[EDN.730: Pressure Transmitter with All-Stainless Steel Housing and High-Visibility LCD]

• All stainless steel housing
• Wetted parts made of stainless steel
• Accuracy: 0.35%, 0.25%, or 0.1%
• LCD with white backlight
• Explosion-proof rating: Ex d IIB+H2 T4

The EDN.730 series pressure transmitter features a robust stainless steel housing, specifically designed to withstand corrosive environments such as those involving acids or toxic gases. Its high resistance to corrosion and external intrusion makes it ideal for demanding applications in the food & beverage, medical, pharmaceutical, and biotechnology industries.

The pressure sensor applied in this series is a piezoresistive silicon sensor with a gold-plated diaphragm made of stainless steel. This sensor has been specially developed for measuring liquid and gaseous hydrogen pressure, where hydrogen embrittlement is a known issue. Due to hydrogen's ability to permeate metal lattice structures at the atomic level, the use of a gold-plated diaphragm is essential for reliable and safe hydrogen measurement.

The EDN.730 series offers excellent accuracy and long-term stability, utilizing the latest electronic components and advanced PCB chip design to ensure maximum precision and durability. The internal electronics responsible for signal amplification have been engineered to meet the most stringent standards in noise immunity, surge protection, insulation, and burst resistance. Each unit undergoes a 100% quality control process to guarantee stable and accurate analog and digital outputs.

Standard features of the EDN.730 include:

• RS485 digital communication
• 2-channel relay/switch outputs for flexible control integration

During development, the EDN.730 was benchmarked against leading domestic and international products, undergoing over 10 types of industrial performance and durability tests. It has also passed high-level EMC and EMI testing, confirming superior resistance to harsh industrial conditions such as:

• High temperatures
• Electrical noise
• Burst signals and surges

This makes the EDN.730 a truly industrial-grade transmitter, suitable for a wide range of critical hydrogen-related and general industrial applications, including:

● Hydrogen refueling stations
● Hydrogen transportation trailers
● Hydrogen storage facilities
● Shipbuilding – hydrogen transport & storage
● Hydrogen production, refining, and chemical plants

Additionally, explosion-proof certification with rating Ex d IIC T4 is currently under review by KOSHA (Korea Occupational Safety and Health Agency). The certification is expected to be granted by mid-August 2025, following successful testing and inspection.

[General Specifications]