Parameters Category Parameter Specification / Interpretation for 266DSH BSHA1B2L1TB General Model Series 2600T Series (DST - Differential Pressure Smart Transmitter) Type Smart dP Transmitter with Local Operator Interface Output 4-20 mA DC, Two-wire, HART Protocol. Measurement Performance Measured Variable Differential Pressure (dP) Calibrated Span (BSHA1) Defined by core code. Example: 0 to 40 kPa (0.4 bar). Must be verified from official datasheet. Reference Accuracy ±0.075% of calibrated span (Typical). Long-Term Stability ±0.1% of URL per year. Turndown Ratio Up to 100:1 (Software configurable). User Interface Local Display (L1) Backlit LCD. Local Controls Push Buttons (for configuration and navigation). Electrical Supply Voltage 10.5 to 45 V DC (Two-wire). Load Limit R_L ≤ (Vs - 10.5V) / 0.022 A (Ω). Communication HART Protocol (Bell 202 FSK). Process Connections & Materials Wetted Parts (BSH) Isolating Diaphragms & Process Connections: 316L Stainless Steel (Standard). Fill Fluid Silicone Oil (Standard) or Inert Fluorocarbon (for O2/aggressive service). Pressure Ports 1/4" NPT or G1/2" female (Common). Static Pressure Rating Up to 16 MPa (2320 psi). Mechanical & Environmental Housing Stainless Steel, Flameproof (Ex d) enclosure. Protection Degree IP66 / IP67 / NEMA 4X. Process Temperature -40°C to +120°C (Standard fill fluid). Ambient Temperature -40°C to +85°C. Certifications & Safety Explosion Protection (TB) ATEX / IECEx: Ex d IIC T4/T6 Gb (Flameproof) & Ex ia IIC T4/T6 Ga (Intrinsic Safety) - Dual Certification. Functional Safety SIL 2/3 capable.