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PTRA-341-18

Ceramic Thermocouple Protection Tubes

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Inner Diameter

0.75 in 1 in 0.0625 in 0.5 in 0.25 in 0.125 in 0.1875 in 0.375 in 0.3125 in 0.1563 in 0.0781 in 0.625 in 5 mm 0.4375 in 0.875 in

Length

18 in 12 in 24 in 36 in 6 in 3 in 300 mm 450 mm 600 mm

Outer Diameter

1 in 1.25 in 0.125 in 0.75 in 0.375 in 0.1875 in 0.25 in 0.3125 in 0.5 in 0.4375 in 0.1563 in 0.875 in 7 mm 0.6875 in 1.125 in

Process Connection Size

None 3/4 in 1/2 in 7/8 in

Tube Material

99.8% Aluminium Oxide 85% Mullite & 15% Glass

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C$130.75

Item# PTRA-341-18

Volume discounts available

Volume Discount Schedule

Quantity	Price each
1-9	C$130.75
10-24	C$124.21
25-49	C$121.60
50-99	C$116.37
100-199	C$113.75
200+	C$111.14

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In Stock

Lead Time (If not in stock): 4 weeks

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Product Specs

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Brand
Compressive Strength	>300,000 psi
Dielectric Constant	9.29
Dielectric Constant Note	Dielectric Constant (1MC): 9.29
Dielectric Strength	>230 V/mil
Fabrication Methods	Cast
Gas Permeability	Gas Tight
Hardness	9 Mohs
Hardness Note	Hardness (Mohs Scale): 9
Inner Diameter	0.75 in
Length	18 in
Operating Temperature, Max	1950 °C
Operating Temperature, Min	0 °C
Outer Diameter	1 in
Process Connection Size	None
Process Connection Type	None
Sensing End	Closed
Specific Gravity	3.85
Te Value	800 °C
Te Value Note	Te Value (Volume Resistivity of 1 mega Ω cm): 800°C (1470°F)
Tensile Strength	30000 psi
Thermal Conductivity	230 W/mK
Thermal Conductivity Note	Approximate Thermal Conductivity (BTU)(in)/(hr)(ft^2 )(°F) 24°C (75°F): 230 800°C (1470°F): 60
Thermal Expansion Coefficient	6.2 × 10^-6 C^-1
Thermal Expansion Coefficient Note	Coefficient of Linear Thermal Expansion 24 to 250°C (75 to 480°F): 6.2 x 10^-6 24 to 500°C (75 to 930°F): 7.4 x 10^-6 24 to 1000°C (75 to 1830°F): 8.5 x 10^-6 24 to 1500°C (75 to 2730°F): 9.8 x 10^-6
Transverse Strength	55000 psi
Tube Material	99.8% Aluminium Oxide
Volume Resistivity	10^13 Ω-cm
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Reviews

Show Ratings & Reviews

3.2

(5)

Rated 4 out of 5 by Aaron from Ceramic Thermocouple The product quality is great and works for the most part. Unfortunately, the 24 inch section I purchased arrived broken in 3 pieces. Now I know the shipping company probably stacked a refrigerator on top of this box but the packaging could have been better to protect the fragile material inside. In comparison, I have purchased steel from suppliers who package tough steel bar better than this thermocouple was packaged. This is why I only gave 4 out 5 stars.

Date published: 2017-03-13

Rated 5 out of 5 by Kirk C from Ceramic protection tubes Ceramic tubes came as ordered packaged well and undamaged.

Date published: 2023-11-27

Rated 5 out of 5 by Mikep from They are the exacted size they are supposed to be They work grate and They are the exacted size they are supposed to be

Date published: 2023-04-19

Rated 1 out of 5 by Anonymous from It's not 0.25" OD. It's 0.26" ... doesn't fit. I purchased the PTRA-31614-24 which is sold as a 0.25" OD, but it won't fit into any of my 0.25" hardware. I measured with calipers and it's 0.26"? Can't use them.

Date published: 2022-02-25

Rated 1 out of 5 by Anonymous from Need better packaging when shipped. The products came all broken, we couldn't use them.

Date published: 2020-10-01