Explosion-Proof Assembly Thermocouple

Explosion-Proof Assembly Thermocouple is designed for fixed temperature measurement in hazardous industrial environments. It combines a mineral-insulated sheathed probe with a flame-proof junction box for installation on pipelines, vessels, furnaces, and industrial equipment. Threaded and flange mounting options are available, with probe diameter, insertion length, sheath material, cable, and connection details customizable for OEM and replacement applications. For help selecting thermocouple type, probe configuration, and mounting method, see our Thermocouple Selection Guide.

For a comparison of fixed assembly and mineral-insulated probe designs, see our Sheathed vs Assembly Thermocouple guide.

Explosion-Proof Assembly Thermocouple Features

Flame-proof junction box: Designed for fixed industrial temperature measurement in demanding environments.
Mineral-insulated probe: Provides good mechanical strength and vibration resistance.
Threaded or flange mounting: Suitable for pipelines, vessels, furnaces, and process equipment.
Sheath material options: SS304, SS316, and Inconel 600 are available.
OEM flexibility: Probe diameter, insertion length, mounting dimensions, cable, and connector can be customized.
L-Type configuration: 90° probe configuration is available by custom order.

Explosion-Proof Assembly Thermocouple with Flame-Proof Junction Box

Explosion-Proof Thermocouple Applications

Petrochemical and oil & gas equipment
Chemical reaction vessels
Industrial pipelines and pressure vessels
Pharmaceutical production equipment
Mining and industrial processing
Industrial furnaces and heating equipment
Hazardous-area temperature monitoring

Explosion-Proof Assembly Thermocouple Specifications

Item	Available Options
Thermocouple Type	K / J / T / E / N; S / R / B by custom order
Probe Diameter	Φ3 / Φ4 / Φ5 / Φ6 / Φ8 mm
Probe Insert Length	50–800 mm; custom lengths available
Probe Shape	Straight; L-Type by custom order
Mounting	Threaded / Flange
Thread Options	M16×1.5 / M20×1.5 / M27×2; custom threads available
Flange Options	DN25 / DN40 / DN50; ANSI B16.5 and custom options
Sheath Material	SS304 / SS316 / Inconel 600
Junction Box	Aluminum flame-proof junction box
Cable Gland	M-Type / NPT-Type optional
Connection	Internal terminal connection; custom external cable length
Junction Type	Grounded / Ungrounded; exposed by special order

Explosion-Proof Thermocouple Temperature Range

Type	Typical Range
Type K	-200°C to 1260°C
Type J	-40°C to 750°C
Type T	-200°C to 350°C
Type E	-200°C to 800°C
Type N	-200°C to 1300°C

Actual operating temperature depends on thermocouple type, sheath material, probe diameter, installation, and service conditions. The junction box working temperature is ≤200°C. An extended probe can be used to keep the junction box away from high-temperature sources.

Explosion-Proof Thermocouple Stock Sizes

Probe Diameter	Insert Length	Mounting
Φ3 mm	50–500 mm	Thread / Flange
Φ4 mm	50–600 mm	Thread / Flange
Φ5 mm	50–600 mm	Thread / Flange
Φ6 mm	50–800 mm	Thread / Flange
Φ8 mm	100–800 mm	Thread / Flange

Stock lengths are available within the listed ranges. Longer or non-standard dimensions can be custom-made.

Explosion-Proof Thermocouple Installation Notes

Select the appropriate threaded or flange connection for the equipment.
Install the probe to the required measurement depth.
The probe insertion depth is fixed after assembly.
Route the cable through the cable gland and maintain proper junction box sealing.
Keep the junction box away from direct heat sources when required.
For hazardous-area installations, verify that the complete assembly and installation meet the applicable site requirements.

Related Assembly Thermocouples

For a mineral-insulated probe without a flame-proof junction box, see our Sheathed Thermocouple.

Related Thermocouple Resources

Request OEM Explosion-Proof Thermocouple Support

Send us your thermocouple type, probe diameter and length, mounting type, thread or flange size, sheath material, junction box requirements, cable configuration, and application conditions. Drawings, photos, and existing samples are welcome.

Amy – Sales

Email:
Amy-Easewise@tzheater.com

WhatsApp:
+86 188 8318 8154

Hanna – Sales

Email:
Hanna-Easewise@tzheater.com

WhatsApp:
+86 173 5163 6811