Description

ROSEMOUNT
248 HART
MODEL: 248HAI1N0NSC4Q4
TEMPERATURE TRANSMITTER
P/N: 00248-1401-0001
REV: AB
SENSOR: PT100_385 4 WIRE
RANGE: 0 TO 540 DEG C
SUPPLY: 12-42.4 VDC
OUTPUT: 4-20 MA
POWER: VI=30VDC, LI=130MADC, PI=1.0W, CI=3.6 NF, LI=0
LOOP: VO=45VDC, IO=26MADC, PO=290MW, CI=2.1 NF, LI=0
HW: 4 SW: 521

The Rosemount 248 is a HART-protocol temperature transmitter engineered to deliver accurate, loop-powered temperature measurement across demanding industrial and marine control system environments. Accepting input from a 4-wire PT100 RTD sensor with a measurement range of 0 to 540°C, it converts sensor data into a reliable 4–20mA analogue output suitable for integration with distributed control systems, PLCs, and HART-compatible field communicators. Onboard, precise temperature monitoring is critical for engine room machinery, heat exchangers, cargo systems, and auxiliary plant — making a calibrated, specification-matched transmitter an operationally essential component.

Key Features

✓ HART-enabled 4–20mA output transmitter accepting a 4-wire PT100 (385) RTD input, with a measurement range of 0 to 540°C, suitable for high-temperature process monitoring applications.

✓ Supply voltage range of 12–42.4 VDC provides compatibility with a broad range of marine panel and loop power configurations; intrinsically safe power parameters (VI=30VDC, PI=1.0W) are specified on the nameplate, subject to confirmation of applicable certification documentation.

✓ Compatible with HART field communicators and HART-enabled DCS or PLC systems, enabling remote configuration, diagnostics, and process variable interrogation without loop interruption.

✓ Compact head-mount transmitter format typical of the Rosemount 248 series suits installation within instrument connection heads on pipework, machinery, and process equipment in engine rooms, machinery spaces, and cargo plant areas.

✓ Direct replacement for existing Rosemount 248 installations; hardware revision AB and software version 521 should be confirmed against the installed unit’s nameplate prior to fitment to ensure full compatibility with the host control system.

Marine Applications

✓ Engine room temperature monitoring for main engines, auxiliary engines, turbochargers, lube oil systems, and cooling water circuits where continuous process temperature data is required.

✓ Cargo and cargo heating system temperature measurement on tankers, chemical carriers, and LNG vessels where precise thermal control of cargo is operationally and safety-critical.

✓ Heat exchanger and boiler plant instrumentation on vessels with steam or thermal oil systems, providing accurate temperature feedback to the automation and control system.

✓ Integration into vessel automation and alarm monitoring systems (AMS) and distributed control systems (DCS) on offshore supply vessels, platform supply vessels, and large merchant vessels.

✓ Retrofit and instrument upgrade programmes on vessels transitioning to HART-compatible control infrastructure, where legacy analogue transmitters are being replaced with communicating field devices.

Why Marine Engineers Choose

The Rosemount 248 is a well-established field instrument valued for its robust loop-powered design, HART diagnostics capability, and broad RTD input compatibility. Its defined supply and output parameters simplify loop verification, and its compact form factor suits the constrained installation environments typical of marine instrumentation applications.

Ideal For

Merchant vessels, tankers, chemical carriers, offshore support vessels, platform supply vessels, cruise ships, and any vessel operating automation or control systems requiring HART-compatible RTD temperature transmitters for engine room or process plant monitoring.

Technical Support & Compliance

Technical assistance is available to support troubleshooting, loop verification, configuration via HART communicator, commissioning, and integration with existing control or alarm monitoring systems. Retrofit and upgrade support can be provided subject to confirmation of the host system’s HART revision compatibility and loop parameters. To confirm suitability prior to order, buyers are advised to share nameplate photographs of the installed transmitter, the existing part number and revision, host system model and software version, relevant loop or instrument drawings, and vessel name or IMO number where applicable. Compatibility and direct interchangeability are subject to confirmation based on the information provided.