More Technology...

Let's assume you surmounted your fear of new technology and bought a digital temperature probe.  You even downloaded Vernier's Loggerlite software and successfully used the probe.  Yeah!  I remember how heroic I felt, too!  You're ready for more!  Do you have an iPad?  Vernier's competition, Pasco, has terrific probes which link via Bluetooth reliably.  (Okay, I had kids trouble-shoot the Bluetooth connection.  But, I can use it now!)  Pasco software and probes are a bigger investment and also require Sparkvue software and and interface, such as Airlink2.  Pasco has tremendous support. I shop eBay for sensors to save money. This temperature probe is $14.50.  The pH probe is just under $40.  I have been able to buy Airlink interfaces on eBay.  It's much easier to buy probes.  There are gobs of ideas for labs here.