Product Summary

The NOIKE-AH  Temperature Sensor NM140（Temperature Transmitter） is an industrial-grade temperature measurement solution designed for accurate and stable temperature monitoring across a wide range of industrial applications. Compatible with PT100 RTDs and thermocouple sensors, the NM140 converts temperature signals into a standard 4–20 mA analog output, with an optional HART communication protocol for advanced process control.

Its robust die-cast aluminum housing, rotatable electronic head, and multiple process connection options make it suitable for harsh industrial environments. With a user-configurable measurement range from -200°C to +1800°C, the NM140 easily integrates into PLC, DCS, and SCADA systems for continuous temperature monitoring.

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Working Principle

The NM140 operates by receiving signals from a PT100 resistance temperature detector (RTD) or thermocouple sensor.

The internal electronic circuit amplifies, linearizes, and digitally compensates the sensor signal before converting it into a standard 4–20 mA two-wire output. Optional HART communication enables remote configuration, diagnostics, and monitoring while maintaining compatibility with conventional analog control systems.

The rotatable transmitter head allows flexible cable routing during installation.

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Key Features

• Compatible with PT100 RTD and thermocouple sensors
• User-configurable measuring range from -200°C to +1800°C
• Standard 4–20 mA two-wire output
• Optional HART communication
• High measurement accuracy and excellent linearity
• Optional 4-digit LED or LCD display
• Rotatable electronic head for flexible installation
• Rugged die-cast aluminum housing
• 316 stainless steel wetted parts
• IP65 protection rating
• Multiple process connection options
• Suitable for industrial automation systems

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Technical Specifications

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Typical Application Cases

Circulating Water & Cooling Systems

Monitors cooling water temperature in industrial cooling systems, heat exchangers, and circulating water pipelines to maintain stable process conditions.

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Oil & Gas Industry

Measures process temperatures in pipelines, storage tanks, heat exchangers, and production equipment to improve operational safety and efficiency.

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Steel & Metallurgy

Suitable for furnaces, heat treatment equipment, molten metal processing, and high-temperature production lines requiring accurate temperature monitoring.

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Water & Wastewater Treatment

Monitors water temperature in treatment plants, pumping stations, filtration systems, and chemical dosing processes.

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Machinery Manufacturing

Provides temperature monitoring for hydraulic systems, lubrication systems, compressors, bearings, and industrial machinery to support preventive maintenance.

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Glass Manufacturing

Measures furnace and process temperatures in glass production where stable temperature control is essential for product quality.

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Installation Guidelines

• Select a PT100 or thermocouple sensor suitable for the application.
• Configure the required measuring range before commissioning.
• Mount the transmitter securely and adjust the rotatable head for convenient cable routing.
• Follow the terminal wiring diagram for correct electrical connections.
• Avoid installation in areas with excessive vibration or strong electromagnetic interference.

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Frequently Asked Questions (FAQ)

What sensors are compatible with the NM140?

The NM140 supports PT100 Class A RTDs, optional PT1000, and thermocouple sensors.

What output signal does the transmitter provide?

The standard output is a 4–20 mA two-wire analog signal, with optional HART communication.

What is the maximum measuring range?

The measurement range can be configured anywhere between -200°C and +1800°C, depending on the selected sensor.

Can the NM140 be integrated with PLC or DCS systems?

Yes. The 4–20 mA output and optional HART protocol make it compatible with PLC, DCS, SCADA, and other industrial automation systems.

Is a display available?

Yes. An optional 4-digit LED or LCD display is available for local temperature indication.

Which industries commonly use the NM140?

The NM140 is widely used in oil & gas, chemical processing, water treatment, metallurgy, machinery manufacturing, glass production, power generation, and industrial automation.

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Selection Table

Model/Code	Detailed Description
NM140-	NM140 temperature sensor
NM141-	NM141 temperature sensor
NM142-	NM142 temperature sensor
C2080	Measurement range: -20…80°C
C0100	Measurement range: 0…100°C
C20100	Measurement range: -20…100°C (with pulse)
C20150	Measurement range: -20…150°C (with pulse)
C20250	Measurement range: -20…250°C (with pulse)
C50100	Measurement range: -50…100°C (with pulse)
C50250	Measurement range: -50…250°C (with pulse)
PT100	3-wire PT100
PT1000	3-wire PT1000
K	K-type thermocouple
S	S-type thermocouple
J (NM140 Series)	J-type thermocouple
–	Linear signal
A	4..20mA
AH	4..20mA + HART output
G12M	G1/2 external thread
G01M	G1 external thread
N12M	1/2’NPT external thread
NO1M	1’NPT external thread
M27M	M27*2 external thread
0	No neck tube, not required for temperatures ≤100°C
50	Neck tube length L1: 50=50mm (0≤L1≤500mm)
100	Probe length L2: 100=100mm (25≤L2≤2500mm)
D06	Probe diameter: D06=6mm (length L≤1000mm)
D08	D08=8mm
D12	D12=12mm
D15	D15=15mm

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About NOIKE-AH

NOIKE-AH is a professional manufacturer of industrial instrumentation, providing reliable solutions for flow, pressure, temperature, level, and process measurement. Our products are widely used in industrial automation, energy, chemical processing, water treatment, food & beverage, pharmaceuticals, and manufacturing industries worldwide.