Specifications General Type: Differential Pressure Transmitter Series: ABB 266 HRH (High Pressure Differential) Output: 4–20 mA two-wire with HART communication Sensor Technology: Digital capacitive sensor with temperature compensation Measurement Performance Reference Accuracy: ±0.04% of span Repeatability: ±0.02% of span Turn-Down Ratio: Up to 100:1 Response Time: <100 ms Long-Term Stability: ±0.1% of URL over 10 years Pressure Ratings Differential Pressure Range: Configurable per PRRA7 sensor selection Static Pressure Rating: Up to 105 MPa (high-pressure HRH variant) Proof Pressure: 1.5 × static rating Overpressure Protection: Integrated mechanical system Materials & Construction Wetted Materials: Stainless steel / Hastelloy / optional alloys (per PRRA7 selection) Fill Fluid: Silicone oil or inert fluid Housing: Aluminum or stainless steel (B7TB configuration) Process Connections: High-pressure flanges or threaded adapters Electrical & Communication Power Supply: 10.5–45 VDC Output Signal: 4–20 mA + HART digital Load Resistance (HART): ≤600 Ω Local Configuration: Push-button or LCD interface (if equipped) Environmental Conditions Electronics Operating Temperature: –40 to +85 °C Process Temperature: According to sensor and fill fluid selection Humidity: 0–100% RH, non-condensing Ingress Protection: IP67 / IP68 depending on housing and terminals Vibration Resistance: Up to 10 g, 10–2000 Hz Certifications / Standards Explosion Protection: Ex ia / Ex d / Ex nA (depending on configuration) Compliance: ATEX, IECEx, PED, CE EMC & Surge Protection: Industrial-grade standards