Hongnuo (shenyang) General Machinery Co., Ltd. is one of the most reliable manufacturers and suppliers of smart differential pressure transmitter in China. Welcome to buy high quality smart differential pressure transmitter at competitive price from our factory. We also accept customized orders.
Products Description
| Parameter | Specification |
|---|---|
| Measurement Medium: | Gas, vapor, liquid |
| Accuracy: | ±0.05%, ±0.075%, ±0.1% (including linearity, hysteresis, and repeatability from zero point) |
| Stability: | ±0.1%/3 years |
| Power Supply: | 10~36V DC (recommended 24V DC) |
| Output Signal | 4-20mA,
4~20mA+Hart
|
Please see the Specifications for more details.
Typical Applications

🛢️ Oil, Gas, and Chemical Industry
This is one of the core application areas for this type of transmitter. It is typically used in conjunction with throttling devices (such as orifice plates) to accurately measure the flow rate of gas, liquid, or steam in pipelines, or to monitor pressure and level in storage tanks and pipelines. Its excellent hydrostatic performance and corrosion-resistant material options (such as Hastelloy and Monel) are sufficient to handle the complex media and high-pressure environments in oil and gas extraction, transportation, and chemical production.
⚡ Power and Energy Industry
Within power generation and energy facilities, this transmitter monitors furnace draft pressure, steam line flow differential, and process differential pressure for a wide range of working fluids. These operating environments consistently feature high heat and elevated line pressures, which impose strict reliability and stability requirements on differential pressure instrumentation.
This unit delivers exceptional thermal error suppression, with best-in-class temperature drift as low as ±0.04%FS per 10 Kelvin - ideal for satisfying the stringent performance demands of power plant service.
🔩 Heavy Industry and Metallurgical Manufacturing
In steel and non-ferrous metal smelting, equipment needs to measure parameters such as furnace pressure and negative pressure. These applications have stringent requirements for high stability and accuracy in measurement. Similarly, in mechanical equipment such as compressor units and hydraulic systems, it is also necessary to rely on such high-performance transmitters for precise process control and monitoring.
Why Choos Single-crystal silicon differential pressure transmittere ?
For industrial process applications, a pressure transmitter's long-term stability and ability to withstand harsh working environments directly dictate line uptime and overall maintenance expenditure. When stacked against conventional diffused silicon or ceramic capacitance solutions, monocrystalline silicon sensing technology delivers clear performance edges across core operational metrics.
First, measurement precision and sustained stability. Monocrystalline silicon material features superior elastic properties and outstanding fatigue resistance. This means the sensor retains factory-calibrated performance even after years of cyclic pressure loading. Today's commercial monocrystalline silicon transmitters hit accuracy grades down to ±0.05%FS, with yearly drift held under ±0.1%FS - this drastically cuts routine calibration labor and service intervals.
Second, wide operating temperature tolerance. Monocrystalline silicon transmitters separate the sensing die from signal conditioning circuits via thermal isolation structures. An on-board temperature chip runs continuous digital compensation algorithms, which efficiently offsets zero and span drift triggered by sharp ambient temperature swings.
Key Advantages
- Single-crystal silicon sensor core, superior quality
- Annual drift ≤0.1%, no need for recalibration for three years after installation
- Stable output across the entire temperature range of -40℃ to 125℃
- 25MPa unidirectional overvoltage, undamaged under abnormal operating conditions
- All-solid-state wear-free structure, more durable under vibration conditions
- One-button zeroing in explosion-proof zone, safe operation without opening the cover
- Digital isolation + 24-bit ADC, rock-solid stability against strong electromagnetic interference
- ±0.1%/3-year long-term stability guarantee

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HNP30-B Intelligent High-Precision Monocrystalline Silicon Pressure/Absolute Pressure Transmitter |
|
|
Specific Parameters |
Value / Description |
|
Measurement Principle |
The HNP30-B transmitter core utilizes a high-precision monocrystalline silicon pressure sensor, which is placed at the top of a metal body to achieve mechanical and thermal isolation. With a microprocessor at its core, coupled with digital isolation and dual compensation technologies, it features remote operation through the Hart protocol and a one-touch zeroing function, which can reduce temperature drift, enhance anti-interference capabilities, and measurement accuracy. |
|
Pressure Type |
Gauge pressure/absolute pressure |
|
Measurement Medium |
Gas, vapor, liquid |
|
Inaccuracy |
±0.05%, ±0.075%, ±0.1% (including linearity, hysteresis, and repeatability from zero point) |
|
Stability |
±0.1%/3 years |
|
Power Supply |
10~36V DC (recommended 24V DC) |
|
Display |
LCD, OLED |
|
Transducer Housing |
Aluminum alloy material, epoxy resin sprayed |
|
Diaphragm |
316L Stainless Steel, Hastelloy C, Monel Alloy, Tantalum, Titanium, Sprayed PTFE, Special Requirements |
|
Pressure Sensing Method |
NPT1/4 pressure joint and rear welded pressure tube Φ14 |
|
Filling Fluid |
Silicone oil, fluorinated oil, high-temperature silicone oil, etc. |
|
Seal Ring |
Nitrile rubber, Fluororubber, Poly(tetrafluoroethylene) |
|
Flange Material |
Stainless Steel 304, 316L |
|
Nuts and Bolts |
Carbon steel galvanized, stainless steel |
|
Electrical Connection |
M20*1.5(standard), 1/2NPT internal thread |
|
Medium Temperature |
-40℃ ~85℃ |
|
Temperature Measurement |
-40℃~120℃ |
|
Output Signal |
4~20mA, 4~20mA+Hart |
|
Explosion Proof Type |
Flameproof, explosion-proof grade ExdⅡCT6, intrinsically safe, explosion-proof grade ExiaⅡCT6 |
|
Authentication |
CE, ISO9001, SIL |








