Delhi Jal Board

Delhi Jal Board has published Procurement Of Closed Cod Digester And Cod Vials For Laboratories Under Cwa ( W&S ) -Ii Division.-- 1 CLOSED REFLUX COD SSYTEM( Make : WTW/Thermo-fisher Scientific,/Lovibond/ HACH/Antylia )Scope of Supply : COD Photometer, COD Digester with 24 samples digestion assembly at a time, test tube stand and vials (15-300 mg/ltr oxygen and 20-1500 mg/Ltr. oxygen)Method : Analogous to ISO 15705:2002Measurement principle : Photometry closed reflux systemCOD Digester Specification:Construction materials : Housing: ABS , Protection grid: PPS , Lid: PC , Block insert: PBT , Heating block: Aluminium Holes in the Aluminum block : 24 holes, ø 16.2 mm ± 0.2 mmSelectable temperatures : 100 / 120 /150 °CProbe type : Pt 100 A classTemperature stability at Pt 100 : ± 1 °CSelected time : 30 / 60 / 120 / continuous (8) minHeating up from : (20 °C --> 150 °C) 12 minThermoregulation : MicroprocessorProtection against overheating : at the Auto block for 190 °CPhotometerSpecification:Instrument : double wavelength, automatic wavelength selection, direct reading colorimeterLight source: : LEDs, interference filters (IF) and photo sensor in transparent cell chamber. Wavelength specifications of the IF: 430 nm ?? = 5 nm, 610 nm ?? = 6 nmWavelength accuracy : ± 1 nmPhotometric accuracy : 3% FS (T = 20° C – 25° C)Photometric resolution : 0.01 APower supply : 4 batteries (AA/LR6) Operating time : 17hr operating time or 5000 measurements in constant use when display backlight and Bluetooth® data transfer are offAuto-OFF : automatic switch off 10 minutes after last key pressInterface : Bluetooth® 4.0 for the transfer of stored measurement dataTime : Real time clock und dateCalibration : user and factory calibration , resetting to factory calibration possibleAmbient conditions : Temperature: 5 – 40 °C , Rel. humidity: 30– 90 % (non-condensing)Portability : Bench top.Certification : The manufacturer should have ISO Certification for manufacturing Water testing instruments and reagents 2 Vials Ranges and Methods : Low range: 3 - 150 mg/L, meets ISO 15705:2002(500 vials) Middle range: 20 - 1500 mg/L, meets ISO 15705:2002 (3200 vials) . Last date of submission for this tender is 2023-02-20. This is a Miscellaneous Fasteners tender in Delhi, Delhi