Specifications General Type: Differential Pressure Transmitter Series: ABB 266 GSH Output: 4–20 mA, two-wire with HART communication Sensor Technology: Digital capacitive differential sensor with temperature compensation Measurement Performance Reference Accuracy: ±0.04% of span (depending on calibration and range) Repeatability: ±0.02% of span Turn-Down Ratio: Up to 100:1 Response Time: <100 ms Long-Term Stability: ±0.1% URL over 10 years Pressure Ratings Differential Pressure Range: According to CKBNA1 sensor selection Static Pressure Rating: High static pressure capability (per GSH design) Proof Pressure: 1.5 × static rating Overpressure Protection: Integrated mechanical system Materials & Construction Wetted Parts: Stainless steel / Hastelloy / optional alloys (per CKBNA1) Fill Fluid: Silicone oil or inert fluid Housing: Aluminum or stainless steel (per model configuration) Process Connections: Flanges or threaded high-pressure adapters Electrical & Communication Power Supply: 10.5–45 VDC Signal: 4–20 mA + HART digital Load Resistance (HART): ≤600 Ω Local Configuration: Optional push-button or LCD interface Environmental Conditions Electronics Operating Temperature: –40 to +85 °C Process Temperature: Based on sensor and fill fluid Humidity: 0–100% RH, non-condensing Ingress Protection: IP67 / IP68 depending on housing and electrical entry Vibration Resistance: Up to 10 g, 10–2000 Hz Certifications / Compliance Explosion Protection: Ex ia / Ex d / Ex nA options depending on configuration Compliance: ATEX, IECEx, PED, CE EMC / Surge Protection: Industrial-grade standards