Strain gauge pressure transmitter K7 SIL2

voltage outputM18 x 1,51/2" UNF

Overview
The K7 series is designed for melt and high-temperature process applications with process temperatures up to 538°C (1000°F). It uses a near-incompressible hydraulic fill (NAK - sodium–potassium) to transmit pressure and thick-film strain-gauge technology to convert the mechanical quantity into an electrical voltage signal. SIL2-certified variants are suitable for Functional Safety applications in polymer processing plants.

Main features

• Hydraulic transmission with NAK (sodium–potassium) for stable pressure transmission at high temperatures
• Pressure ranges: 0–35 to 0–1000 bar (0–500 to 0–15000 psi)
• Voltage output options (multiple voltage ranges available)
• Accuracy classes: < ±0.25% FS (H); < ±0.5% FS (M)
• SIL2 certification for Functional Safety
• Autozero: on-board or external option
• Stem drift autocompensation available (SP version)
• Standard threads: 1/2-20 UNF and M18x1.5; other threads on request

Materials and temperature limits

• Inconel 718 diaphragm with GTP+ coating — up to 538°C (1000°F)
• 15-5 PH diaphragm with GTP+ coating — up to 400°C (750°F)
• Hastelloy C276 diaphragm — up to 300°C (570°F)
• 17-7 PH corrugated diaphragm with GTP+ coating — for ranges below 100 bar / 1500 psi up to 400°C (750°F)
• Stem material: 17-4PH

Typical applications

• High-temperature melt pressure measurement (engineered polymers, extrusion, injection molding)
• Process plants requiring Functional Safety (SIL2)

Technical specifications

• Model family: K7 SIL2
• Hydraulic fill: NAK (sodium–potassium)
• Pressure ranges: 0–35 to 0–1000 bar / 0–500 to 0–15000 psi
• Accuracy: < ±0.25% FS (H); < ±0.5% FS (M)
• Output signal: voltage outputs (multiple ranges configurable)
• Functional Safety: SIL2 certified variants
• Autozero: on-board or external
• Stem compensation: SP autocompensation option
• Standard threads: 1/2-20 UNF, M18x1.5 (others on request)
• Diaphragm materials and max temperatures: Inconel 718 (GTP+) up to 538°C; 15-5 PH (GTP+) up to 400°C; Hastelloy C276 up to 300°C; 17-7 PH corrugated (GTP+) for ranges <100 bar up to 400°C
• Stem material: 17-4PH