Factory Original Rosemounte Temperature Transmitter 248 Hart 4-20mA Temperature Module

• Customization: Available
• Type: Network Type
• Measuring Medium: Temperature
• Model NO.: Rosemount 248
• Display Type: LCD
• Site Display: Site Display
• Accuracy: ±0.1% of Span (Rtd)
• IP Rating: IP67
• Certification: CE
• Customized: Customized
• Product Name: Rosemount 248 Temperature Module
• Measurement Type: Head-Mounted or Field-Mounted Transmitter
• Input Sensor Types: Rtd (PT100, PT1000), Thermocouple
• Output Signal: 10.5–42 V DC (Loop-Powered), 18–30 V D
• Power Supply: 10.5–42 V DC (Loop-Powered)
• Local Display Module: ±0.1% of Span (Rtd), ±1.5°f
• Temperature Range: -200°c to 850°c
• Communication Protocol: Hart® 7 (Digital Overlay on 4–20 Ma Sign
• Certifications: ATEX, Iecex, FM, CSA, Sil 2 (Optional), Namur Ne43
• Process Connection: Threaded, Gland or Direct Mount
• Environmental Rating: IP66/IP67, NEMA 4X
• Operating Temperature: -40°c to +85°c
• Material: Housing: Aluminum or Stainless Steel; Sensor
• Mounting Options: Field-Mount (Local Display)
• Signal Update Rate: 2 Hz (Standard), Adjustable up to 10 Hz
• Transport Package: Support Air/Land/Sea Transportation
• Specification: 40cm*30cm*30cm*
• Trademark: Emerson
• Origin: China
• HS Code: 8477900000
• Production Capacity: 1000
• Package Size: 15.00cm * 15.00cm * 15.00cm
• Package Gross Weight: 0.300kg

Product Description

Products Picture

Specification

Rosemounte Temperature Transmitter 248 Hart 4-20mA Temperature Module
Parameter	Specification
Model	Rosemount 248 Temperature Module
Type	Head-mounted or Field-mounted Temperature Transmitter
Input Sensor Types	RTD (Pt100, Pt1000), Thermocouple (Types J, K, T, E, N, R, S, B)
Output Signal	4–20 mA DC (Analog), HART® 7 Protocol
Power Supply	10.5–42 V DC (Loop-Powered), 18–30 V DC (for HART communication)
Accuracy	±0.1% of span (RTD), ±1.5°F (±0.8°C) for thermocouples
Temperature Range	-200°C to 850°C (-328°F to 1562°F) depending on sensor type
Communication Protocol	HART® 7 (Digital overlay on 4–20 mA signal)
Certifications	ATEX, IECEx, FM, CSA, SIL 2 (optional), NAMUR NE43
Process Connection	Threaded (e.g., ½–14 NPT, M20x1.5), Gland or Direct Mount
Environmental Rating	IP66/IP67, NEMA 4X (Explosion-proof optional)
Operating Temperature	-40°C to +85°C (-40°F to 185°F)
Storage Temperature	-40°C to +85°C (-40°F to 185°F)
Material	Housing: Aluminum or Stainless Steel; Sensor: Various (per application)
Mounting Options	Field-mount (local display), Head-mount (with thermowell)
Display	Optional Local LCD Display (Rotatable for readability)
Signal Update Rate	2 Hz (Standard), Adjustable up to 10 Hz

Product Description

Rosemount 248 Temperature Module

The Emerson Rosemount 248 HART 4–20 mA Temperature Transmitter Module is a compact, high-precision industrial device engineered to convert temperature measurements from sensors into standardized analog and digital signals for process monitoring and control. Designed for reliability, simplicity, and seamless integration, the 248 module serves as a critical component in diverse applications across industries such as oil and gas, chemical processing, power generation, and food and beverage. Its combination of advanced sensor compatibility, HART communication, and robust construction ensures accurate temperature data acquisition while minimizing maintenance efforts and operational downtime.

