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What sets JMS apart from the average temperature sensor manufacturer are the "extras" it provides to ensure customer satisfaction. The 24 hour Swifty Sensor Service (at no extra charge), our new calibration program that complies with ISO 9001 / OSHA PM 1910 and is NIST traceable, and the Rolling Purchase Order Program for special volume and OEM discounts are just a few of the "extras" that make us the best.

We offer a unique 24-hour delivery service of our products. The program is called Swifty Sensor Service and Monday through Friday, excluding holidays, and for most products this service is available at no extra charge. JMS will build your custom sensors and even thermowells for same day ship where possible over weekends, after hours and during holidays as well but extra charges will apply as we incentivize our employees to come in and make sure our customers get what they want no matter when they need it. Throughout the manufacturing process, JMS includes quality inspections. Our Quality Control Department conducts the final quality inspection on 100% of all sensors, including Swifty Sensor orders. JMS ensures strict compliance with customer required specifications which may include those of ASTM, ASME, NIST, ANSI IEC, and ISA among others. We are ISO 9001 certified through Underwriters Laboratories Inc. File #10001132 QM15, so all our operation procedures and work instructions are in compliance with the ISO 9001 standard.

Free Wake Frequency Calculator!

The JMS SwiftyCalc quickly provides you with a thermowell design based upon your material requirements and process variables that you can count on to meet the ASME PTC 19.3-TW standard. Save your results to your own account and return later to modify on the fly. JMS SwiftyCalc also provides you with instant theoretical maximums for insertion length and flow rate. SwiftyCalc is perfect for faster response time and increased reliability in your temperature measurement system.

To sign up for SwiftyCalc call or register below at the JMS Southeast link.  

Multipoint Flexible Thermocouples 
For Fixed Bed Te
mperature monitoring

1.) The unique SCC (Safety Containment Chamber) is a safety feature which will not allow process to accumulate in the junction box.  If it leaks or snaps off at the flange, it will be contained to up to 3000 PSIG, pressure gauge, and bleed valve for safe area vent.

2.) Up to 19 points per sheath with multiple sheaths in a single penetration



Introducing the new "Swiftwell" Thermowell 

Meet the new wake frequency calculation killer!  

Developed with Bechtel Engineering, this flanged thermowell enables longer, skinnier immersions into a pipe resulting in faster, more accurate temperature measurements. The flange holds pressure just like a normal van stone thermowell with pressure ratings per ASME B16.5. The machined thread fixes the thermowell with an established foundation compliance factor so that calculations can be run per the ASME / ANSI PTC 19.3TW Thermowells code!


Thermocouples and RTD's


Thermowells and Protection Tubes


Sensors and Thermowell assemblies

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