Replacement Crematory Thermocouples
By National Basic Sensor
Reliable, American-Made Assemblies to Keep Your Retort Running.
Backed by a century of manufacturing excellence.
Orders before 2pm EST processed same day.
Complete Thermocouple Assemblies
Type K ceramic crematory thermocouple assemblies with 3/4" NPT fittings, manufactured in the USA and built to handle the extreme heat of crematory retort operations.
Type K Ceramic Assembly with 3/4" NPT Fitting
Available in 12", 18", and 24" lengths — in stock and ready for same-day processing on orders received before 2 pm EST.
A Full Assembly Includes:
- Type K 8-gauge element
- Ceramic mullite protection tube (3/4" OD)
- Terminal block
- Aluminum connection head
Select Length:
Bulk pricing available for orders of 5 or more
Replacement Element & Block
A cost-effective alternative to a full assembly replacement. Keep your retort running with a Type K element and terminal block sized for your existing thermocouple.
Type K Replacement Element & Block
Designed to replace the internal element and block of your existing crematory thermocouple assembly. Available in lengths to match our 12", 18", and 24" complete assemblies.
Each Kit Includes:
- Type K 8-gauge element
- Terminal block
- Made in USA
Select Length:
Not sure which size? Contact us with your retort make & model.
Why Buy From National Basic Sensor
Built to Last
An unreliable probe can cost you downtime and repeated replacements. NBS assemblies are manufactured on-site in Pennsylvania using ASME-certified welding and robust 8-gauge elements, ensuring they withstand the extreme conditions of your retort.
Accuracy You Can Document.
NIST traceable calibration (32°F to 2300°F). ISO 9001:2015 certified for guaranteed accuracy.
Access to Application Expertise
Our in-house specialists are trained in thermodynamics and material science. We don't just sell parts—we provide engineering-level support to ensure you have the optimal sensor for your specific retort model and operational conditions.
Frequently Asked Questions
Will these thermocouples fit crematory retorts?
Yes. We offer standard 12″, 18″, and 24″ Type K assemblies with 3/4″ NPT fittings, and can match other specs on request.
- Replacement elements available separately.
- For other sizes or fittings, call 800-642-1357.
What's included in a complete assembly?
An 8-gauge Type K element, a mullite protection tube, a terminal block, and an aluminum connection head.
What information helps you quote the right replacement?
Cremator make/model, probe location (primary or afterburner), OD and immersion length, and any markings/photos.
When will my order be processed?
- Orders received after 2 pm EST are processed the following business day.
- Orders received before 2 pm EST are processed the same business day (processing ≠ shipping).
Do you offer custom lengths or materials?
Yes. NBS custom manufactures thermocouples/RTDs (lengths, diameters, fittings, and materials including Inconel, Stainless, and ceramic options).
Can you match my existing OEM thermocouple?
Yes. NBS provides identification and evaluation and can match OEM specifications; documentation is kept for easy reorders.
Do you support other thermocouple types?
Type K is standard for the listed assemblies; other types (e.g., N, R, S) are available through NBS on request.
Retort Down? Need Immediate Help?
Call 800-642-1357 • Orders before 2pm EST processed same day