■ EDN.730 Pressure Transmitter

- All stainless steel housing & wetted parts

- LCD white backlight display

- RS485 communication / 2 channel relays [option]

- LCD with white backlight

- Explosion-proof (Ex d IIB+H2 T4)

■ Product Overview

The EDN.730 series pressure transmitter is constructed with a stainless steel housing designed to withstand harsh environments including acid and toxic gas exposure, ensuring resistance to corrosion and external intrusion.

The applied pressure sensor is a gold-plated piezoresistive silicon sensor mounted on a stainless steel diaphragm, specifically developed for hydrogen pressure measurement in liquid or gas form.

Due to hydrogen embrittlement and its ability to penetrate metal lattice structures, the use of a gold-plated diaphragm is essential for safe and reliable measurement.

The transmitter offers excellent accuracy and long-term stability through advanced electronic components and PCB design, ensuring high precision and durability.

■ Sensor & Electronics

The signal amplification electronics incorporate protection technologies against noise, burst, insulation, and surge. Each unit undergoes 100% inspection to ensure reliable analog and communication outputs.

The EDN.730 supports RS485 communication and 2-channel relay/switch outputs for flexible integration.

■ Performance & Testing

The product underwent more than 10 types of performance comparison tests and passed high-level EMC and EMI testing, demonstrating resistance to high temperature, noise, and burst conditions.

■ Applications

▶ Hydrogen refueling stations

▶ Hydrogen transport trailers

▶ Hydrogen storage facilities

▶ Shipbuilding – hydrogen transport & storage

▶ Hydrogen production, refining, chemical plants

■ Certification

In addition, we received a certificate for the “General Explosion-Proof Rating Ex d IIB+H2 T6 IP65” from the Korea Occupational Safety and Health Agency (KOSHA) on January 23, 2026.

■ Accuracy Class

▶ ±0.5%, ±0.25%, ±0.1% F.S

■ General Technical Specifications