At its core, the Rosemount 248 module functions as a two-wire temperature transmitter, converting signals from resistance temperature detectors (RTDs), thermocouples, or resistive sensors into a 4–20 mA analog output proportional to the measured temperature. This analog signal is widely used in industrial control systems for real-time monitoring and regulation. Additionally, the module supports HART® (Highway Addressable Remote Transducer) Protocol version 7, enabling bidirectional digital communication over the same pair of wires. This allows operators to remotely configure, calibrate, and diagnose the device without interrupting the analog signal, streamlining maintenance and enhancing process efficiency.

The module's design emphasizes versatility and ease of use. Housed in a rugged aluminum or stainless steel enclosure with an IP66/NEMA 4X rating, the 248 withstands harsh environmental conditions, including extreme temperatures (-40°C to +85°C), humidity, and vibration. Its compact size and modular architecture enable installation in tight spaces, such as control panels, thermowells, or hazardous area junction boxes. The device supports a wide range of temperature sensors, including Pt100 RTDs, thermocouples (Types J, K, T, E, N, R, S, B, C, or D), and resistance thermometers, with automatic sensor detection and linearization to ensure measurement accuracy. Optional configurations include dual-sensor input for redundancy or averaging, ideal for critical processes requiring compliance with ASME B40.7 standards.

One of the key advantages of the Rosemount 248 is its user-friendly setup and diagnostics. A large, backlit LCD display provides real-time visibility of process variables, including temperature readings, device status, and diagnostic messages in multiple languages. Configuration is simplified via an intuitive local interface with a three-button keypad, allowing adjustments to parameters such as measurement units, damping settings, and alarm thresholds. For remote access, the HART protocol enables integration with asset management systems like Emerson's AMS Suite, which centralizes device configuration, trend analysis, and predictive maintenance alerts. This reduces manual intervention, lowers calibration costs, and ensures compliance with quality and safety standards.

Safety and compliance are integral to the module's design. It meets global certifications such as ATEX, IECEx, FM, and CSA for use in hazardous environments (Zone 1/2 or Div. 1/2), ensuring safe operation in explosive atmospheres. The device also adheres to functional safety standards (SIL 2 per IEC 61508) for applications requiring fail-safe performance, such as reactor temperature controls or emergency shutdown systems. Its electromagnetic compatibility (EMC) guarantees stable operation in electrically noisy environments, while built-in overvoltage protection safeguards against electrical surges common in industrial settings.

The 248 module excels in adaptability, supporting both head-mounted and rail-mounted installations. In head-mounted configurations, it is directly mounted into a thermowell or temperature probe, minimizing wiring complexity and signal interference. For rail-mounted setups, the module integrates into control cabinets alongside other process instrumentation, offering flexibility for system upgrades or expansions. Its low power consumption aligns with energy-efficient operations, reducing reliance on external power supplies and lowering operational costs.

Common applications for the Rosemount 248 span critical industrial processes. In oil and gas facilities, it monitors pipeline temperatures to prevent thermal stress or leaks. In chemical reactors, it ensures precise temperature control to maintain reaction stability and product consistency.

Company Profile

Company Profile

KeRul (WeiFang) Automation Equipment Co., Ltd. is speciallzed in industrialautomation instrument development, production and sales, technical servicesand supporting equipment supply of specialized companies, The mainproducts are fow meters, level meters, temperature meters, pressuremeters, electrical meters, thermal meters, programmable controller(PLC), Dcs distributed control system, eight series of more than 1,000specifcations. its products and technologies are widely used in electrlcpower, metallurgy, petrochemical, environ. mental protection, plastics,food,l printing, tobacco, textile, dyeing and other fields.

Our Service

OEM / ODM services
To meet the user diversified requirement, Holykell have established a set of customer service and technical support system with OEM / ODM order as the center, and responded and Handle the customer's requirements in a timely manner to ensure accurate delivery time and product quality.
Order services
Fastest reply:Professional sales engineers 7/24 online services
Payment terms:T/T ,Western union, Paypal, Credit Card, L/C others
Fast delivery: within 24 hours release the cargo (normal spec.), Customized 7-12 days after payment .
 
MAINTENANCE & AFTER-SALES SERVICES
Customer Feedback:  Sales engineers and technical engineers will be one-on-one service for you to exclude all obstacles when use our sensors.
Warranty period: 12 months
Product life-long maintenance: Holykell can provide you with the maintenance of the whole life of the sensors

Packaging & Shipping

FAQ

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