Model Number 871A-1F Product Line Foxboro 800 Series Instrument Type Differential Pressure (DP) Transmitter Output Signal 2-Wire, 4-20 mA DC, HART® protocol enabled (for digital communication). Power Supply Typically 12-45 VDC (loop powered). Performance Accuracy High accuracy, typically ±0.25% of span (including linearity, hysteresis, and repeatability). Turndown Ratio High turndown (e.g., 10:1), allowing for wide rangeability. Response Time User-adjustable damping. Pressure Ratings Line Pressure Specific maximum static pressure rating (e.g., 3600 psi / 248 bar) depending on the "1F" flange rating. Overpressure Protection Capable of withstanding high overpressures without damage. Materials of Construction Wetted Parts The "1F" code specifies materials. Common options include 316 Stainless Steel for isolating diaphragms and Hastelloy C-276 for corrosive services. Electrical Connection Likely ½” NPT conduit connection. Process Connections Typically ¼” NPT or ½” NPT female ports on the high and low pressure sides. Environmental Operating Temperature -40°F to +185°F (-40°C to +85°C) for the electronics. Wider range for the sensor. Ambient Temperature Effect Minimal span and zero shift per degree temperature change. Humidity 0-100% RH (non-condensing). Enclosure Rating NEMA 4X (weatherproof and corrosion-resistant).
