Foxboro 823DP-L3K1NL2-A is a high-accuracy differential pressure (DP) transmitter with 4-20mA + HART output. It features a stainless steel sensor (K1) and conduit electrical connection (NL2). The "L3" designation indicates a specific pressure range (exact value depends on factory configuration). The transmitter offers ±0.1% accuracy, robust performance for industrial applications, and compliance with CE and SIL 2/3 safety standards.