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Type K Thermocouple Bare Wire

Type K Thermocouple Bare Wire

Type K thermocouple bare wire detail: Positive: Chromel, Negative: Alumel Color: · bright or oxidized Product Size: 0.05mm to 10.0mm Thermocouple bare wire is used at temperatures up to 1260°C (2300°F). MICC thermocouple bare wire is supplied with bright or oxidized surface according to standard...

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Type K thermocouple bare wire detail: 


Positive: Chromel, Negative: Alumel
Color: · bright or oxidized
Product Size: 0.05mm to 10.0mm


Thermocouple bare wire is used at temperatures up to 1260°C (2300°F). MICC thermocouple bare
wire is supplied with bright or oxidized surface according to standard or special EMF requirements.
Each individual lead is calibrated against platinum and the EMF values are shown on each coil or spool.



Thermocouple Variety and Index
VarietyTypeMeasurement Range()
NiCr-NiSiK–200–1300
NiCr-CuNiE–200–900
Fe-CuNiJ–40–750
Cu-CuNiT–200–350
NiCrSi-NiSiN–200–1300
NiCr-AuFe0.07NiCr-AuFe0.07–270–0


Thermocouple type and grade

Thermocouple TypeGradeTemperature Range()Allowable Deviation
type K and type NI–40–1100±1.5 or±0.4t
II–40–1300±2.5 or ±0.75t
III–200–40±2.5 or ±1.5t
type EI–40–1100±1.5 or ±0.4t
II–40–1300±2.5 or ±0.75t
III–200–40±2.5 or±1.5t
type JI–40–750±1.5 or ±0.4t
II–40–750±2.5 or ±0.75t
type TI–40–350±0.5 or± 0.4t
II–40–350±1.0 or± 0.75t
III–200–40±1.0 or± 1.5t
NiCr-AuFe0.07I–270–0±0.5
II±1.0


Specification of alloy wire

AnodeCathodeDiameter(mm)Maximum Temperature()
namecodenamecodelong-time usingshort-time using
NiCr10(Chromel)KPNiSi3(Alumel)KNΦ0.3700800
Φ0.5800900
Φ0.8  Φ1.09001000
Φ1.2  Φ1.610001100
Φ2.0  Φ2.511001200
NiCr14.2SiNPNiSi4NNΦ3.212001300
NiCr10(Chromel)EPCuNi45(Copel)ENΦ0.3  Φ0.5350450
Φ0.8  Φ1.0  Φ1.2450550
Φ1.6  Φ2.0550650
Φ2.5650750
Φ3.2750900
Fe(Iron)JPCuNi45(Copel)JNΦ0.3  Φ0.5300400
Φ0.8  Φ1.0  Φ1.2400500
Φ1.6  Φ2.0500600
Φ2.5  Φ3.2600750
Cu(Copper)TPCuNi45(Copel)TNΦ0.2  Φ0.3150200
Φ0.5  Φ0.8200250
Φ1.0  Φ1.2250300
Φ1.6  Φ2.0300350

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Superb Heater Technology has been focused on the production of type k thermocouple bare wire since 1985, which is well-known as one of the leading manufacturers and suppliers of type k thermocouple bare wire. In the past years, we owned strong reputation for the high quality, reliable performance and strong durability of our products. Should you are interested, please feel free to contact our factory.
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