J-Type Thermocouple Temperature Sensor (J3-50 PTFE)

This high-accuracy Type J Thermocouple (Iron/Constantan) is an excellent choice for monitoring temperatures in reducing atmospheres or for general-purpose applications where a higher sensitivity (mV per degree) than Type K is desired within a lower temperature range.

Technical Specifications

Feature	Specification
Sensor Type	Type J (Iron / Constantan)
Probe Dimensions	6mm (Diameter) x 50mm (Length)
Probe Material	316 Stainless Steel (Corrosion Resistant)
Lead Wire Length	1.5m (1500mm)
Insulation Material	PFA / PTFE (Teflon) - High chemical resistance
Color Coding	Black (+) / White (-) [IEC 60584 Standard]
Temperature Range	-40°C to +250°C (Limited by PFA lead rating)
Termination	Bare tails (Stripped ends)

Key Features

• High Sensitivity: Type J thermocouples offer a slightly higher millivolt output per degree than Type K, providing excellent resolution in standard industrial ranges.

• Robust Probe: The 6mm stainless steel sheath protects the sensing junction from mechanical damage and pressurised environments.

• Chemical Grade Leads: PFA insulation ensures the 1.5m leads remain flexible and intact even when exposed to oils, steam, or corrosive cleaning agents.

• Standardised Coding: Black and White leads follow IEC standards for immediate identification and easy wiring to temperature controllers or data loggers.

Applications

• Plastics Industry: Ideal for monitoring temperatures in injection moulding and extrusion.

• Vacuum Applications: Suitable for use in reducing atmospheres where Type K might be prone to "green rot."

• Food Processing: The stainless steel and PTFE construction is easy to sanitise.

• General Engineering: Used widely in heat treatment and equipment monitoring.