Tintometer:

• Itis a device to determinecolour in water.
• The unit of colour measurement is TCU.
• 1 TCU is the colour produced by 1 mg of platinum cobalt in the form of chloroplatinate ions dissolved in 1 litre of distilled water.

Turbidimeter:

Turbidity is measured ona silica scaleand expressed in terms ofTurbid Units (TU)

Devices used to measure the turbidity in water are as follows:

1. Jackson’s Turbidimeter

It is used to measure high turbidity, i.e25 – 1000 mg/l

It cannot measure the turbidity less than 25 mg/l

2. Bayli's meter

It is used to measure low turbidity, i.e less than 10 mg/l

3. Ratio Turbidimeter

When a turbidity meter is measuring with “ratio on” it will use data from several detectors and take an average, in order to correct for changes caused by this particle size difference

4. Nephelometer

This works on the principle of light scattering.

It is a digital electronic device that measures lowturbidity in water with very high precision in no time

It measures the turbidity in terms of NTU (Nephelometric Turbidity Unit)