Since our founder built his first thermocouple in the garage of his Philadelphia row house in the early 1900′s, we have strived to achieve the utmost in customer satisfaction. When temperature matters is more than a slogan at National Basic Sensor; we are dedicated to being the industries’ source for thermodynamic expertise and temperature measurement products. Included in our manufacturing facility is our state of the art calibration laboratory. We calibrate a wide variety of temperature sensors and products. From common thermocouples and RTD’s, to difficult to calibrate units, like those with non-removable thermowells and mounting brackets, surface temperature probes, large diameter, and angled probes. NBS calibrates to a number of industry standards and maintains an ISO 9001:2015 certified calibration laboratory.


Our commitment to expertise starts with dedicated and experienced personnel. Expertise in sales, custom manufacturing, calibration, and quality assurance brings the highest quality products and services to each of our customers.

Custom Manufacturing

We custom manufacture, calibrate and document a complete line of thermocouples and RTDs from single elements to complex temperature measurement systems .


NBS can supply you with N.I.S.T. traceable calibration on thermocouples and RTDs. Our calibration lab is ISO 9001:2015 certified and 17025 compliant. We calibrate over a temperature range of -78°C to 1454°C.

Sales & Support

  • Sales staff expertise in thermodynamics
  • Thermocouple/RTD identification and evaluation
  • On-site storeroom audits
  • Corporate agreements
  • Blanket purchase orders
  • Consignment programs
  • In-house CAD technician and CAD software


  • On Site Machining, Stamping, Cutting, Threading & Brazing Capabilities
  • Welders & Procedures Qualified and Documented to ASME Section IX Standards
  • In-house manufacturing
  • Exotic materials