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The Testo 570 is one refrigeration analysis instrument with multiple testing benefits. The Testo 570 is a robust refrigeration and heat pump analysis tool that can meet all your testing needs with just one instrument. With the 570, you can calculate superheat and subcooling simultaneously, measure pressure, temperature, current and vacuum, and record measurement values for up to 999 hours. The optional IR printer upgrade provides fast and easy on-site documentation of service work.