EN 13190) | ±0.25% / ±0.5% F.S. | Class 1.6 (EN 837-1) | Class 1.0 at 20°C ambient |
| Pressure / Temp Range | -80°C to +600°C | -1 to 600 Bar (0-60 MPa) | 0 to 100 MPa / 0-1400 Bar | 0 to 0.1 MPa (Absolute/Gauge) |
| Housing Material | AISI 304 / 316L SS | Stainless Steel / Anodized Al | Heavy Semi-Steel / Black Cast | AISI 304 Stainless Steel |
| Wetted Parts | AISI 316L Stainless Steel | 99.5% Ceramic ($Al_2O_3$) / FKM | Copper Alloy / 316L SS | AISI 316L Stainless Steel |
| Electrical Switch Rating | N/A (Optional SPDT contacts) | 4-20mA 2-Wire / 0-5V 3-Wire | 380V AC / 220V DC 30VA max | Microswitch 250V AC / 10A |
| CE Certification Standards | PED 2014/68/EU, EN 13190 | EMC 2014/30/EU, RoHS 2011/65/EU | ATEX 2014/34/EU, EN 60079 | PED 2014/68/EU, IEC 62271-203 |
20 Years of Manufacturing Precision, Metrological Integrity, & Global Service
Huzhou Accuracy Instrument Co., Ltd. is professionally engaged in the development, sales, and technical service of industrial mechanical pressure gauges, bi-metal thermometers, SF6 manometers, and advanced pressure sensors. Our products are engineered for seamless integration across demanding applications such as Mechanical Engineering, Chemical Engineering, Food Industry Processing, Pharmaceutical Manufacturing, and High-Technology Electric Power Substations.
Established over two decades ago, our state-of-the-art pressure gauge manufacturing facility spans 3,000 square meters. It is fully equipped with automated assembly lines, helium leak detectors, automated pressure calibration rigs, and climate testing chambers. As an industry leader, we combine continuous material innovation with laser precision engineering to deliver zero-defect instrumentation for global EPC contractors and distributors.
Comprising 20 specialized instrumentation engineers focused on material fatigue resilience, micro-electromechanical systems (MEMS) integration, and full alignment with international standards including ISO, API, ASME B40.100, and EN 837.
Driven by 120 certified technical specialists operating precision CNC machining, automated laser welding, dial printing, and computerized calibration benches to ensure long-term durability and ±0.5% accuracy thresholds.
Supported by 15 global technical consultants providing 24/7 engineering assistance, localized custom dial printing, OEM/ODM co-development, and rapid dispatch across 30+ countries worldwide.
Targeted measurement solutions for harsh environmental conditions and regulated industries
High-pressure hydrogen hydrocracking and catalytic reforming lines expose gauges to corrosive $H_2S$ gases and thermal spikes. Our CE-certified explosion-proof electrical contact pressure gauges (0.6 MPa to 100 MPa) feature solid-front baffle wall designs and blow-out back covers to prevent casing rupture during cataclysmic line surges.
Compressed Natural Gas (CNG) fuel dispensers and vehicle tanks require compact, shock-proof pressure indicators equipped with electronic resistive switch outputs. Our CE-marked CNG gauges withstand constant road vibration, ambient thermal swings (-40°C to +85°C), and cyclic pressure pulses up to 200 bar.
Sanitary process loops mandate zero dead-space and zero contamination risk. Our flush-mount electric contact diaphragm seal pressure gauges incorporate electro-polished AISI 316L stainless steel diaphragms (Ra < 0.38µm) compliant with CIP (Clean-in-Place) and SIP (Sterilize-in-Place) procedures.
Adhering to ISO 9001:2008 benchmark quality standards with 100% pressure cycle testing
Our quality control laboratory conducts 100% pressure cycle endurance testing, helium mass spectrometry leak detection, and environmental thermal cycling simulations on every production batch, adhering strictly to ISO 9001 and ISO 17025 metrology guidelines.
Continuous process improvement drives our global reputation for zero-leak performance under extreme industrial conditions. Every standard and customized gauge is backed by a comprehensive one-year replacement warranty and factory calibration certificates traceable to international standards.
Next-generation smart measurement, IoT wireless integration, and eco-friendly insulating media
Integrating non-contact optical encoders within classical mechanical Bourdon dial housing, allowing physical visual verification while simultaneously transmitting digital telemetry via IO-Link.
Deploying energy-harvesting piezoresistive transmitters capable of wireless long-range data transmission over 10-year battery cycles in remote pipeline networks.
Pioneering density switch calibrators optimized for Clean Air, N2/O2 mixtures, and Fluoronitriles ($C_4F_7N$) insulating gases to support carbon-neutral electric grid transformations.
As global regulatory frameworks enforce stricter leak prevention and energy optimization protocols, selecting pressure and temperature instruments manufactured under verified CE and ISO quality management systems ensures optimal lifecycle performance. Huzhou Accuracy Instrument Co., Ltd. continues to drive metrological precision through rigorous structural engineering, material science innovations, and responsive customer-centric customization.
In-depth technical diagnostic guide for instrumentation engineers and procurement specialists
Complete product catalog options for extreme environments, compact spaces, & process integration
CE-certified high-performance industrial process transmitter built for rugged field service.
Stainless steel back mounted thermometer engineered for compact panel installations.
Black semi-steel casing compact electric switch contact pressure gauge.
Industrial differential and gauge pressure transmitter for advanced process loops.
Precision stainless steel capsule gauge designed for sensitive low-pressure gas monitoring.
Heavy-duty liquid filled vibration-proof pressure gauge for extreme shock conditions.
CE certified 0.6 MPa electrical contact gauge with chemical diaphragm isolation.
Explosion-proof design for hazardous petrochemical and sanitary processing environments.
Accuracy Instrument