The Rosemount 3144P is the higher-feature field-mount temperature transmitter in Emerson's line: dual-sensor capability, Hot Backup, sensor drift detection, the dual-input math modes, X-well surface measurement, and tighter accuracy options. The model code has three required positions and a rich option set. This guide explains how to read it with the Rosemount 3144P Decoder, anchored to Emerson PDS 00813-0100-4021 Rev TG (February 2025).
Housing, Output, Measurement Configuration
The 3144P has three required positions after the prefix. The housing style is a two-character code (D1 through D9, and D0): a field-mount dual-compartment housing in aluminum, stainless steel, or ultra-low-copper aluminum, with a specific conduit entry (NPT, M20, PG13.5, or JIS). The output is HART (A) or FOUNDATION Fieldbus (F). The measurement configuration is single sensor (1) or dual sensor (2).
The decoder reads all three, then matches the option string. The PDS even gives a worked example, 3144P D1 A 1 NA M5 PT C1 HR7 XA, which the decoder reproduces exactly as a golden-path test.
Rosemount 3144P Temperature Transmitter Decoder
Decode a Rosemount 3144P temperature transmitter model code against Emerson PDS 00813-0100-4021 Rev TG. Reads housing style, output, single/dual measurement configuration, and the full option string (Hot Backup, X-well, diagnostics, dual-input modes). Enforces dual-sensor requirements and HART-vs-Fieldbus feature gating. Source-cited every position.
Dual Sensor Gates the Feature Set
The measurement-configuration character is more consequential than its single digit suggests. The dual-input configurations all require dual sensor (configuration 2): Hot Backup (U1), sensor drift alert in warning or alarm mode (U2/U3), differential temperature (U5), average temperature (U6), first-good temperature (U7), and two independent sensors (U4).
On a single-sensor build (configuration 1), none of the U options are buildable. If any dual-sensor strategy is in play, choose configuration 2 up front. The decoder flags any U option that appears on a single-sensor configuration.
What X-well Is and Is Not For
X-well (option PT) measures process temperature from the pipe surface using a factory-assembled Rosemount 0085 pipe-clamp sensor, with no thermowell cut into the line. That is genuinely useful where installing a thermowell is impractical or expensive. But Emerson is explicit about its limits: X-well is for temperature monitoring only, not control or safety; it is not available with FOUNDATION Fieldbus; and it only works with the factory-supplied silver-tipped sensor.
The decoder fires a constraint warning if X-well appears on a Fieldbus build, and surfaces the monitoring-only note on every X-well decode, so it does not quietly end up in a control or safety-instrumented loop where its accuracy and response time are not specified for the job.
HART Versus Fieldbus Splits the Option List
Choosing FOUNDATION Fieldbus output (F) removes the HART-only feature set: X-well (PT), HART diagnostics (DA1), software configuration (C1), NAMUR alarm levels (A1/CN), custody transfer (D3/D4), the warning and alarm drift modes (U2/U3), and HART safety certifications (QS/QT). Conversely, the FF control (A01) and FF diagnostics (D01) options require Fieldbus output.
Decide HART versus Fieldbus before walking the option list, because the available options genuinely differ. The decoder flags Fieldbus-only options on a HART build and HART-only options on a Fieldbus build. As with the 644, the sensor type, range, and span are configured separately, not encoded in the model code.