Description
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I.Meta Description
Original Emerson Rosemount 248R rail temperature transmitter with HART 7 protocol, universal RTD/TC/mV input, DIN rail mounting, NAMUR NE43 NE107 compliant, ATEX IECEx intrinsically safe, replacement for 644 rail transmitter, full stock ready to ship worldwide.
II.Product Overview
Rosemount™ 248R Rail Mount Smart Temperature Transmitter
The Rosemount 248R is Emerson's industry-standard DIN rail mounted single-channel temperature transmitter, designed for cabinet installation, replacing head-mount 248H and 644 rail transmitters for compact PLC cabinet temperature monitoring. Equipped with HART 7 two-way digital communication and 4-20mA analog output, 248R accepts all universal sensor inputs including 2/3/4 wire RTD, thermocouple, mV, ohm resistance signals.
RK enhanced version (248RANARK) features 23.5mm ultra-slim housing, LED diagnostic indicator, QR asset tag, ambient temperature compensation, CVD sensor matching, full NAMUR NE21 NE43 NE44 NE107 compliance, open/short circuit sensor diagnostics. Ideal for oil & gas, power plant, chemical, water treatment, pulp & paper, HVAC industrial process temperature measurement.
Core selling point：Direct sensor wiring to DCS causes signal drift & noise; 248R eliminates long cable error, cuts total installation cost by 30%, improves long-term stability with 1-year drift guarantee.
III. Key Advantages
✅ Genuine Emerson Rosemount original new, factory serial number, full datasheet & calibration certificate available
✅ DIN 35mm standard rail mount, slim 23.5mm thickness, high density cabinet layout
✅ HART 7 protocol, compatible with 475, Trex communicator, AMS device manager
✅ Universal multi-input: Pt100 Pt1000, J/K/T/E/R/S/N/B TC, mV, ohm signal
✅ CVD Callendar-Van Dusen sensor matching option for ultra-high accuracy (C2 code)
✅ NAMUR NE43 fault alarm (3.6mA low / 21mA high), NE107 diagnostic standard
✅ Built-in sensor break/short circuit detection, reduce unplanned downtime
✅ Full isolation 500Vac, anti-interference for heavy industrial environment
✅ Ambient temperature compensation, stable reading from -40°C ~ +85°C ambient
✅ ATEX IECEx FM CSA intrinsic safety certification, SIL2 optional
✅ RoHS compliant, CE marked, global industrial approval
IV. Full Technical Specifications
Electrical
• Output: 4-20mA + HART 7 digital two-way communication
• Update rate: 0.5s minimum, default 5s damping adjustable
• Basic accuracy: ±0.1% of span or 0.2°C maximum
• Long term stability: ≤0.05% span per year
• Input isolation: 500Vac rms full galvanic isolation
• Loop power: 11~42VDC two-wire loop powered
• Sensor input: Universal single channel (RTD / TC / mV / resistance)
Mechanical & Environment
• Mount: Standard 35mm DIN rail
• Dimension: 23.5mm(W) × 112mm(H) × 115mm(D)
• Housing: Flame retardant ABS industrial grade
• Operating ambient: -40°C ~ +85°C
• Storage temperature: -50°C ~ +100°C
• Ingress protection: IP30 cabinet grade
• Compliance: NAMUR NE21 NE43 NE44 NE89 NE107
V. Application Industries
Power generation, refinery & petrochemical, natural gas pipeline, boiler control, pharmaceutical, food sanitary process, wastewater treatment, cement plant, steel mill, HVAC building automation, compressor station, offshore skid package, OEM control cabinet integration, EPC project bulk order.
VI. Why Choose Our Original Rosemount 248R?
We supply 100% brand new original Emerson Rosemount 248R, factory sealed, with unique serial number on body, factory test report, calibration certificate, official datasheet. No refurbished, no copy clone items.
We hold regular stock for 248RANA / 248RANARK enhanced RK version, fast dispatch within 24 hours, worldwide shipping DHL/FedEx/UPS.
Bulk EPC project order with discounted price, full certification package for customs clearance and site inspection.
Compatible with Trex handheld communicator, 475 Hart communicator, AMS, Rosemount asset management software.
VII. FAQ
Q1: What is difference between 248R standard and RK (248RANARK) version?
A: RK upgrade version has thinner 23.5mm housing, front LED health indicator, QR asset tag for digital documentation, improved EMC anti-interference, NE107 full diagnostic, zero extra cost. RK is the latest Emerson revision, recommended for all new projects.
Q2: Can 248R replace Rosemount 644 DIN rail transmitter?
A: Yes, fully pin-to-pin compatible, same HART protocol, same input function, lower cost than 644 rail model, the most popular cabinet temperature transmitter after 644 discontinued.
Q3: Does 248R support Pt100 4-wire input?
A: Yes, universal input supports 2/3/4 wire RTD, all thermocouple types, mV and ohm passive signal, no need extra card.
Q4: Can I configure 248R via Trex communicator?
A: 100% compatible with Emerson Trex, 475 HART communicator, AMS software, easy remote parameter setting.
Q5: What certifications are available for hazardous area?
A: ATEX IECEx FM CSA intrinsic safety (I1 I5 I6 I7 code), SIL2 optional for safety instrumented system.
Q6: Is this clone or genuine original Rosemount?
A: All units are factory original Emerson Rosemount new stock, we do not supply aftermarket copies. Serial number can be verified on Emerson official system.
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