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The Emerson KJ4001X1-NB1 Intelligent Field Transmitter is engineered to provide reliable and highly accurate measurements for pressure, flow, and level in critical industrial processes. Part of the Rosemount™ series, this transmitter is designed for industries such as oil & gas, chemical processing, power generation, and water treatment, where precision, uptime, and regulatory compliance are essential. The KJ4001X1-NB1 features advanced diagnostics, multi-variable measurement capabilities, and multiple communication protocols, including HART®, FOUNDATION™ fieldbus, and Profibus PA, ensuring seamless integration into a variety of control systems. Its durable, rugged design ensures long-term reliability even in the most challenging operating environments.

Technical Specifications

Specification	Details
Model	Emerson KJ4001X1-NB1
Module Type	Intelligent Field Transmitter
Measurement Range	0.01 to 5000 m³/h (Flow), 0–15,000 psi (Pressure), 0–100 meters (Level)
Input Type	Differential Pressure, Flow, Level
Communication Protocol	HART®, FOUNDATION™ fieldbus, Profibus PA
Output Signal	4–20 mA, Digital (HART)
Accuracy	±0.05% of Span
Temperature Range	-40°C to 85°C (-40°F to 185°F)
Power Supply	12–42 VDC
Dimensions	9.0" x 6.7" x 6.5" (229 mm x 170 mm x 165 mm)
Weight	2.50 kg
Housing Material	Stainless Steel
Ingress Protection	IP66/IP67

Recommended Related Models

For applications requiring additional features or different configurations, consider the following Emerson models:

Emerson KJ4002X1-NB1 – An upgraded version of the KJ4001X1-NB1 offering more advanced diagnostics and enhanced multi-variable measurement capabilities.
Emerson Rosemount 3051 – A popular choice for multi-variable measurement, perfect for pressure, flow, and temperature measurements across a range of industrial sectors.
Emerson Rosemount 8700 – Ideal for non-intrusive flow measurement, this magnetic flow meter is used extensively in industries such as chemical processing and water treatment.

Popular Emerson Models

Emerson’s Rosemount™ series continues to lead in the industrial measurement space. Some of the most popular models include:

Emerson Rosemount 3051 – A versatile multi-variable transmitter that provides precise pressure, flow, and temperature measurement in various industries.
Emerson Rosemount 2088 – A highly reliable and cost-effective transmitter for general-purpose applications, delivering precise pressure and flow measurement.
Emerson 1151 – A rugged and dependable transmitter used for pressure, level, and temperature measurement in numerous industrial environments.

Applications

The Emerson KJ4001X1-NB1 is suitable for various applications across industries where accuracy and reliability are critical:

Oil & Gas: Essential for monitoring pressure, flow, and level in pipelines, drilling operations, and refining processes, ensuring operational safety and efficiency.
Chemical Processing: Used for accurate measurement in reactors, distillation columns, and other process vessels, helping maintain optimal product quality and process control.
Power Generation: Provides precise monitoring of flow and pressure in turbines, boilers, and cooling systems, helping to maximize energy efficiency and minimize downtime.
Water & Wastewater Treatment: Ensures accurate level and flow measurements in treatment plants, helping to maintain water quality and compliance with environmental regulations.
Food & Beverage: Supports process control in production lines, ensuring accurate flow and level measurement to maintain product consistency and regulatory compliance.

Advantages

Multi-Variable Measurement: The KJ4001X1-NB1 offers simultaneous measurement of pressure, flow, and level, providing an all-in-one solution for complex process control.
High Accuracy: With ±0.05% of span accuracy, this transmitter delivers precise and reliable data, ensuring optimal performance in critical industrial processes.
Advanced Diagnostics: The transmitter is equipped with Emerson Smart Diagnostics, offering real-time diagnostic data, predictive maintenance alerts, and reduced downtime.
Durability: With IP66/IP67 ingress protection and a stainless-steel housing, the KJ4001X1-NB1 is designed for reliability in the harshest environments, including hazardous areas.
Wide Temperature Range: The KJ4001X1-NB1 operates in extreme conditions, with a temperature range from -40°C to 85°C (-40°F to 185°F), making it versatile for various industrial applications.
Seamless Integration: The device supports HART®, FOUNDATION™ fieldbus, and Profibus PA protocols, providing flexible integration into a wide range of industrial control systems.

Technical FAQs

What is the measurement range of the KJ4001X1-NB1?
The KJ4001X1-NB1 measures flow from 0.01 to 5000 m³/h, pressure up to 15,000 psi, and level from 0 to 100 meters.
What communication protocols does the KJ4001X1-NB1 support?
The KJ4001X1-NB1 supports HART®, FOUNDATION™ fieldbus, and Profibus PA, making it compatible with a wide range of modern control systems.
What is the accuracy of the KJ4001X1-NB1?
The KJ4001X1-NB1 has an accuracy of ±0.05% of span, ensuring precise and reliable measurements for critical applications.
What is the operating temperature range of the KJ4001X1-NB1?
The KJ4001X1-NB1 operates within a temperature range of -40°C to 85°C (-40°F to 185°F), suitable for various industrial environments, including extreme conditions.
What power supply does the KJ4001X1-NB1 require?
The transmitter operates on a 12–42 VDC power supply, providing flexibility for use in a variety of industrial control systems.
Is the KJ4001X1-NB1 suitable for hazardous environments?
Yes, with IP66/IP67 ingress protection and a stainless-steel housing, the KJ4001X1-NB1 is built for use in harsh and hazardous environments.
How is the KJ4001X1-NB1 mounted?
The KJ4001X1-NB1 can be mounted using pipe-mounting or panel-mounting, offering flexibility for different installation needs.
Does the KJ4001X1-NB1 support multi-variable measurement?
Yes, the KJ4001X1-NB1 can simultaneously measure pressure, flow, and level, providing a comprehensive solution for complex process control applications.
Which industries use the KJ4001X1-NB1?
The KJ4001X1-NB1 is widely used in oil & gas, chemical processing, power generation, water treatment, and food & beverage industries, where precise and reliable measurement is crucial for process control.
What is the weight of the KJ4001X1-NB1?
The KJ4001X1-NB1 weighs approximately 2.50 kg (5.5 lbs), making it easy to handle and install in various industrial applications.