Walker Wireless offers NIST traceable temperature calibration and certification.  Standard Certifications are done using a Precision Calibration System in the temperature range of -20 C to 50 C.  Extended temperature ranges can be handled on a custom basis.   Calibration is available for our wireless temperature sensors and RTD probes.  All units will be 3-point certified and issued with certificates of NIST traceability as well as labels for the temperature transmitter and tags for the probes.