Specifications General Type: Differential Pressure Transmitter Series: ABB 266 ASTC Output: 4–20 mA, two-wire with HART protocol Technology: Digital capacitive sensor with temperature compensation Measurement Performance Reference Accuracy: ±0.04% of span (depending on calibration) Repeatability: ±0.02% of span Turn-Down Ratio: Up to 100:1 Response Time: Typically <100 ms Long-Term Stability: ±0.1% of span over 10 years Pressure Ratings Differential Pressure Range: Configurable according to selected sensor range Static Pressure Limit: As defined by KBNB1 sensor module Overpressure Protection: Integrated mechanical system Mechanical / Materials Wetted Parts: Stainless steel (per KBNB1 selection) Fill Fluid: Silicone or inert oil (depending on configuration) Housing: Aluminum or stainless steel (per EYL1 selection) Process Connections: Standard 266 manifold or threaded connections Electrical Power Supply: 10.5–45 VDC Load Resistance: Up to 600 Ω (HART) Signal: 4–20 mA with HART digital output Local Configuration: Push-button interface if equipped Environmental Conditions Electronics Temperature Range: –40 to +85 °C Process Temperature: According to fill fluid and sensor selection Humidity: 0–100% RH (non-condensing) Ingress Protection: IP66 / IP67 depending on housing and entry options Vibration Resistance: Up to 10 g, 10–2000 Hz Certifications Explosion Protection: Ex ia / Ex d / Ex nA options depending on code Compliance: ATEX, IECEx, PED, CE Surge / EMC Protection: Per industrial standards