The programmable calculators can in many cases, via these connections, be used with peripherals such as data loggers and interfaces for instruments like thermometers, pH meters, weather instruments of all kinds, light meters, audio probes and microphones, dynamometers, pressure gauges, voltmeters, ammeters, ohm meters, atmospheric electricity measurement apparatus, ion counters, Geiger counters and scintillometers, altimeters, scales, accelerometers and many others.
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