LH-133 Auto Turbidity Meter -Microprocessor based, This is a very accurate and stable instrument for measurement of readings up to 10-1000 NTU/JTU in 5 ranges, Range-0 to 10, 0 to 100,0 to200, 0 to 400 & 0 to 1000 NTU/JTU, Accuracy ± 3% of full scale, Test Tube System 30 mm clear glass test tube, Light Source 6 V, 1 Amp. Tungsten lamp, Display 4 digit red LED display, Detector Photocell/ Photodiode, Calibration With formazine solution, Power Supply 230V ± 10% AC, 50Hz with Built-in voltage stabilizer (HSN Code:90278090))