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The ABB 266HDHH (RMB1 configuration) is a high-performance differential pressure transmitter from ABB’s 266 Series, designed for precise measurement in demanding industrial applications. It combines ABB’s digital capacitive sensor technology with robust electronics to deliver high accuracy, fast response, and long-term stability under harsh conditions.
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Specifications General Type: Differential Pressure Transmitter Series: ABB 266 HDHH (High Differential / High Static Pressure) 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 RMB1 sensor selection Static Pressure Rating: High static pressure variant, suitable for up to 105 MPa Proof Pressure: 1.5 × static rating Overpressure Protection: Integrated mechanical system Materials & Construction Wetted Materials: Stainless steel / Hastelloy / optional alloys (per RMB1 selection) Fill Fluid: Silicone or inert fluid Housing: Aluminum or stainless steel (per 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: Optional push-button or LCD interface Environmental Conditions Electronics Operating Temperature: –40 to +85 °C Process Temperature: According to sensor and fill fluid 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
