JACKSON TURBIDIMETER-

The standard method for the determination of turbidity has been based on the Jackson Candle turbidity meter. Turbidity measurements by the candle turbidity meter are based on the light path through a suspension, which just causes the image of the flame of a standard candle to disappear, that is, to become in indistinguishable against the general background illumination when the flame is viewed through the suspension. The longer the light path, the lower the turbidity

Jackson Turbidimeter with graduated glass turbidity tube, tubular metal shield, standard candle and support in accordance with A.P.H.A. Standard method for the Estimation of Water, and sewage. The turbido tube has flat polished bottom, and is graduated from 0 to 25 centimeter. in 1 mm division and from 100 to 5000 parts per million. A spring beneath the candle keeps it pressed against the top of the candle holders, which is 76 mm below the bottom of the tube. Overall height including glass tube, 22"long.