41 of 124  Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 08: Electrical Works  combined measurement and reference electrode and a resistance thermometer for temperature compensation  and all of these will be placed in an immersion or in-flow type mount to conform with each application.  Electrode systems will be positioned in such a way that it will prevent accidental damages, and will be easily  accessible for standardization and maintenance. In the locations where in-flow systems are used, system will be  mounted on a surface plate together with all connection pipes, pressure, and flow and isolation valves. Sample  water will be connected to the construction site drainage system with a pipe uniformly. The contractor will  provide a spare electrode for each pH measurement system. Transmitter shall include robust plastic housing. It  shall be possible for functionality modular extendable at any time. Transmitter shall be IP 66/67 for the field  conditions Modular 4 wire controller. Transmitter ambient temperature shall be between -20°C/ 60 $^{0}$C.  Common communication protocols and interfaces, such as 0/4...20 mA and Ethernet or 0/4…20mA/HART  shall be integrated.  It shall be possible for all non-ex applications.  Automatic sampling device shall be of industrial robust type, IP65, programmable, able to be manually used,  compatible with intermittent discharges, have LCD screen and battery support. The device shall be able to  close off when it is filled and shall be operated by a flow meter. It will be coupled by a peristaltic pump in order  to avoid contamination. Sampling volume shall be adjustable. Recorded data shall be easily transferred to PC.  Suction height from sampling point shall be 8 m. Process temperature 2 to 50 $^{0}$C. Pump tubing material shall be  silicone. Repeatability shall be 5%. The device shall be provided together with original accessories. It shall  have integrated refrigerator.  8.8.9 Automatic sampling device  8.8.10 Ultrasonic Level Measurement  8.8.11 Radar Level Measurement  8_Vol3_d4 3_Section 8 electrical works_en_GIR rev6.doc  Common communication protocols and interfaces, such as 0/4...20 mA and Ethernet or 0/4…20mA/HART  shall be integrated. The compensation shall be electronic. The accuracy of the level measuring system shall as a  minimum be (± %0.2) of the full scale. The full scale shall be selected according to the location of the level  measuring. Device shall have an integrated overvoltage protection. Detector will be appropriate to be mounted  in an open or covered tank and completely covered and protected against water that may reach on itself, IP68  rate protected from environmental effects. Control units must have independent balancing features between zero  and certain interval and its output must be between (4-20 mA) as proportional with the level. General accuracy  of the measurement device, must not be higher than (±2 mm) of the measurement device level indicator. The  connection between the detector and control units must be shielded type cable that is available in the market and  equipment must be able to operate with cables up to 60 meters. Material process connection shall be PVDF.  Level transmitters shall be provided for non-contact continuously measuring of liquid levels. Maximum  measuring range shall be up to 20 m. Measuring principle shall be operating based on the time-of-flight method.  The sensor shall be suitable for installation in wastewater/sludge and the sensor house shall be made of 316Ti or  galvanic steel. The field housing shall be in protection class IP66.