Type

Graduation

Tolerance class

I

II

Tolerance value

Measuring range°C

Tolerance value

Measuring range°C

WRK

K(Ni-Cr-/Ni-Si)

±1.5°C

-40~+375

±2.5°C

-40~+333

±0.004|t|

375~1000

±0.0075|t|

333~1200

WRN

N(Ni-Cr-Si/Ni-Si)

±1.5°C

-40~+375

±2.5°C

-40~+333

±0.004|t|

375~1000

±0.0075|t|

333~1200

WRE

E(Ni-Cr/Cu-Ni)

±1.5°C

-40~+375

±1.5°C

-40~+333

±0.004|t|

375~800

±0.004|t|

333~900

WRF

J(Fe/Cu-Ni)

±1.5°C

-40~+375

±1.5°C

-40~+333

±0.004|t|

375~750

±0.004|t|

333~750

WRC

T(Cu/Cu-Ni)

±1.5°C

-40~+125

±1°C

-40~+133

±0.004|t|

125~350

±0.0075|t|

133~1000

WRP

S(Pt-Rh10/pt)

±1°C

0~+1100

±2.5°C

0~600

±[0.003(t-1100)]

1100~1600

±0.0025|t|

600~1600