pH Probe: Can anyone suggest a pH probe with data logging function/capabilities for use with our senior science groups?

pH Probe: Can anyone suggest a pH probe with data logging function/capabilities for use with our senior science groups?
This online resource deals with the effects of climate change.
This online resource looks at plastics and their future use in Australia.
This online resource examines the bleaching of coral due to climate change.
This online resource looks at cosmology.
This online resource helps teach the concepts of motion and energy transformations.
Laboratory doors security: Is it a requirement that science room doors be locked when n
Licence to purchase chemicals: Hi - I've had a few Year 11 students (Occ Health & Safety topic) ask about licences for chemicals held in schools, specifically the Science Dept.
How to use and care for a compound light microscope.
Disposal of reactants of chemical clock ac