Type K Thermocouple: Professional components for industrial temperature measurement

Short Description:

Type K thermocouple is one of the most widely used temperature sensors in industrial, commercial, and scientific applications. Renowned for its durability, wide temperature range, and cost-effectiveness, it has become a standard choice for temperature measurement across diverse sectors.

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Product Overview

Customized Stainless Steel Armored PT1000 Temperature Sensor Industrial Transducer,

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Key Specifications

Parameter	Specification
Temperature Range	-200°C to +1260°C
Accuracy (Standard)	±2.2°C or ±0.75% of reading, whichever is greater (for temperatures above 0°C)
Accuracy (Special Grade)	±1.1°C or ±0.4% of reading, whichever is greater (for temperatures above 0°C)
Thermoelectric Sensitivity (Seebeck Coefficient)	Approximately 41.2 µV/°C at 25°C (77°F)
Chemical Composition	Positive leg: 90% Ni / 10% Cr; Negative leg: 95% Ni / 2% Al / 2% Mn / 1% Si
Maximum Continuous Use Temperature	+1100°C for standard wire; +1260°C for high-grade wire
Minimum Use Temperature	-200°C

Measuring Range and Accuracy:

Type	Conductor Material	Code	Accuracy
			ClassⅠ		ClassⅡ
			Accuracy	Temperature range( °C )	Accuracy	Temperature range( °C )
K	NiCr-NiSi	WRN	1.5°C	-1040	±2.5°C	-1040
J	Fe-CuNi	WRF	Or	-790	or	-790
E	NiCr-CuNi	WRE	±0.4%\|t\|	-840	±0.75%\|t\|	-840
N	NiCrSi-NiSi	WRM		-1140		-1240
T	Cu-CuNi	WRC	±0.5°C or	-390	±1°C or	-390
T	Cu-CuNi	WRC	±0.4%\|t\|	-390	0.75%\|t\|	-390

Advantages of Type K Thermocouples

Wide Temperature Range

Type K thermocouples can measure temperatures from -200°C to +1260°C, making them suitable for applications ranging from cryogenic environments to high-temperature industrial processes such as furnace monitoring and metal smelting.

Cost-Effectiveness

Compared to other thermocouple types like Type S (platinum-rhodium) or Type B, Type K thermocouples are significantly more affordable while still delivering reliable performance for most industrial needs. This makes them ideal for large-scale deployments where cost per sensor is a critical factor.

Durability and Mechanical Strength

The Chromel-Alumel alloy combination offers excellent resistance to mechanical shock and vibration. The wires are robust enough to withstand harsh industrial conditions, including exposure to heavy machinery, high-pressure environments, and physical abrasion.

Good Oxidation Resistance

In oxidizing atmospheres (e.g., air, oxygen-rich environments), Type K thermocouples exhibit remarkable stability and longevity. A protective oxide layer forms on the surface of the wires, preventing further corrosion and extending the sensor's lifespan.

Linear Output

Type K thermocouples provide a relatively linear voltage-temperature relationship, especially between 0°C and 1000°C. This simplifies signal processing and reduces the need for complex calibration curves in many applications.

Calibration and Maintenance

Calibration Methods

To ensure accurate temperature readings, Type K thermocouples should be calibrated regularly. Common calibration methods include:

Fixed-Point Calibration:Using well-defined temperature points (e.g., freezing point of water at 0°C, boiling point of water at 100°C, melting point of zinc at 419.53°C) to verify the sensor's output.
Comparison Calibration:Comparing the thermocouple's output to a reference standard (e.g., a calibrated platinum resistance thermometer) in a controlled temperature bath or furnace.
In-Situ Calibration:Calibrating the thermocouple while it is installed in its operating environment, using portable calibration equipment.

Best Practices for Maintenance

Inspect the thermocouple junction regularly for signs of corrosion, damage, or contamination.
Ensure extension wires are of the correct type (Type K) to avoid introducing measurement errors.
Minimize stress on the wires and junction to prevent mechanical failure.
Store spare thermocouples in a dry, clean environment to avoid pre-installation contamination.
Document calibration dates and results to track sensor performance over time.

Our Company

Yancheng Xinrong Electronic Industries Co., Ltd. is a manufacturer specializing in industrial heaters. For example, armored thermocoupler / K-j screw thermocouple / mica tape heater / ceramic tape heater / mica heating plate, etc. Enterprises to independent innovation brand, establish "small heat technology" and "micro heat" product trademarks.

At the same time, it has a certain independent research and development capability, and applies advanced technology to the design of electric heating products to create the best product value for customers.

The company is in strict accordance with the ISO9001 quality management system for manufacturing, all products are in line with CE and ROHS testing certification.

Our company has introduced advanced production equipment, precision testing instruments, the use of high-quality raw materials; Have a professional technical team, perfect after-sales service system; Design and manufacture various types of high quality heater products for injection molding machines, suction machines, wire drawing machines, blow molding machines, extruders, rubber and plastic equipment and other industries.