Thermo/Probes Inc.

Office: (713) 699-1393

Thermocouples

Thermo/Probes, Inc. manufactures quality industrial thermocouple sensors. Thermocouples can be applied in most temperature measurement and control applications. With over 40 years of experience, we are prepared to provide thermocouple temperature sensor solutions for the most complex situations.

Thermocouple Downloads

Armored Thermocouples

Standard Thermocouples

Embedded Sensors

Cuttable Sensors

Industry Assembly Without Thermowell

Thermocouple Characteristics

ANSI/ASTM Thermocouple Layout Symbol Single Material (Composition) Tolerance (Celsius) Tolerance (Fahrenheit)
Temp. Range Standard Temp. Range Standard
T TP Copper -200° to -67°
-67° to 133°
133° to 370° 		± 1.5% T
± 1°
± 0.75% T 		-328° to -88°
-88° to 272°
272° to 700° 		± 1.5% (T - 32)
± 1.8°
± 0.75% (T - 32)
TN Constantan (55% Cu, 45% Ni)
J JP Iron 0° to 293°
293° to 760° 		± 2.2°
± 0.75% T 		32° to 560°
560° to 1400° 		± 3.96°
± 0.75% (T - 32)
JN Constantan (55% Cu, 45% Ni)
E EP Chromel (90% Ni, 10% Cr) -200° to -170°
-170° to 340°
340° to 870° 		± 1% T
± 1.7°
± 0.5% T 		-328° to -274°
-274° to 644°
644° to 1600° 		± 1% (T - 32)
± 3.06°
± 0.5% (T - 32)
EN Constantan (55% Cu, 45% Ni)
K KP Chromel (90% Ni, 10% Cr) -200° to -110°
-110° to 293°
293° to 1260° 		± 2% T
± 2.2°
± 0.75% T 		-328° to -166°
-166° to 560°
560° to 2300° 		± 2% (T - 32)
± 3.96°
± 0.75% (T - 32)
KN Alumel (95% Ni, 2% Mn, 2% Al)
N NP Nicrosil (84.6% Ni, 14.2% Cr, 1.4% Si) 0° to 293°
293° to 1250° 		± 2.2°
± 0.75% T 		32° to 560°
560° to 2300° 		± 3.96°
± 0.75% (T - 32)
NN Nisil (95.5% Ni, 4.4% Si, 1% Mg)
S SP Platinum (10% Rhodium) 0° to 1260°
1260° to 1480° 		± 1.5°
± 0.25% T 		32° to 2300°
2300° to 2700° 		± 2.7°
± 0.25% (T - 32)
SN Pure Platinum
R RP Platinum (13% Rhodium) 0° to 1260°
1260° to 1480° 		± 1.5°
± 0.25% T 		32° to 2300°
2300° to 2700° 		± 2.7°
± 0.25% (T - 32)
RN Pure Platinum
B BP Platinum (30% Rhodium) 870° to 1700° ± 0.5% T 1600° to 3100° ± 0.5% (T - 32)
BN Platinum (6% Rhodium)
C * P Tungsten (5% Rhenium) 0° to 426°
426° to 2315° 		± 4.4°
± 1% T 		32° to 800°
800° to 4200° 		± 8°
± 1% (T - 32)
N Tungsten (26% Rhenium)