IJ Instruments is a reliable source for Huba Control pressure transmitters — Swiss-engineered instruments built on proven ceramic and thick-film sensing technology, for industrial process, HVAC, refrigeration and railway applications. Two ranges are available: the compact Type 528 for everyday process pressures, and the high-pressure, hermetically welded Type 520 for demanding and safety-critical duty up to 1000 bar.
Product Range
Choose by pressure range and application — a quick comparison follows below, or open either model for full technical specifications.
Compact ceramic-cell pressure transmitter for relative pressure up to 60 bar and absolute pressure up to 16 bar, built on Huba Control's proven ceramic sensing technology with negligible temperature influence on accuracy.
Hermetically welded, seal-free stainless steel measuring cell using Huba Control's thick-film technology — for relative pressure up to 1000 bar, with railway (EN 45545-2) and ammonia/refrigerant compatibility.
Quick Comparison
| | Type 528 | Type 520 |
|---|---|---|
| Sensing Technology | Ceramic (Al₂O₃ 96%) | Thick-film, hermetically welded SS cell |
| Relative Pressure Range | -1 … 0–60 bar | -1 … 9 bar / 0 … 2.5–1000 bar |
| Absolute Pressure Range | 0 … 1–16 bar | — |
| Best For | Everyday process & industrial pressure | High pressure, HVAC, refrigeration, railway |
| Special Approvals | ATEX, IECEx, UL, NSF 61 | ATEX, IECEx, UL, EN 45545-2 (railway), WRAS |
| Medium Compatibility | Liquids & gases | Liquids, gases & refrigerants incl. ammonia |
| Seal Design | O-ring / profile seal per connection | Hermetically welded — no seal, no leak path |
Where They're Used
Gauge, absolute and vacuum pressure measurement across process industries.
Compatible with common refrigerants and ammonia for chiller and refrigeration plant monitoring.
Type 520 carries EN 50155 / EN 45545-2 railway approval for rolling-stock applications.
NSF/ANSI 61 and WRAS-approved variants available for potable water systems.
Oxygen-service configurations available for medical and industrial gas applications.
ATEX and IECEx intrinsically-safe versions for Zone-rated hazardous locations.
Share your pressure range and application for a free technical consultation.