Turbidity Meter, Turbidimeter - TurbSense®
The turbidity meter from Pi is the world’s only probe based turbidity meter with a resolution of 0.001NTU. It achieves this through its patented technology that complies with international standard ISO 7027 at the same time that it sets the standard in stability and low maintenance.
The patent relates to the measurement of the emitted light as well as the received light allowing the TurbSense® turbidimeter to vary the light output. Doing this allows for the mathematical correction for zero, zero drift, aging optics and fouling windows. The TurbSense® self-calibrates every time it takes a reading and therefore it is only necessary to check the calibration every several months.
| Document | Type | Size |
|---|---|---|
| TurbSense® | Brochure | 631kB |
| TurbSense® Calibration | Article | 942kB |
| TurbSense® Secondary Standards | Technical Note | 676kB |
| TurbSense® Mounting Options | Technical Note | 948kB |
| US Turbidity Trial | Article | 924kB |
| Bubbles in Turbidity | Technical Note | 584kB |
| Overcoming ‘Noise’ and Establishing a ‘Zero’ | Technical Note | 677kB |
| Secondary Standards Instructions | Technical Note | 563kB |
| Probe Fouling | Technical Note | 459kB |
FAQs
What is the difference between turbidity and suspended solids?
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.
What is the best way to calibrate my TurbSense®?
Why are the TurbSense® windows made of sapphire?
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.
Is there a maximum temperature that TurbSense® can be used at?
Yes, 50°C or 120°F. This is because the electronics inside the TurbSense® will start to degrade in temperatures higher than that.
What is turbidity in water?
Turbidity in water is a measure of how cloudy the water is, and is used in making clean water for people to drink.
Can I put a TurbSense® sensor in a pipe?
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.
I am thinking about buying a TurbSense®. Is there anything else I should think about?
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.
What is the purpose of the TurbSense® flow chamber?
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.
Open flow cell
For samples with no nucleating or entrained bubbles and an atmospheric drain.
Open flow cell with de-bubbler
For samples with entrained air and with an atmospheric drain.
Closed flow cell
For samples with nucleating bubbles (air coming out of solution) or if no atmospheric pressure drain is available
Pipe insertion kit
For direct insertion into a pipe.
Dip mounting kit
For mounting the TurbSense® on the end of a pole and dipping it into a tank or body of water.
Dip mounting kit with light shield
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.
Secondary calibration standard
A solid calibration standard to check the TurbSense® readings or to be used as a calibration. Available in 0.9 NTU and 18 NTU.
Options
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Chemtrac - Atlanta
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Equip Solutions - Illinois, USA
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Link Automation - USA
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Lloyd Gruginski
Chehalis WTP - Chehalis, WA
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Scottish Water - UK
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Wexford Co. Co. - Ireland
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Detectronic - UK
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Wexford Co. Co. - Ireland
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Pool Sentry - UK
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Karis Technical Services Ltd. - UK
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Branislav
ECM ECO Monitoring - Slovakia
"Simply the best turbidity available."
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Chemtrac - Atlanta, GA
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Li Yongjun
Jinan Hongquan Water Company - China
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Jiao Tumei
Qingdao Guolin Environmental Technology Co., Ltd., - China
"Over the last few years we've purchased chlorine and turbidity analyzers from Chemtrac and with routine calibration the probes measure the chlorine and turbidity without any issue. We are very happy with this product and would highly recommend them."
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Ocoee Utility District - Ocoee TN
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Thermomed - Turkey
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Xiamen Xishan Water Plant - China
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SC KATALIN NOHSE CHIMIST IMPORT SRL - Romania
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