[Electrode couple--glass and calomel electrode--for measuring the pH in small amounts of fluid with accommodation for temperature control].
D001826:Body Fluids; D004566:Electrodes; D005898:Glass; D006863:Hydrogen-Ion Concentration; D017669:Mercury Compounds; D013696:Temperature
D017669:Mercury Compounds; C015728:calomel
HYDROGEN-ION CONCENTRATION