Parameters Category Parameter Specification / Interpretation for 266DSHESSA1B1 General Model Series 2600T Series (DST - Differential Pressure Transmitter) Type Smart 4-20 mA/HART Differential Pressure Transmitter Output Signal 4-20 mA DC, two-wire, with HART digital overlay. Measurement Performance Measured Variable Differential Pressure (dP) Span Limits Specific range defined by suffix. Common spans from 0.1 kPa (1 mbar) to several MPa. "ESA1" likely indicates a specific calibrated span (e.g., 0-40 kPa). Reference Accuracy ±0.065% of calibrated span (Typical for high-end 2600T). Long-Term Stability ±0.1% of URL per year (Typical). Turndown Ratio Up to 100:1 (Software configurable). Electrical Supply Voltage 10.5 to 45 V DC (Standard for two-wire loop). Load Limit R_L ≤ (Vs - 10.5V) / 0.022 A Communication HART Protocol (Bell 202 FSK). Process Connections & Materials Wetted Parts Isolating Diaphragms: 316L SST Process Flanges/Fittings: 316 SST Fill Fluid Silicone oil (standard) or Inert Fluorocarbon (for aggressive media/O2 service). Pressure Ports 1/4" NPT female or G1/2" (Common). Static Pressure Limit Up to 16 MPa (2320 psi) (Flange dependent). Overpressure Limit Up to full static pressure rating without damage. Mechanical & Environmental Housing Material Stainless Steel or Epoxy-coated Aluminum. Protection Degree IP66 / IP67 / NEMA 4X Display (Option) Local LCD indicator (Optional, not all "B1" have it). Process Temperature Limits -40°C to +120°C (Standard fill fluid). Ambient Temperature Limits -40°C to +85°C Certifications Explosion Protection ATEX / IECEx: Ex ia IIC T4/T6 Ga (Intrinsic Safety) & Ex d IIC T4/T6 Gb (Flameproof) options. Other CE, SIL 2/3 capable.