DatasheetThe UNIK 5900 SIL is the safety-certified version of the proven UNIK 5000 platform. Specifically developed for demanding and safety-critical applications in the process industry, as well as oil and gas sectors, this sensor is SIL2-certified according to IEC 61508. It combines wide pressure ranges, excellent long-term stability, flexible configurability, and robust construction – making it ideal for continuous use in harsh environments.
Key Features:
- Pressure ranges from 2 to 700 bar (30 to 10,000 psi)
- Total accuracy (non-linearity, hysteresis, repeatability) up to ±0.04% FS (Best Straight Line)
- Stainless steel construction for high media compatibility
- SIL2 certified according to IEC 61508:2010
- Integrated terminal housing – available with short or long body
- Frequency response up to 3.5 kHz
- 4–20 mA output (2-wire)
- Wide selection of electrical and pressure connectors (e.g., G1/2, 1/2″ NPT)
- Operating temperature range: –40 °C to +125 °C
- Optional explosion-proof certifications (ATEX, IECEx, FM)
Technical Specifications (Excerpt):
| Category | Values / Options |
|---|---|
| Gauge ranges | 2 to 50 bar |
| Absolute ranges | 2 to 700 bar |
| Overpressure limit | Up to 1.5 × FS |
| Long-term stability | ±0.05% FS / year (typical) |
| Power supply | 7–28 V DC |
| Output signal | 4–20 mA, 2-wire |
| Zero/span adjustment range | ±5% FS |
| Ingress protection | IP66 / IP67 depending on configuration |
| Media compatibility | Stainless steel 316L, Hastelloy C276 (depending on range) |
| Certifications | ATEX, IECEx, FM, CE, RoHS, SIL2 |
| Temperature compensation | ±0.5% FS over –10 °C to +50 °C (Premium) |
Performance Grades & Accuracy:
| Performance Grade | Accuracy (BSL) | Temperature Error (–10 °C to +50 °C) |
|---|---|---|
| Industrial | ±0.2% FS | ±0.75% FS |
| Improved | ±0.1% FS | ±0.50% FS |
| Premium | ±0.04% FS | ±0.50% FS |
Special Features & Benefits:
- Fast response times due to high frequency range
- Suitable for aggressive media in harsh environments
- Explosion-proof, flameproof or intrinsically safe versions available
- Online configuration and modular design allow custom solutions
- Optional protection against dust and gas explosions
Typical Applications:
- Process industry (oil, gas, petrochemical)
- Safety-related pressure monitoring (SIL applications)
- High-pressure and vacuum systems
- Fixed installations requiring explosion protection