Relative pressure transmitter ILW

sensitive elementIO-LinkM12 connector

Short description
The ILW series are pressure transmitters for high-temperature processes, featuring diathermic oil filling, IO-Link digital output and Functional Safety approvals (PLd / SIL2). Designed for Industry 4.0 integration and melt/oil applications.

Description
The ILW Performance Level 'd'/SIL2 transmitters use hydraulic transmission of pressure to a sensing element and provide an IO-Link digital interface for measurement data, diagnostics and auxiliary information. The mercury-free oil filling enables operation at process temperatures up to 315°C. Available accuracy classes and mechanical options make the series suitable for demanding industrial and safety-related applications.

Main features

• Pressure ranges from 0–35 to 0–1000 bar (0–500 to 0–15000 psi)
• Accuracy: < ±0.25% FS (H); < ±0.5% FS (M)
• Standard threads: 1/2-20 UNF and M18x1.5
• 17-7 PH corrugated diaphragm with GTP+ coating
• Diathermic oil filling compliant with FDA CFR 178.3620 and CFR 172.878
• IO-Link digital output (Industry 4.0 ready)
• Rangeability: approx. 3:1
• Functional Safety: PLd and SIL2 certified options
• Autozero function and extended diagnostics via IO-Link

Additional technical details and behaviour
The ILW series is engineered for melt and other high-temperature applications by using hydraulic (oil-filled) transmission to protect the sensing element from extreme process temperatures. IO-Link provides bidirectional digital communication for process values, device parameters and diagnostic/auxiliary data to support predictive maintenance and reduce downtime. The mercury-free design meets current environmental and safety requirements.

Technical characteristics / specifications

• Pressure ranges: model-dependent codes (examples): B17U = 17 bar, B35U = 35 bar, B05C = 500 bar, B01M = 1000 bar; psi equivalents up to 15000 psi
• Accuracy classes: H (≈ < ±0.25% FS for higher ranges) and M (≈ < ±0.5% FS)
• Thread options: 1/2-20 UNF (standard) and M18x1.5
• Diaphragm: 17-7 PH corrugated diaphragm with GTP+ coating
• Filling fluid: diathermic oil meeting FDA requirements (CFR 178.3620 and CFR 172.878)
• Output / Interface: IO-Link digital output (primary); optional analog outputs (e.g. 4-20 mA or 0.5-10.5 V) depending on configuration
• Connector options: e.g. M12x1.5 (5-pin) connector; other versions selectable
• Rangeability: approx. 3:1
• Functional safety: PLd and SIL2 certified options available
• Special functions: autozero; optional signed pressure data, reset-fault commands and other IO-Link extended functions
• Mechanical principle: hydraulic transmission (oil-filled) for high-temperature measurement
• Process temperature capability: up to 315°C (diathermic oil filled, mercury-free)