9 Calorimeters; Flow meters; Flowmeters; Gas flow meters; Level gauges; Liquid level sensors; Measuring instrumentation and apparatus, namely, digitizers; Panel meters, namely, an electronic instrument that displays an input signal in either a digital or analog form; Technical measuring, testing and checking apparatus and instruments for measuring, testing and checking the temperature, pressure, quantity and concentration of gas and liquids; Water meters; Weighing apparatus and instruments