Calibration Services


       Elucit is set up to perform routine RH and temperature calibrations accurately, quickly and economically. We specialize in fast turn around. Three working days is standard, and we offer 24 hour service for an additional charge. Ask us about our Silicon Valley pickup and delivery service.

        Elucit maintains calibration facilities capable of producing known humidity values using the combined fundamental principals of the "two-pressure" and "two-temperature" generators developed by NIST. These systems are capable of continuously supplying accurately known humidity values for instrument calibration and evaluation. We utilize a Thunder Scientific Model 2500 "Two Pressure" Humidity Generator with a rated NIST-traceable RH accuracy of better than +/-0.5% RH over a range of 10% to 98% RH and 0 to 70° C, and a temperature accuracy of +/- 0.06 C. This chamber can be programmed for any RH or temperature point within the rated ranges.


Calibration Costs

Relative Humidity 10%-98%
Humidity calibration at 25° C. with "as-found" and "as-left" NIST-traceable documentation. 		$60.00 Per Point
Instrumentation Special
Three point (nominal 11%, 45% and 80% RH) relative humidity calibration at 25° C. and single-point temperature calibration at 25° C complete with "as-found" and "as-left" NIST-traceable documentation. 		$125.00
Temperature & Humidity Profiling
10% to 98% relative humidity, 0 to 70 degrees C with "as-found" and "as-left" NIST-traceable documentation. 		$80.00 Per Hour
For 24 Hour turn around multiply the above prices by 1.5.



The Two Preasure Calibration System

        The "two-pressure two-temperature" generation process involves saturating air with water vapor at a given temperature and pressure. The saturated high pressure air is then reduced to test pressure and test temperature. Humidity generation by this system does not depend upon measuring the amount of water vapor but rather on the measurements of temperature and pressure alone. The indication of saturation temperature, saturation pressure, test temperature, and test pressure, are used in the determination of all hygrometric parameters.

       The following documents present a complete uncertainty analysis of the Model 2500 in accordance with NIST Technical Note 1297. Each error source is identified, quantified, and combined to form an expanded uncertainty with a coverage factor of 2.

Relative Humidity Uncertainty Analysis
Chamber Temperature Uncertainty Analysis