Testo-0563-5572-557-2-Hazardous-Substance-Meter-Set-Testo-0563-5572-P-The-Testo-0563-5572-is-a-557-2-Hazardous-Substance-Meter-Set-with-a-4-valve-HVAC-manifold-that-can-simultaneously-measure-superheat-&-sub-cooling-&-is-pre-loaded-with-40-refrigerant-profiles-eliminating-the-need-for-manual-PT-charts-The-built-in-vacuum-gauge-lets-you-know-when-you-have-reached-the-limits-when-evacuating-a-system-P-P-The-Testo-557-has-two-NTC-temperature-probe-inputs-that-can-measure-superheat-&-s