Ranging from 0.01 NTU to 1000 NTU with a resolution in the 0-10 NTU range of 0.001 NTU, the TurbSense® online turbidity meter provides:
Anywhere where the measurement range is 0.01-1000 NTU (approx 0-2000 mg/l, application dependent) is a suitable application for the TurbSense® online turbidity meter.
Traditional online turbidity monitoring applications where the TurbSense® is particularly suited:
Calibration of the TurbSense® is simple and fast. Due to the patented method of measuring turbidity, calibration is only required every year or when a calibration check suggests that the calibration has changed. There are three ways to calibrate the TurbSense®.
The first is to place the sensor probe into a primary calibration standard inside the calibration chamber supplied. This primary calibration solution is likely to be a solution of Formazin or a suspension of Latex beads of known turbidity.
The second is by using a Secondary Standard from Pi. This is a solid that when placed against the end of the TurbSense® will give a response of a known turbidity (this secondary standard can be used to calibrate the turbidity sensor and also to provide a check of the calibration already in the probe).
The third way to calibrate a turbidity meter is to measure the turbidity of the sample using a handheld turbidity meter and using that result to calibrate the TurbSense®.
Each sensor has a light source, a side detector for the measurement of scattered light from the sample and a reference detector for monitoring the light output. The light source is a long-life IR LED emitter suitable for 15 years continuous use. By varying the light output it is possible to correct the signal for window fouling, zero, zero drift and electronics drift. This patented technique is how the TurbSense® breaks all norms for a probe based sensor in terms of performance.
The probes are made of stainless steel and sapphire so can work almost anywhere. An AutoClean flushing system can be included to keep the optical surfaces clean, thereby reducing maintenance to a potential ‘maintenance free’.
The TurbSense® online turbidity meter is suitable for dip monitoring and mounting in a debubbling flow cell whch can be pressured or not, depending on the likelihood of there being nucleating bubbles. Entrained bubbles can be removed using the debubbler.
Turbidity uses nephelometric turbidity units (NTU) and is a measurement of the ‘cloudiness’ of a water sample. Suspended solids describes the mass of solid particles suspended in a given volume of water and is most commonly expressed in mg/l. The two measurements are related, but the conversion between them will depend upon the properties of the suspended material.
Compared to glass or quartz, sapphire is much tougher and resistant to scratches. Additionally, because it is much stronger the window can be thinner, which improves the quality of optical transmission.
Turbidity in water is a measure of how cloudy the water is, and is used in making clean water for people to drink.
Yes, but there are factors end users should consider because the reliable operation of the sensor depends upon a powerful light source and sensitive optics. Reflections from walls and bends in pipes can cause problems in accuracy, so the turbidity of the process stream, the diameter of the pipe and the material used will need to be taken into account.
Larger diameter pipes and those made of less reflective materials are better; additionally, the higher the turbidity the more likely pipe insertion will be effective. At >200NTU, putting a TurbSense® into a pipe shouldn’t be a problem.
Many users who purchase TurbSense® use our AutoClean option to ensure optimum performance; pressurized water cleans the sensor head on a user designed schedule which greatly reduces maintenance times. Ideally the sensor should not be placed in direct sunlight as this can affect the reliability of the sensor.
The specially designed flow chamber provides the ideal environment for the TurbSense®. It removes entrained bubbles, is sealed against ambient light and its black polypropylene construction eliminates internal reflections. It also allows the sensor to be incorporated into a sample line along with other sensors.
The TurbSense® can come with the following options;
For samples with no nucleating or entrained bubbles and an atmospheric drain.
For samples with entrained air and with an atmospheric drain.
For samples with nucleating bubbles (air coming out of solution) or if no atmospheric pressure drain is available
For direct insertion into a pipe.
For mounting the TurbSense® on the end of a pole and dipping it into a tank or body of water.
For mounting the TurbSense® on the end of a pole and dipping it into a tank or body of water when the turbidity is low and sunlight could affect the readings.
A solid calibration standard to check the TurbSense® readings or to be used as a calibration. Available in 0.9 NTU and 18 NTU.
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