Huba Control Type 555 Hydrogen Pressure Transmitter

Type 555 is a stainless-steel welded relative pressure transmitter designed for gaseous hydrogen pressure monitoring in fuel-cell vehicles, hydrogen tanks and stationary storage/handling installations. The measurement cell uses thick-film technology with no elastomeric process seals.

Manufacturer-published technical data

• Range: 0–10 to 0–900 bar relative, selected by order code
• Outputs: 0–5 V, 0–10 V, ratiometric 10–90%, 4–20 mA options
• Accuracy: ±0.5% full scale on the manufacturer’s hydrogen product flyer
• Ambient and media temperature: −40 to +85°C
• Response: manufacturer typical ~1 ms; max under 2 ms for 10–90% step
• Protection: IP67 or IP69K depending on ordered connector and sealing
• Process materials: pressure connection AISI 316L, sensing diaphragm stainless 1.4435

Hydrogen and explosive-atmosphere approval distinction

Huba reports EC79/2009 hydrogen vehicle type approval and ISO 16750 vehicle environment testing. EC79 approval is not ATEX or IECEx hazardous-area certification. No blanket Zone 0/1/2 installation approval is asserted. Check actual order code, gas compatibility, pressure rating and relevant hazardous-area certificate before deployment.

Official manufacturer resources

Huba 555 original technical specification and certificate index · Type 555 product datasheet (PDF) · Hydrogen variant flyer.