Type N Thermocouple Wire NP (Ni-cr-si) NN (Ni-si-magnesium)

• Thermocouple Wire

Type N Thermocouple (Nickel-Chromium-silicon / Nickel-Silicon-Magnesium):

The Type N thermocouple is composed of a nickel-14% chromium-1 1/2% silicon (+) wire versus a nickel 4 1/2% silicon-1/10% magnesium (-) wire. The Type N thermocouple is the newest addition to the ISA family. It was developed to be used under the same conditions as a Type K.

Type N should be used in oxidizing or inert atmospheres with a service temperature range between -200°C and 1260°C (-330°F to 2300°F). The addition of silicon and chromium makes this type of thermocouple more resistant to Green-Rot and less drifting when compared to a Type K.

The negative element, or NN, of a Type N thermocouple can be described by any of the following names: Nisil, nickel-silicon, or, HAI-NN1. The positive element, or NP, of a Type N thermocouple can be described by any of the following names: Nicrosil, nickel-chromium-silicon, or HAI-NP1.

• Thermocouple Wire

• ​Standards

Detailed Parameter of thermocouple wire

Working Temperature Range

• Size range

Wire: 0.12 to 8.0 mm.

• Application of thermocouple:

• Heating - Gas burners for ovens

• Cooling - Freezers

• Engine protection - Temperatures and surface temperatures

• High temperature control - Iron casting

• Type N Temperature Range:

• Maximum continuous operating temperature: up to 2,300F (1,260C)

• Short term use: 2,336F (1,280C)

• Thermocouple grade wire, -454 to 2300F (-270 to 1,260C)

• Extension wire, 32 to 392F (0 to 200C)

• Type N Accuracy (whichever is greater):
• Standard: +/- 2.2C or +/- .75%
• Special Limits of Error: +/- 1.1C or 0.4%​

Changzhou DLX Alloy Co., Ltd. was established in 2002 and has passed ISO9001 international quality management system certification and SGS certification.We initially focused on the production of resistance alloys. Over the past 20 years, we have continued to conduct research and development and now offer a range of alloy products, including Inconel, Monel, Hastelloy, high-temperature alloys, and other nickel-based alloys. Our commitment to meeting the needs of industries that require high strength, strong corrosion resistance, and high-temperature performance is reflected in our focus on developing these alloys.

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