Feature white backing Multiple calibration points are used to compensate for nonlinear expansion of liquid Thermometers with low ranges of -200°C to +30°C are filled with pentane; -100°C to +50°C with xylene mixture Red liquid thermometers at other ranges are filled with kerosene Liquid in the 15-038 thermometer will begin to freeze at about -193°C, but only after 30 to 60 minutes of exposure
Indicated immersion levels must be observed for accurate readings
Certifications NIST traceable, Accuracy to ANSI™/SAMA tolerances