Instruction Manuali-Series Sensors®i-Series Sensors - Rev. 00 as of 28.09.2012 Page 92.2 Use in accordance with the requirementsThe i-Series Intelligent Sensor is a highly developed ultrasonic level measure-ment system which provides non-contacting level measurement for a wide varie-ty of applications in both liquids and solids. Its unique design gives unrivalledperformance in echo discrimination and accuracy in a loop powered device.The device is exclusively intended to be used for purposes as described above.Modifying or using the devices for other purposes without the written consent ofthe manufacturer will not be considered as use in accordance with the require-ments.Damages resulting from this are left at user’s risk.The device is designed for a lifetime of approx. 10 years. After that period aninspection in addition with a general overhaul shall be made.Ex-ProtectionThe Ex-version of the sensor is designed to be used in areas with explosive at-mospheres (zone 1 or zone 0).The transmitter always has to be installed outside of Ex-zones!Approval (option)Sensor: II 2 G Ex mb IIC T4 GBII 2 D Ex mb IIIC T130°C DbII 1 G Ex ia IIC T4 GaII 1 D Ex ia IIIC T103°C DaThe approval is only valid in connection with the respective indication on thetransmitter or the sensor nameplate.For installation and initial start-up the conformity certificates and test certifi-cates of the respective authorities must be followed.