High Precision Reference Thermometer with Micro-Probe Ø1.1 mm for Vitrolife EmbryoscopeHigh Precision Reference Thermometer with Micro Probe 1. 1 mm for Vitrolife Embryoscope The G 1781 is a high precision reference thermometer that is specially calibrated for use with the Vitrolife Embryoscope, where the highest accuracy is required. The miniaturized probe is designed to be inserted in appropriate reference bore and to measure on site quickly and without distortion. Packaged meter and permanently attached probe and calibration