Data transmitters, signal transmitters and electronic transmitters for transmittal of electronic signals; electrodes; detectors for detecting force, pressure, gas, flow, humidity, moisture, ionization and pH; devices, systems, as well as replacement parts thereof, namely, computer programs for use in database management and in the field of pH measurement, redox measurement, measurement of ions, ion selective measurement, oxygen measurement and conductivity measurement to record measurements, process data, analyze data and calculate measurements; data processing devices, namely, data processors, mobile data receivers and data senders; electronic controls for electrodes and sensors for pH measurement, redox measurement, measurement of ions, ion selective measurement, oxygen measurement and conductivity measurement; displays, namely, LCD, LED, TFT, touch screen and screen projector displays; holders for sensors and electrodes; housings for sensors and electrodes; pH measurement sensors; redox measurement sensors; ion measurement sensors; ion selective measurement sensors; oxygen measurement sensors; conductivity measurement sensors