Product Overview

The Explosion-Proof Digital Temperature Sensor NT50EX-20 Series is an intelligent industrial temperature measurement device designed for hazardous environments requiring reliable temperature monitoring and control. The sensor utilizes ceramic thick-film sensing technology, and the measured signal is processed through an internal circuit before being converted into a standard industrial output signal with simultaneous local digital display.

Designed with an EX dIICT4 explosion-proof housing, the NT50EX-20 is suitable for industrial applications where explosion protection is required. A high-brightness 4-digit LED display provides clear local temperature indication, while the 330° rotatable display head allows operators to obtain the best viewing angle after installation.

The dual-button menu simplifies parameter configuration, and multiple electrical output options—including configurable switch outputs and analog outputs—allow easy integration with PLC, DCS, SCADA, and industrial automation systems.

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Product Features

• Ceramic thick-film temperature sensing technology
• Explosion-proof housing (EX dIICT4)
• High-brightness 4-digit LED display
• 330° rotatable display head
• Dual-button menu for convenient parameter setting
• Configurable push-pull switch outputs
• Compatible with both PNP and NPN outputs
• Configurable normally open (NO) or normally closed (NC) switching logic
• Optional analog outputs:
  • 0–20 mA / 4–20 mA
  • 0–10 V / 1–10 V
• Reverse polarity, overload, and short-circuit protection
• Multiple connection methods
• Suitable for industrial hazardous areas

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Applications

Industries

• Oil & Gas
• Petrochemical
• Natural Gas
• Electric Power
• Metallurgy
• Machinery Manufacturing
• Chemical Processing
• Environmental Protection

Typical Applications

• Explosion-proof process temperature monitoring
• Industrial equipment temperature measurement
• Pipeline temperature monitoring
• Tank temperature monitoring
• Process automation systems
• Industrial safety monitoring

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Technical Specifications

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Available Configurations

Switch Outputs

• Push-pull Output
• PNP Compatible
• NPN Compatible
• Normally Open (NO)
• Normally Closed (NC)

Analog Outputs

• 0–20 mA
• 4–20 mA
• 0–10 V
• 1–10 V

Display

• High-brightness 4-digit LED
• 330° Rotatable Display Head

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Why Choose the Explosion-Proof Digital Temperature Sensor NT50EX-20 Series?

Industrial processes in hazardous environments require accurate temperature measurement together with dependable explosion protection. The NT50EX-20 combines intelligent digital display, configurable switching functions, and multiple analog output options in a compact explosion-proof design.

Designed for Hazardous Areas

The EX dIICT4 explosion-proof housing makes the NT50EX-20 suitable for industrial applications requiring explosion protection while providing local temperature monitoring.

Flexible Output Options

Users can configure PNP/NPN compatible switch outputs as well as current or voltage analog outputs, allowing easy integration into different automation systems.

Easy Operation

The dual-button menu and high-brightness LED display simplify parameter configuration and on-site monitoring. The 330° rotating display head improves visibility regardless of installation direction.

Reliable Industrial Performance

Reverse polarity, overload, and short-circuit protection help improve system reliability, while the 316L stainless steel measuring components provide durability for industrial process applications.

Fast Temperature Monitoring

A response time of less than 10 ms enables rapid temperature signal feedback for monitoring and control applications.

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Application Case

Explosion-Proof Temperature Monitoring for Industrial Process Pipelines

In petrochemical plants and industrial process systems, temperature measurement equipment is often installed in hazardous areas where explosion protection is required. Explosion-Proof Digital Temperature Sensor NT50EX-20 Series can be mounted directly on pipelines or process equipment to continuously monitor process temperature.

The measured temperature is displayed locally on the high-brightness LED screen while simultaneously transmitted through configurable switch outputs and analog signals to PLC, DCS, or industrial control systems. The configurable switching outputs can be used for temperature alarm or control logic, while analog outputs provide continuous process monitoring.

