We are installing Oceasoft (Cobalt), They have probed sensor, can be dipped in glycerol-water but wired to data loggers, recording temp every 15 minutes. The date transfer from data loggers is wireless to a server computer, may send email and SMS and has a wireless hooter. We included Refs, Freezer, platelet incubators and room temp/humidity. New experience, not yet completely installed. We will change four hourly readings to daily one reading. Is it required daily one reading? We will set a 1 C acceptable variation between two systems and have set alarms/hooter at 1.5, 5.5 (Refs), -25 (freezers) and 20,24 for incubators. Please Comment I shall share my experience after a couple of months.