Features • Low-torque metering system with long-term stability Apart from the turbine wheel, there are no mechanically actuated parts. • Battery-powered or mains-powered operation The standard design of the TEC 24 is powered by two lithium cells. In normal operating mode, the batteries have a service life of a minimum of six years and can be changed without opening the case. • Explosion protection The TEC 24 is intrinsically safe and can be used in zone 1. • Calculation of the K coeffi cient The volume corrector of the TEC 24 calculates the K coeffi cient in conformity with GERG 88S or AGA 8 gross method 1. • Two pulse outputs HF (Vm) and LF (Vm or Vb) • Flow display (HF sensor) The current fl ow value and the maximum value are displayed. • Digital interface A serial RS 485 interface with Modbus protocol is available for exchanging data. • 4-20 mA current output (transmitter) For designs with a current output board (an external power supply unit is required for devices located in areas subject to explosion hazards). • Remote totalizer (option)