NIT No. 15 Item No.1

Specification for Turbidity meter The turbidity meter will be able to measure the turbidity in NTU/FNU from 0.01 to 1000 NTU quickly. The instrument will operate on the nephelometric principle of turbidity measurement and is designed to meet the criteria specified in ISO 7027 and DIN 27027 standards. The turbidity meter must be able to measure the turbidity of colored water/waste water also.There will be light source and a detector to monitor the light scattered at 90° with respect to the incident beam. Measurement with infrared light at an angle of 90°. A compact instrument for reliable and easy determination of turbidity. A ring memory with 125 data sets and a USB interface guarantee an efficient data management. The instrument will be able to satisfy the turbidity measurement needs in the laboratory and field also and water proof as per IP 67 standards. The OEM is required to submit the declaration of conformity in accordance with EN ISO/IEC 17050-1 Other Specifications should be as under; Display LCD Automatic Range 0.01 to 19.99 NTU with 1 NTU resolution Precision ±2% of reading; ±1 LSD for 0-500 NTU; ± 3% of reading; ± 1 LSD 501-1000 NTU Response Time < 6 seconds Sample Requirement 10 ml Calibration 4 points Calibration Standards 0.02,20.0,100 or 200, and 800 NTU Sample Vials 24-25 mm diameter with indexing mark Light Source IR LED Power Battery conservation 4x AAA>3000 tests Auto shutoff after 20 minutes of inactivity Ambient Operating 0 to 50 °C (0 to 90% Non-considering Relative Humidity at 30 °C) Self-Diagnostics Yes, with troubleshooting error codes Waterproof rating IP67 Regulatory Approvals CE Make:- WTW, Hach, Lovibond, Merck , Thermo Fischer Scientific-Orion

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