NT52C Flush Diaphragm Pressure Transmitter

Hygienic Pressure & Level Sensor

High-Performance Pressure & Level Measurement for Hygienic and Industrial Applications

The NOIKE-AH NT52C Flush Diaphragm Pressure Transmitter is engineered for accurate pressure and liquid level measurement in demanding industrial environments. Featuring a high-precision capacitive sensing core and a flush-mounted isolation diaphragm, it is particularly suitable for measuring high-viscosity, crystallizing, corrosive, or sanitary process media.

Unlike conventional pressure transmitters with recessed diaphragms, the flush diaphragm design prevents media buildup, clogging, and contamination, making it ideal for food processing, pharmaceutical manufacturing, chemical production, and other hygienic applications.

With 4–20 mA analog output and optional HART communication, the NT52C ensures reliable process monitoring, long-term stability, and excellent measurement accuracy.

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Key Features

• Flush diaphragm design prevents media buildup and clogging
• High-precision capacitive pressure sensing technology
• Suitable for pressure and liquid level measurement
• Supports 4–20 mA and HART communication
• Accuracy up to ±0.2% Full Scale
• Long-term stability better than 0.01% per year
• High-temperature operation up to 300°C
• Stainless steel or Hastelloy CR diaphragm options
• Adjustable zero point and measuring span
• Adjustable damping for stable signal output
• Explosion-proof and intrinsically safe versions available
• Ideal for hygienic, viscous, corrosive, and crystallizing media

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How the NT52C Pressure Transmitter Works

The NT52C uses a capacitive pressure measurement principle.

Process pressure is transferred through the flush isolation diaphragm and filling fluid to the sensing diaphragm inside the sensor. The diaphragm displacement changes the capacitance between two precision capacitor plates.

The electronic circuit converts this capacitance variation into a highly accurate output signal available as:

• 4–20 mA analog output
• HART digital communication

For gauge pressure models, atmospheric pressure acts as the reference. For absolute pressure models, a sealed reference chamber maintains a constant pressure reference.

The sensing diaphragm displacement is less than 0.1 mm, providing exceptional sensitivity, excellent repeatability, and outstanding long-term stability.

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Typical Applications

The NT52C is specifically designed for applications where traditional pressure transmitters may suffer from clogging or contamination.

Food & Beverage

• Dairy processing
• Beverage production
• Syrup and sugar processing
• Chocolate manufacturing
• Food mixing systems

Pharmaceutical Industry

• Sterile production equipment
• Biopharmaceutical processing
• CIP & SIP systems
• Hygienic tanks
• Fermentation equipment

Chemical Industry

• Corrosive chemicals
• High-temperature liquids
• Acid and alkali solutions
• Reaction vessels
• Process pipelines

Other Industrial Applications

• Paper and pulp industry
• Cosmetics manufacturing
• Water treatment systems
• Tank level measurement
• High-viscosity liquids
• Crystallizing media
• Slurry applications

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Technical Specifications

Parameter	Specification
Product Model	NT52C
Measuring Medium	Liquid, Gas
Measurement Type	Pressure / Level
Measuring Range	0–5000 kPa (Customizable)
Accuracy	±0.5% FS / ±0.2% FS
Repeatability	≤0.1% FS
Hysteresis	≤±0.01% FS
Long-term Stability	<0.01% / Year
Output Signal	4–20 mA, HART
Supply Voltage	12–36 VDC
Process Temperature	-30°C to 300°C
Ambient Temperature	-30°C to 85°C
Display	LCD Display
Electrical Connection	M20 × 1.5 / NPT1/2
Protection Rating	IP65
Explosion Protection	Ex d IIC T6 / Ex ia IIC T6

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Dimensional drawing (mm)

Product Features

The NT52C combines a hygienic mechanical design with advanced electronic measurement technology.

• Flush-mounted stainless steel or Hastelloy CR isolation diaphragm
• Single diaphragm construction for improved process hygiene
• High accuracy with excellent long-term stability
• Outstanding resistance to high temperatures and corrosive media
• Optional filling fluids for different process conditions
• External zero and span adjustment
• Adjustable damping to reduce pressure fluctuations
• High overload resistance
• Suitable for pressure and hydrostatic level measurement

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Why Choose the NOIKE-AH NT52C?

The NT52C offers several advantages over conventional pressure transmitters:

✔ Flush diaphragm eliminates dead zones and material buildup

✔ Ideal for viscous, sticky, and crystallizing process media

✔ Hygienic design suitable for CIP/SIP cleaning

✔ Excellent corrosion resistance

✔ High-temperature capability up to 300°C

✔ Stable measurements under demanding industrial conditions

✔ HART communication for intelligent process control

✔ Flexible OEM & ODM customization

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Available Options

The NT52C can be customized to meet different industrial requirements.

Optional configurations include:

• Custom pressure ranges
• Flush diaphragm process connections
• LCD display
• HART communication
• Explosion-proof version
• Intrinsically safe version
• Stainless steel or Hastelloy diaphragm
• Different filling fluids
• OEM & ODM manufacturing

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Frequently Asked Questions (FAQ)

What is a flush diaphragm pressure transmitter?

A flush diaphragm pressure transmitter features a sensing diaphragm that is level with the process connection. This design prevents material accumulation and is ideal for viscous, sticky, crystallizing, or sanitary media.

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Can the NT52C measure liquid level?

Yes. The NT52C can measure hydrostatic liquid level in tanks by detecting the pressure generated by the liquid column.

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Which industries is the NT52C suitable for?

It is widely used in the food, beverage, pharmaceutical, chemical, cosmetics, paper, and water treatment industries where hygienic or corrosive process conditions exist.

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Does the NT52C support HART communication?

Yes. Standard models provide 4–20 mA analog output, with HART communication available for remote configuration and diagnostics.

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Is it suitable for high-temperature applications?

Yes. The transmitter supports process temperatures up to 300°C, making it suitable for steam, hot liquids, and other demanding industrial processes.