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Industrial Pressure Transmitter (4-20mA / HART)
-- Steady & Reliable Manufacturer --
Product Overview
Our Industrial Pressure Transmitters convert process pressure into a universally compatible 4-20mA analog signal (with optional HART digital overlay), enabling seamless integration with PLCs, DCS systems, and SCADA platforms worldwide. Built around a proven piezoresistive or silicon-on-sapphire sensing cell encapsulated in a robust stainless steel housing, these transmitters deliver ±0.25% FS accuracy with outstanding long-term stability. Available in gauge, absolute, and sealed gauge configurations, and with options for ATEX/IECEx explosion-proof certification and flush diaphragm designs, our transmitters serve as the backbone of modern process instrumentation across oil & gas, chemical, water treatment, and power generation industries.
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Technical Specification Sheet
| Parameter | Detail |
|---|---|
| Pressure Range | 0–0.1 bar up to 0–1000 bar (gauge, absolute, compound) |
| Output Signal | 4-20 mA (two-wire); optional HART 7 digital protocol |
| Accuracy | ±0.25% FS (standard) or ±0.1% FS (high precision) |
| Long-Term Stability | ≤±0.1% FS per year |
| Wetted Parts Material | Stainless Steel 316L; Hastelloy C-276 (optional) |
| Process Connection | G1/2, NPT1/2, M20×1.5 (standard); flange mount available |
| Power Supply | 10–30 VDC (two-wire loop-powered) |
| Explosion Protection | Optional: ATEX II 2G Ex d IIC T6 / IECEx; Intrinsic Safety Ex ia |
| Protection Rating | IP67 standard |
Key Features
- Industry-standard 4-20mA two-wire loop-powered output with optional HART 7 superimposed digital signal.
- Compact stainless steel housing with IP67 ingress protection and optional explosion-proof certification.
- HART protocol enables remote configuration, zero/span adjustment, and diagnostics without interrupting the control loop.
Typical Use Cases
- Oil & Gas Upstream: Wellhead, pipeline, and separator pressure measurement integrated into DCS/SCADA.
- Chemical Reactors: High-accuracy process pressure monitoring with remote configuration capability via HART.
- Water & Wastewater: Pump station pressure feedback for variable frequency drive (VFD) control.
- Power Plants: Steam, feedwater, and flue gas pressure measurement in boiler systems.
- Pharmaceutical: Clean steam and CIP pressure monitoring with hygienic wetted parts.
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Industrial Pressure Transmitter (4-20mA / HART) Manufacturers
Wuxi Huihua Special Instrumentation Co., Ltd. was established in December 2001, the registered capital is 5 million yuan, the existing staff of more than 50 small and medium-sized joint-stock enterprises.
The company specialises in the production of various types of special instruments, alternative to the localisation of imported instruments.To seismic pressure gauge, seismic electric contact pressure gauge, stainless steel pressure gauge, diaphragm corrosion-resistant pressure gauge, marine pressure gauge and other series as the main products. On the basis of field instruments, we have developed various kinds of pressure transmitters, pressure controllers, digital pressure gauges and so on. There are more than 30 series and 3000 specifications. Products are widely used in petroleum, chemical, paper, metallurgy, mining, chemical fibre, electric power, food, environmental protection, rubber and plastic, hydraulics and many other industries, and more than 2,000 domestic customers to establish a friendly relationship with the national large and medium-sized enterprises to establish a good partnership, won the majority of users praise, and set up a corporate brand image.
