The TestoKool 523, digital refrigeration system analyzer measures pressures and temperatures, and calculates superheat/subcooling for up to 38 refrigerants on all AC/R and heat-pump systems. It also monitors and controls refrigerant with the integral, two-way manifold and sightglass plus. The TestoKool 523 records 1,000 tests, and produces professional reports. The kit includes an integral boot and stainless steel hanger. For more information, visit www.testo.com. —Testo, Inc.