Explore our top-tier OEM manufactured pressure and temperature measuring instruments engineered for extreme resilience and compliant with international standards.
High-temperature air pressure measurement represents one of the most critical sensor domains in modern heavy industry, power generation, and advanced manufacturing systems.
Standard pressure gauges suffer severe calibration drift, membrane degradation, and internal fluid breakdown when exposed to ambient or media temperatures exceeding 100°C. OEM high-temperature air pressure gauges integrate microfused glass-to-metal bonding, high-temperature fill fluids (such as silicone oil rated up to 400°C), and specialized thermal fins to guarantee zero-drift measurement integrity over multi-year operational cycles.
From turbine exhaust manifolds to pneumatic glass blowers, modern industrial plants operate under aggressive thermal cycling and mechanical vibration. System integrators require customized gauge dimensions, process connection threads (NPT, BSPT, G), and ATEX/IECEx explosion-proof ratings to seamlessly embed high-temperature pressure instrumentation directly into standard machinery configurations.
Sensor failure in high-temperature lines causes unplanned plant downtime, safety hazards, and costly batch rejections. Partnering with a specialized OEM factory ensures customized Bourdon tubes made of Inconel 718 or 316L SS, reducing recalibration frequency by up to 60% and delivering a significantly lower Total Cost of Ownership over long operating lifespans.
Delivering unmatched structural resilience through material innovation, thermo-fluid isolation dynamics, and precision mechanical assembly.
Constructed utilizing seamless 316L Stainless Steel, Monel K-500, or Inconel 718 for Bourdon tubes and diaphragms, resisting high-temperature creep and corrosive atmospheric gas oxidation.
Incorporating welded pigtail or U-type siphons and cooling towers with radiating fins, reducing process temperatures from 400°C down to safe operating range at the sensor element.
All-welded sanitary and industrial diaphragm seals filled with high-temp synthetic fluid (Syltherm 800) prevent hot, particulate-laden air from directly contacting movement assemblies.
Precision movement mechanism fitted with internal silicone dampeners or liquid filling (glycerin/silicone) to absorb severe pressure pulsations and mechanical shock.
| Specification Parameter | Standard Industrial Gauge | High-Temperature OEM Gauge (Direct Mount) | High-Temp Diaphragm + Siphon Assembly |
|---|---|---|---|
| Max Process Media Temp | -40°C to +60°C | -20°C to +150°C (Unfilled) / +200°C (Option) | -40°C to +400°C (+752°F) |
| Ambient Temp Range | -20°C to +60°C | -40°C to +85°C | -40°C to +100°C |
| Accuracy Class (EN 837-1) | ±1.6% or ±2.5% Full Scale | ±1.0% (Class 1) or ±0.5% (Class 0.5) | ±1.0% High Precision Compensated |
| Wetted Materials | Brass / Copper Alloy | 316L Stainless Steel / Monel | Inconel 718 / Hastelloy C-276 / Ceramic |
| Overpressure Safety | 115% Full Scale Value | 130% Full Scale Value | 200% to 500% (Solid Front Blowout Case) |
| Ingress Protection | IP43 / IP54 | IP65 / IP66 | IP67 / Hermetically Sealed |
20 YEARS OF EXPERIENCE AND RESEARCH
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 global recognition for high corrosion resistance and ±0.5% precision accuracy.
Our laboratory conducts 100% pressure cycle tests and environmental simulations, strictly adhering to ISO 9001 and ISO 17025 calibration standards.
Continuous engineering improvement drives our industry reputation for "zero-leak" performance in extreme industrial conditions, supported by a standard 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.
How next-generation materials science and IIoT digital transformation are shaping the future of thermal pressure instrumentation.
Integration of piezoresistive microfused sensors with digital HART, Modbus RS485, and WirelessHART protocols, enabling real-time thermal telemetry directly to SCADA platforms.
Shift toward high-purity 99.9% Al₂O₃ ceramic sensing diaphragms offering chemical inertness against aggressive high-temp acidic synthetic gases up to 500°C.
Transition toward lead-free solder, RoHS 3 compliant housing materials, and zero-hazardous fill liquids designed specifically for modern green hydrogen boilers.
Embedded thermal compensation microcontrollers that use artificial intelligence algorithms to actively offset thermal expansion errors in extreme fluctuating heat cycles.
Our high-temperature pressure sensing equipment is customized for demanding industrial environments across global manufacturing sectors.
In catalytic cracking and flare gas recovery systems, exhaust air lines reach temperatures above 300°C. OEM gauges equipped with all-welded diaphragm seals and Inconel 718 Bourdon tubes prevent media crystallization and withstand aggressive sulfur gases.
Superheated steam and hot air duct pressure regulation requires high-precision instrumentation (±0.5% Accuracy) with integrated cooling siphons to protect mechanical gear movements against extreme thermal degradation.
Automated kiln pneumatic combustion lines operate with high temperature compressed air. Our solid-front phenolic and stainless steel gauges offer thermal shock resistance and blowout protection for plant personnel.
High-temperature turbocharger air pressure measurement demands ultra-fast dynamic response times and microfused sensor cores capable of enduring 50G vibrational loads under 250°C thermal conditions.
Clean-in-Place (CIP) and Sterilization-in-Place (SIP) autoclave lines require tri-clamp sanitary diaphragm pressure gauges capable of enduring continuous 135°C superheated steam cycles with zero media contamination.
Heavy-duty rotary screw compressors generate thermal pneumatic pressure spikes. Customized OEM dual-scale dial designs with liquid filling maintain needle stability under combined thermal and mechanical oscillation.
From initial mechanical drawings to batch laser calibration, our engineering department delivers complete turn-key custom pressure instrumentation solutions.
Our 20-specialist R&D team reviews your specific fluid dynamics, ambient temperatures, pressure spikes, and thread connections (NPT, BSP, Tri-Clamp) to draft custom CAD drawings.
Selection of optimal metallurgy (316L, Inconel, Hastelloy) and diaphragm isolation liquids (Syltherm, Silicone 704) rated specifically for your operational temperature envelope.
Prototypes undergo environmental chamber thermal shock (-40°C to +400°C), 100,000 cycle overpressure stress testing, and helium leak testing down to 10⁻⁹ mbar·l/s.
Automated manufacturing across our 3,000m² factory delivers over 2 million units annually, complete with customized logo dials, serial tracking, and ISO 17025 calibration certificates.
Answers to essential technical and procurement questions for engineering teams, procurement managers, and OEM partners.
From microfused electronic transmitters to heavy-duty bimetal thermometers, review our factory direct industrial instruments.
Accuracy Instrument
