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TurbiDirect_6 02/2019
1.1
General description
The TB300 IR is a portable turbidity meter, based on the requirements of ISO 7027 (Water
Quality – Determination of Turbidity). The instrument works with rechargeable batteries as
well as with mains. As soon as the TB300 IR is connected with the adapter to the mains the
batteries are charged.
The instrument features auto ranging over the range of 0.01 to 1100 NTU/FNU.
The turbidimeter is supplied in a case complete with accessories and spares. Calibration
Standards guarantee stability and reproducibility of the results. Always replace the cover on
the sample chamber to protect against dust.
It is possible to update new software applications via internet (www.lovibond.com).
Please find detailed information at our homepage on the download-area.
1.2 Operating principles
The instrument measures turbidity in the range 0.01 to 1100 NTU/FTU featuring auto ranging.
The light source is an infrared LED (light emitting diode) with a wavelength of 860 nm.
The emitted light is reflected by turbidity in the sample. The scattered light will be detected
at an angle of 90° by a photodiode.
This principle is part of ISO 7027.
The international Reference Standard for turbidity is a Formazin solution. Results related to
these standards are indicated as FNU (Formazine Nephelometric Units).
