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K Series Thermocouple

K Series Thermocouple
Details:
The nut-type k series thermocouple is a commonly used temperature sensor with fast thermal response and high temperature measurement accuracy.
It is suitable for various temperature measurement and control in the industrial field.
Its structure is composed of one end of the thermocouple wire welded together
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Technical Parameters
Size & Wiring

The nut-type k series thermocouple is a commonly used temperature sensor with fast thermal response and high temperature measurement accuracy. It is suitable for various temperature measurement and control in the industrial field. Its structure is composed of one end of the thermocouple wire welded together. The temperature measurement point is placed in a copper sleeve, and a copper fixing thread is used as a temperature probe. The other end is directly extended to the required length as a lead to form a nut-type thermocouple type K. It is generally used to measure the temperature of heated metal solids. Stainless steel braided wire thermocouples are commonly used in long-term measurement scenarios of 0-250 degrees.

k type thermocouple -1
k type thermocouple

 

Appearance judgment of k series thermocouple hot electrodes

 

1. The new K type thermocouple should have a uniform and straight thermoelectric electrode diameter, with no cracks, burrs, or interlayers on the surface; Precious metal thermocouples should not have fragile thermoelectric defects, and there should be no serious color spots or blackening after cleaning.

 

2. The welding quality of the K-type thermocouple measurement end can affect the reliability of temperature measurement. It is required that the measurement end be firmly welded, which have a metallic luster, and a smooth surface, without contamination, deterioration, slag inclusion, and cracks. The size of the welding point should be as small as possible, and the diameter of the welding point is usually twice the diameter of the thermoelectric electrode.

 

3. The inspection of the appearance quality of k thermocouple thermal electrodes is generally carried out by visual inspection or observation with the help of a low magnification lens. When checking the diameter of the even wire, a measuring tool with an accuracy of no less than 0.01mm should be used in two vertical directions on the same section.

 

FAQ：

 

Q: What should be done if the K series thermocouple temperature measurement is inaccurate?

A: 1. Errors introduced due to insulation deterioration. Excessive dirt or salt residue on thermoelement type K protection tubes and pull plates can lead to poor insulation between thermoelectric dipoles and furnace walls, which is even more severe at high temperatures. This not only causes loss of thermoelectric potential but also introduces interference, resulting in errors that can sometimes reach hundreds of degrees. 
 
 2. Error introduced by thermal inertia. Due to the thermal inertness of type k thermocouple wire, the indicated values of the instrument lag behind the changes in the measured temperature, which is particularly prominent during rapid measurements. Therefore, K Series Thermocouple with thinner thermoelectric electrodes and smaller protective tube diameters should be used as much as possible. When the temperature measurement environment permits, the protective tube can even be removed. Due to measurement lag, the amplitude of temperature fluctuations detected by K-type wire thermocouple is smaller than that of furnace temperature fluctuations. The larger the measurement lag, the smaller the amplitude of the thermocouple fluctuation, and the greater the difference from the actual furnace temperature. When using a thermocouple with a large time constant for temperature measurement or control, although the temperature displayed on the instrument fluctuates very little, the actual furnace temperature may fluctuate greatly. To accurately measure temperature, a thermoelement type K with a small time constant should be selected. The time constant is inversely proportional to the heat transfer coefficient and directly proportional to the diameter of the thermocouple's hot end, material density, and specific heat. To reduce the time constant, besides increasing the heat transfer coefficient, the most effective way is to minimize the size of the hot end as much as possible. In use, materials with good thermal conductivity and protective sleeves with thin walls and small inner diameters are usually used. In more precise temperature measurements, bare wire K Series Thermocouple without protective sleeves are used, but thermoelement type K is prone to damage and should be corrected and replaced promptly.

Q: How about your service?

A: A. On-time delivery time: We fit your order into our well-organized production schedule, ensuring your on-time delivery. Production report before packing the order. Shipping notice and photos will be sent to you as soon as your order is shipped.

B. After-sales service: We pay great attention to your feedback after receiving the goods. We provide a 12-month warranty after the goods arrive. We promise that all parts are for lifetime use. We will respond to your complaints within 48 hours.

C. Professional sales: We value every inquiry sent to us and ensure fast and competitive quotations. We work with customers for bidding. Provide all necessary documents. We are a sales team with all technical support from an engineer team.

 

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K-type thermocouple specifications
 

 

Model Products Name Wire material Line skin

Wire diameter

(MM)

 Wire core specifications

length

(MM)

 Graduation mark

Actual application temperature

(℃)

 thermal conductor Thermal conductor material

Thermal conductor size

(MM)

 Nut material Thread Nut size Connection terminal

Connection terminal size

(MM)

 Spring material Spring size (outer diameter * length MM) Insulated/non-insulated
TS-M6-05 Nut type K-type thermocouple KX nickel chromium nickel silicon stainless steel braided 2*3 7*0.2 500 K 0-250 casing Nickel plated copper 4*25 Nickel plated copper M6 13.5*10*11*3.5mm Red and blue SV fork 20*6.5/4.3*0.5 spring steel 6*50 non-insulated
TS-M6-10 Nut type K-type thermocouple KX nickel chromium nickel silicon stainless steel braided 2*3 7*0.2 1000 K 0-250 casing Nickel plated copper 4*25 Nickel plated copper M6 13.5*10*11*3.5mm Red and blue SV fork 20*6.5/4.3*0.5 spring steel 6*50 non-insulated
TS-M6-15 Nut type K-type thermocouple KX nickel chromium nickel silicon stainless steel braided 2*3 7*0.2 1500 K 0-250 casing Nickel plated copper 4*25 Nickel plated copper M6 13.5*10*11*3.5mm Red and blue SV fork 20*6.5/4.3*0.5 spring steel 6*50 non-insulated
TS-M6-20 Nut type K-type thermocouple KX nickel chromium nickel silicon stainless steel braided 2*3 7*0.2 2000 K 0-250 casing Nickel plated copper 4*25 Nickel plated copper M6 13.5*10*11*3.5mm Red and blue SV fork 20*6.5/4.3*0.5 spring steel 6*50 non-insulated
TR-M6-05 Nut type K-type thermocouple KX nickel chromium nickel silicon Silica gel 3 7*0.2 500 K 0-200 casing Nickel plated copper 4*25 Nickel plated copper M6 13.5*10*11*3.5mm Red and blue SV fork 20*6.5/4.3*0.5 spring steel 6*50 non-insulated
TR-M6-10 Nut type K-type thermocouple KX nickel chromium nickel silicon Silica gel 3 7*0.2 1000 K 0-200 casing Nickel plated copper 4*25 Nickel plated copper M6 13.5*10*11*3.5mm Red and blue SV fork 20*6.5/4.3*0.5 spring steel 6*50 non-insulated
TR-M6-15 Nut type K-type thermocouple KX nickel chromium nickel silicon Silica gel 3 7*0.2 1500 K 0-200 casing Nickel plated copper 4*25 Nickel plated copper M6 13.5*10*11*3.5mm Red and blue SV fork 20*6.5/4.3*0.5 spring steel 6*50 non-insulated
TR-M6-20 Nut type K-type thermocouple KX nickel chromium nickel silicon Silica gel 3 7*0.2 2000 K 0-200 casing Nickel plated copper 4*25 Nickel plated copper M6 13.5*10*11*3.5mm Red and blue SV fork 20*6.5/4.3*0.5 spring steel 6*50 non-insulated

 

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