Product Overview

Smart Differential Pressure Transmitter is a microprocessor-based instrument designed to measure differential pressure, liquid level, flow, and interface level in gases, vapors, and liquids. Featuring a monocrystalline silicon sensor and HART communication, it provides high accuracy, long-term stability, and remote configuration for industrial process control.

Key Features

Monocrystalline silicon sensing element delivers high measurement accuracy up to ±0.05% and excellent long-term stability.
Digital temperature and static pressure compensation minimizes drift and improves measurement reliability across varying process conditions.
HART communication capability enables remote configuration, diagnostics, calibration, and parameter adjustment.
Dual isolation and anti-interference design enhances signal integrity in electrically noisy industrial environments.
One-touch zero adjustment function simplifies commissioning and reduces maintenance time.

Typical Applications

Tank level monitoring

Filter blockage monitoring

Power generation systems

Boiler drum level control

Chemical process instrumentation

Oil & gas process control

Water and wastewater treatment

Differential pressure flow measurement

Heat exchanger performance monitoring

Pump and compressor monitoring

Pipeline pressure drop measurement

Technical Specifications

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 T-shaped external thread joint M20*1.5 Integrated three-valve set
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

OEM & Customization

Pressure range customization for low, medium, and high differential pressure applications
Process connection customization including NPT, BSP, M20×1.5, flange-mounted, and manifold configurations
Private labeling services with customized nameplates, logos, labels, and packaging
OEM documentation support including manuals, calibration reports, and technical datasheets

Certifications & Compliance

CE - Compliance with applicable European safety, health, and EMC requirements
ISO 9001 - Certified quality management system for manufacturing and process control
SIL - Functional safety certification for safety instrumented systems
Exd IIC T6 - Flameproof explosion protection for hazardous locations
Exia IIC T6 - Intrinsically safe explosion protection for hazardous locations

FAQ

Q: What measurement principle is used in this transmitter?

A: It uses a high-precision monocrystalline silicon differential pressure sensor combined with digital compensation technology and microprocessor-based signal processing.

Q: Can the transmitter be configured remotely?

A: Yes. HART-enabled models support remote configuration, calibration, diagnostics, and parameter adjustment through compatible communicators or control systems.

Q: Is the transmitter suitable for flow measurement applications?

A: Yes. It can be used with primary flow elements such as orifice plates, Venturi tubes, and flow nozzles to measure differential pressure flow.

Q: Can the transmitter be supplied with a valve manifold?

A: Yes. Integrated three-valve manifold configurations are available for installation, isolation, and calibration purposes.

Q: What documents are typically provided with shipment?

A: Standard documentation may include a calibration certificate, inspection report, operation manual, wiring diagram, and product datasheet.

Q: Are replacement spare parts available after purchase?

A: Yes. Common spare parts such as display modules, seals, manifolds, and mounting accessories can be supplied upon request.

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 T-shaped external thread joint M20*1.5 Integrated three-valve set
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

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