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Home > Sensors > Temperature Sensor > Thermocouple

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Thermocouple, J type, Sheath

$68.92

Sheath thermocouple have shielded thermocouple wire of common length 500mm and sheath diameter Ф3~Φ8mm, with flexibility, hig

SKU: CHN-TC-JS

Free Shipping Worldwide

Delivery date: 6-12 days

Overview
Documents

As a temperature sensor, thermocouple is usually used with display instruments, recording instruments and signal conditioners. Sheath thermocouple also can be used as a temperature sensing element for assembly thermocouple.

Specification:
1. S/E/K/J/T type thermocouple temperature range and accuracy chart

Category	Type of sensing element	Sheath diameter	Normal working temperature	Highest working temperature	Allowable deviation Δt
Category	Type of sensing element	Sheath diameter	Normal working temperature	Highest working temperature	Measuring range	Permissible deviation
Platinum Rhodium 10 - Platinum	S type	≥Φ3mm	1100℃	1300℃	0~1300℃	±2.5℃ or ±0.75%t
Nickelchromium - Copper nickel	E type	≥Φ3mm	600℃	700℃	0~700℃	±2.5℃ or ±0.75%t
Nickel chromium - Nickel silicon	K type	≥Φ3mm	800℃	950℃	0~900℃	±2.5℃ or ±0.75%t
Iron - constantan	J type	≥Φ3mm	500℃	600℃	0~600℃	Not specified
Copper - Copper nickel	T type	≥Φ3mm	350℃	400℃	＜-200℃	Not specified
Copper - Copper nickel	T type	≥Φ3mm	350℃	400℃	-40~350℃	±1.0℃ or ±0.75%t

2. Thermal response time of thermocouple

Sheath diameter (mm)	Thermal response time (s)
Sheath diameter (mm)	Shell type	Insulation type
2.0	0.4	0.5
3.0	0.6	1.2
4.0	0.8	2.5
5.0	1.2	4.0
6.0	2.0	6.0
8.0	4.0	8.0

3. Thermocouple wire structure chart

4. Selection chart

Branch number	Installing form	Mode of connection	Working end form	Multipoint type	Additional device	Sheath diameter	Sheath length
B1: Single branch; B2: Double branch	I1: No fixed device; I2: Fixed card sets of thread joint; I3: Movable card sets of thread joint; I4: Fixed card sets of flange; I5: Movable card sets of flange	C0: Simple terminals; C3: Standard waterproof protection head; C4: Explosion-proof protection head; C5: Standard plug; C6: Aviation plug; C7: Handheld; C8: Small waterproof protection head; C9: Direct lead wire	W1: Insulation type; W2: Shell type; W3: Open end type	M3: 3 points; M4: 4 points; M5: 5 points; M6: 6 points	S: Sanitary chuck; H: Heat collector	D3: Φ3; D4: Φ4; D5: Φ5; D6: Φ6; D8: Φ8	Φ3: 50~15000mm; Φ4: 50~10000mm; Φ5: 50~4000mm; Φ6: 50~2000mm; Φ8: 50~1000mm

5. Thermocouple installation diagram
6. Clip sleeve threaded joint dimension

Armoured thermocouple	Φ8	Φ6	Φ5	Φ4	Φ3	Φ2 and below
Fixing device number and size
M	M16*1.5			M12*1.5
S	22			19

Tips: How to prevent interference for thermocouple?

Isolation
Isolation method is to hang thermocouple in the air to isolate thermocouple from refractory brick of furnace wall, and thermocouple is also isolated from support by use of insulation object. The method can prevent interference of high temperature electric leakage.
Shielding
Shielding method is to make extension wire of thermocouple pass through iron tube or other metal shields to isolate. In this way, it can prevent electromagnetic interference and interference of high voltage electric field. When using this method, iron tube and shields should be connected with the ground well and twist the extension wire as well.
Ground connection
This method has two forms: The first is to connect the reference end of thermocouple with the ground, and second is to connect the measurement end of thermocouple with the ground.

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