J Type Themocouple Temperature Sensor

Thermocouple Type:
J-Type (Iron-Constantan) thermocouple positive leg iron (Fe), negative leg constantan (copper-nickel).
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Temperature Range:
Typical operating range: 0C to +750C (standard)
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Some designs/specs show up to 760C continuous.
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Material Composition:
Positive conductor: Iron (Fe)
Negative conductor: Constantan (55% Cu / 45% Ni)
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Seebeck Coefficient (Sensitivity):
Approx. 5055 V/C
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Output Voltage:
At 100C, 5.27 mV typical (depending on length & junction).
RS Components

Accuracy / Tolerance (IEC/ANSI):
0.75% of reading typical (Class 2 general industrial)
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Equivalent to about 2.2C at some ranges.
Sense Thermo Instruments India Pvt. Ltd.

Color Coding (ANSI):
Positive lead: Black
Negative lead: Red
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Response Time:
0.55 s (bare wire) depending on junction & insulation.
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Output Characteristics:
Linear EMF vs temperature within operating range; requires cold-junction compensation for accurate use.
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Typical Physical & Industrial Details

Depending on variant, a J-Type thermocouple from TradeIndia sellers might include:

Probe & Sheath Options:
Sheath materials often SS304 / SS316 / Inconel for rugged industrial use.
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Mineral-insulated (MgO + metal sheath) for durability.
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Junction Types:
Grounded: Fast response
Ungrounded: Less electrical noise

Termination:
Lead wires with connectors or terminal head assemblies.
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Process Connections:
Threaded bosses, flanges, or compression fittings available.
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Standards & Calibration

J-Type thermocouples are typically manufactured and calibrated per:
IEC 60584-1 (international)
ANSI MC96.1 / ASTM E230 (American)
These define limits of error and temperature-voltage tables for each type.
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Typical Applications

Used widely for:
Industrial furnaces & ovens
Plastics / rubber processing
Heat treatment
Laboratory & general temperature control
Reducing or inert environments (preferred over oxidizing at higher temp)