Conax Alternative Ceramic Tubewells

Conax Alternative Ceramic Tubewells

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Description

Non-Metal Thermocouple Tubewells

Material Chemical
Symbol
Operating
Temperature
Remarks
Sintered
Alpha
SASiC 3000°F
(1650°C)
No free silicon, higher density than SiC, low porosity, excellent
Silicon Carbide thermal shock resistance, high chemical, corrosion and abrasion resistance. Excellent thermal conductivity.
Silicon
Carbide
SiC 3000°F
(1650°C)
Excellent thermal conductivity, corrosion resistance and abrasion
resistance, good thermal shock resistance.
Fused
Quartz
SiO2 3050°F
(1677°C)
Excellent thermal shock resistance, unreactive to most acids and
metals, performs well in oxidizing, inert or neutral atmospheres.
Mullites 3Al2O32SiO2 2750°F
(1510°C)
Low thermal expansion, good thermal shock resistance,
excellent mechanical strength.

 

Tolerance of Thermocouples

°C °F
ANSI/ASTM Temperature Range Standard Special Temperature Range Standard Special
R or S 0° to 600°
600° to 1480°
±1.5°
±0.25% T
±0.6°
±0.1% T
32° to 1112°
1112° to 2700°
±2.7°
±0.25% (T-32)
±1.08°
±0.1% (T-32)
B 870° to 1700° ±0.5% T ±0.25% T 1600° to 3100° ±0.5% (T-32) ±0.25% (T-32)
C♠ 0° to 426°
426° to 2315°
±4.4°
±1% T
– 32° to 800°
– 800° to 4200°
±8°
±1% (T-32)

♠ Formerly Conax Technologies Type W5, Type C not an ANSI official designation.

 

Thermocouple Characteristics

ANSI/ASTM Symbol
Single
Generic
Names
Color Coding
Individual
Conductor
Color Coding
Overall Jacket
Extension
Grade Wire
 S  SP
SN
Platinum 10% Rhodium
Platinum
Black
Red
Green
R RP
RN
Platinum 10% Rhodium
Platinum
Black
Red
Green
B BP
BN
Platinum 30% Rhodium
Platinum 6% Rhodium
Gray
Red
Gray
 C CP
CN
Tungsten 5% Rhenium
Tungsten 26% Rhenium
Green
Red
Red

 

 

 

 

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