TC007 Industrial Turbidimeter

The Kemtrak TC007 turbidimeter is a robust in-line turbidimeter designed for a wide range of industrial process applications. The Kemtrak TC007 uses the nephelometric method of turbidity measurement in accordance with International Standard ISO7027:1999(E).

The Kemtrak TC007 has an easy to use menu based software with a user configurable display that shows the turbidity value in real time. Additionally, the TC007 has a database and event handler to capture vital process information for use in quality assurance and plant control reports. All data is easily transferable to a PC via a USB interface.

Optic fibers are used to pipe the light from within the TC007 enclosure to the sampling point and back. This is a major benefit as all the electricity is kept within the analyzer enclosure permitting safe operation in even the most hazardous of environments.

Optic fibres can be ordered in lengths up to 50m and are well suited for harsh industrial environments. Our standard fibers have a silicone-coated steel jacketing and can withstand temperatures up to 200 °C. A range of robust flow-cell manifolds are also available dependent upon the process and application.

Sensor flanges - DIN flange DN25

Main features:

• Long life 880nm LED lightsource
• Simple & robust flowcell design using fibre optics - no electricity or heat near the sample
• Easy to operate - four push buttons, user-friendly menu and alphanumeric display
• Two alarms (high/low) and system fault monitoring
• Cleaning sequence control (relay output)
• PID Controller (pulse width modulated relay or
  4-20 mA analogue output)
• Analogue output (0-20/4-20 mA)
• Data & system event logger for quality control
• PC downloading software (Windows 2000, XP & Vista)
  
• Supply voltage 110/240 VAC
• IP65 protection
• Overall dimensions:220 x 120 x 100 mm (LxWxD)

* wavelengths must be factory installed

Turbidity is a measure of the lack of clarity or “cloudiness” of a fluid caused by undissolved particles. Turbidity is an optical property that causes light to be scattered and absorbed rather than transmitted in straight lines through the sample.

As light passes through a sample containing suspended solids, the particles absorb the light energy and re-radiate the energy in all directions. Particle shape, size, color and refractive index determine the spatial distribution of the scattered light by the particle. Particles smaller than the wavelength of light (e.g. bacteria) scatter light in equal intensities in all directions, while particles larger than the wavelength of light result in a greater forward scattering.

As the light scattered in the forward direction is variable depending upon the particle size, the measurement of light transmitted through the sample will yield variable results. This problem is eliminated when turbidity is measured at right angles to the incident light beam - an angle considered to be very sensitive to light scatter by particles in the sample. Both the International Standard (ISO7027:1999(E)) and North American EPA Method (1801.1) defining the measurement of turbidity requires scattered light measurement at 90°.

Modern turbidimeters use a technique called nephelometry, which measures the amount of light scattered at right angles to an incident light beam. The Kemtrak TC007 turbidimeter complies to International Standard ISO7027:1999(E), a European standard primarily defining the allowable turbidity in drinking water.

Both transmitted light and scattered light at 90° is measured and mathematically combined using a ratio algorithm to calculate the turbidity of the sample. The dual detection system and ratio algorithm provides a turbidity measurement that has significantly better performance with colored and/or light absorbing samples.

A 880nm long life LED light source is used to provide reliable turbidity measurements from 1 to well over 10000 NTU depending upon the configuration of the optical flowcell or probe. The Kemtrak TC007 is an instrument of high accuracy with long-term calibration stability.