With its explosion-proof housing, rotatable display, and multiple output options, the NT50EX-20 is suitable for temperature monitoring in oil and gas processing, petrochemical facilities, machinery manufacturing, power generation, and other industrial applications requiring reliable operation in hazardous environments.

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Installation Notes

• Use the specified 12–30 VDC power supply.
• Select the required output mode before commissioning.
• Configure the switch logic (NO/NC) according to application requirements.
• Install the sensor in accordance with applicable explosion-proof installation standards.
• Complete wiring according to the selected PNP, NPN, or analog output wiring diagram.
• Rotate the display head as required to achieve the optimal viewing angle after installation.

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Frequently Asked Questions (FAQ)

1. What is the measuring range of the NT50EX-20?

The measuring range is -50°C to 200°C.

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2. What explosion-proof rating does the sensor have?

The NT50EX-20 is rated EX dIICT4.

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3. What output signals are available?

Available outputs include:

• Push-pull switch output
• PNP compatible output
• NPN compatible output
• 0–20 mA
• 4–20 mA
• 0–10 V
• 1–10 V

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4. Does the sensor provide local temperature display?

Yes. It features a high-brightness 4-digit LED display with a 330° rotatable display head.

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5. Can the switching logic be configured?

Yes. The switch outputs can be configured as Normally Open (NO) or Normally Closed (NC).

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6. What materials are used?

• Housing: Cast Aluminum
• Gauge Housing: Engineering Plastic
• Wetted Parts: 316L Stainless Steel / Ceramic

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7. What electrical protection functions are included?

The NT50EX-20 includes:

• Reverse polarity protection
• Overload protection
• Short-circuit protection

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8. Which industries is the NT50EX-20 suitable for?

It is suitable for oil & gas, petrochemical, natural gas, electric power, metallurgy, machinery manufacturing, chemical processing, and other industrial applications requiring explosion-proof temperature monitoring.

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Optional Services

• Customized process connections
• Output configuration support
• Installation and commissioning assistance
• Product customization based on application requirements
• Technical support for industrial automation integration

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Industries Served

The NT50EX-20 Series is suitable for a broad range of industrial sectors, including:

• Petroleum and Petrochemical
• Oil & Gas
• Natural Gas
• Electric Power
• Metallurgy
• Machinery Manufacturing
• Chemical Processing
• Building Materials
• Food Processing
• Pharmaceutical Manufacturing
• Environmental Protection

Selection Table

NT50EX-20-	C2080	S2	G14M	G	025	/	P	Detailed Description
NT50EX-20-								NT50EX-20 series electronic digital display temperature sensor (explosion-proof type)
	C2080							Measurement range: -20…80°C (user-specified range available)
	C0100							Measurement range: 0…100°C (user-specified range available)
C50200								Measurement range: -50…200°C (high and low temperature type, user-specified range available)
C50400								Measurement range: -50…400°C (high and low temperature type, user-specified range available)
C100100								Measurement range: -100…100°C (high and low temperature type, user-specified range available)
C200100								Measurement range: -200…100°C (high and low temperature type, user-specified range available)
	S2							Two switch outputs
	A3							Two switch outputs + analog output (0…20mA/4…20mA)
	V5							Two switch outputs + analog output (0…5V/1…5V)
	V10							Two switch outputs + analog output (0…10V/1…10V)
		G12M						Mounting thread: G1/2 external thread
		G14M						Mounting method: G1/4 external thread
		N14M						Mounting method: NPT1/4 external thread
		N34M						Mounting method: NPT3/4 external thread
		R14M						Mounting method: R1/4 external thread
		M27M						Mounting method: M27*1.5 external thread
		K50						Sanitary clamp connection, 50.5mm outer diameter
			G					Electrical gland
			M20M					M20*1.5 external thread
			M27M					M27*1.5 external thread
				025				Probe rod length L=25mm (e.g., 025 represents probe rod length 25mm)
					D6			Probe rod diameter 6mm
					D8			Probe rod diameter 8mm
						P		PNP output
						N		NPN output