Silicon pressure transmitter HIX

MEMSHART4-20 mA

Overview
The HIX series are IMPACT technology pressure transmitters without transmission fluid, engineered for high-temperature melt and process applications up to 350°C. The process pressure is transferred through a thick process membrane directly to a silicon micromachined sensing element, enabling robust mechanical design while preserving high measurement performance.

Main features

• "Fluid-free" design—no filling fluids between process and sensor
• Measuring ranges: 0–10 to 0–1000 bar (0–150 to 0–15,000 psi)
• Accuracy classes: < ±0.25% FS (H) and < ±0.5% FS (M)
• Digital interface options: Smart / HART
• Process temperature rating up to 350°C

Technology and benefits
IMPACT technology places a silicon micromachined sensing element directly behind a high‑thickness process membrane. The element requires minimal deflection, allowing a process membrane ~15× thicker than traditional melt sensors. This construction improves mechanical strength, resistance to aggressive media and stability in extreme thermal conditions—reducing downtime and maintenance needs in industrial processes.

Certifications and functional safety
The HIX series is available with ATEX and IECEx hazardous-area approvals and carries SIL2 and PLd functional safety certifications, supporting installation in safety-related loops and regulated environments.

Applications

• Melt processing and polymer production at high temperatures
• Industrial reactors and lines handling viscous or abrasive media
• Process plants requiring hazardous-area approval and functional safety

Technical specifications

• Output signal: 4–20 mA / HART
• Rangeability: 3:1
• Process temperature: up to 350°C
• Stem thermal drift: < ±0.0036% FS
• Standard process connections: 1/2-20 UNF, M18x1.5
• Autozero: on-board or external option
• Process membrane: high-thickness 15-5 PH stainless steel with GTP+ coating
• Available accuracy classes: H (< ±0.25% FS), M (< ±0.5% FS)
• Certifications: ATEX, IECEx, SIL2, PLd (other regional approvals available)