A Portable Turbidimeter is a handheld diagnostic tool used to measure the “cloudiness” or turbidity of a liquid. In the field, it is the primary way environmental scientists and water technicians determine if water is clean, contaminated, or effectively filtered.
A portable turbidimeter is a handheld, battery-operated instrument used to measure the turbidity of a liquid—essentially, how cloudy or hazy it is. Turbidity is caused by suspended particles like silt, clay, microorganisms, and organic matter that scatter and absorb light.
LUTRON – TU-2016 – Turbidity Meter
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The standard unit of measurement is the Nephelometric Turbidity Unit (NTU).
Most modern portable turbidimeters use a technique called Nephelometry.
The Process : The device shines a light beam (usually a tungsten lamp or an infrared LED) into a small glass vial containing the water sample.
The Measurement : Suspended particles (silt, algae, microbes) scatter the light. A sensor positioned at a 90° angle to the light source measures the intensity of this scattered light.
The Result : The more light that hits the 90° sensor, the higher the turbidity, measured in NTU (Nephelometric Turbidity Units) or FNU (Formazin Nephelometric Units).
Most modern portable turbidimeters use the nephelometric method defined by the US EPA. They have a light source (usually an LED) and a photodetector set at a 90-degree angle to the light path.
The instrument shines a beam of light into the water sample.
Suspended particles scatter the light.
The detector at 90° measures the intensity of this scattered light.
The more light scattered, the higher the turbidity reading.
Many advanced models also use ratiometric or multiple-detector technology (detectors at 90°, 180°, and other angles) to compensate for color absorption and varying particle sizes, improving accuracy across a wide range.
Portable Turbidity Feature
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Portability & Durability: Rugged, waterproof (IP67 rating common), lightweight design for field use.
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Measurement Range: Typically from 0 to 1000+ NTU (some go up to 4000 NTU). High-precision models focus on the low range (0-10 NTU) for drinking water compliance.
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Accuracy & Resolution: Critical for low-level measurements. Look for instruments meeting regulatory standards (EPA Method 180.1, ISO 7027).
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Calibration: Easy, menu-driven calibration using AMCO/AEPA-style primary standards (e.g., formazin polymer gels or stable suspensions).
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Data Logging & Connectivity: Most store hundreds of readings with time/date stamps and offer USB or Bluetooth connectivity to transfer data to a computer or smartphone.
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Display & Interface: Backlit LCD screens with intuitive menus.
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Power Source: Rechargeable Li-ion batteries or standard AA batteries.
LUTRON – TU-2016 – Turbidity Meter
Feature |
Portable Turbidimeter |
Benchtop (Lab) Turbidimeter |
Location |
Field use, on-site testing |
Laboratory only |
Speed |
Immediate results on-site |
Requires sample transport, risk of change |
Sample Stability |
Measures before particles settle |
Sample can change during transport |
Data Management |
Good for field logging |
Often more advanced software |
Precision |
Good to excellent |
Typically highest precision for R&D |
Cost |
Generally lower |
Higher |
LUTRON – TU-2016 – Turbidity Meter
Lutron Turbidity Meter TU-2016 |
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Feature |
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Designed to meet ISO 7027 |
High resolution : 0.01 NTU/1 NTU |
NTU ( Nephelometric TURBIDITY Unit ) measuring unit |
Wide and auto measurement range : 0 to 1,000 NTU. |
The unique optics structure, enables the instrument to read low value of TURBIDITY to the high level up to 1,000 NTU. |
Microprocessor circuit assures maximum possible accuracy,provides special functions and features. |
Four operation buttons and two calibration points,easy operation. |
Battery operated for field and on-sitetesting convenience. |
Jumbo LCD, easy readout. |
Auto shut off is available to save battery life. |
Data hold function for freezing the desired value on display. |
Records Maximum and Minimum readings with Recall. |
Application : Test municipal water, food and beverage water, or other aqueous solution where fluid clarity is important. |
Heavy duty & compact housing with hard carrying case, designed foreasy carry out & operation. |
LUTRON – TU-2016 – Turbidity Meter
SPECIFICATIONS LUTRON TURBIDITY METER |
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Circuit |
Custom one-chip of microprocessor LSI circuit. |
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Display |
LCD size : 41 mm x 34 mm |
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Range |
0.00 to 50.00 NTU, 50 to 1,000 NTU* NTU : Nephelometric Turbidity Unit* Auto range |
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Resolution |
0.00 to 49.99 NTU |
0.01 NTU |
50 to 1000 NTU |
1 NTU |
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Accuracy ( 23 ± 5℃ ) |
0.00 to 49.99 NTU : ± 5% reading or ± 0.5 NTU, whichever is greater. |
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50 to 1000 NTU : ± 5% reading or ± 5 NTU, whichever is greater. |
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Light Source |
LED, 850 nm. |
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Detector |
Photo diode |
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Standard |
Meet ISO 7027. |
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Response Time |
Less than 10 seconds. |
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Sample Volume Needed |
10 mL. |
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Data Hold |
Freeze the display reading. |
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Memory Recall |
Maximum & Minimum value. |
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Display Sampling Time |
Approx. 1 second. |
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Power Off |
Auto shut off saves battery life or manual off by push button. |
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Calibration Points |
0 NTU, 100 NTU. |
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Operating Temperature |
0 to 50 ℃. |
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Operating Humidity |
Less than 85% R.H. |
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Power Supply |
DC 1.5 V battery ( UM4, AAA ) x 6 PCs, or equivalent. |
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Power
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Stand by |
Approx. DC 3.5 mA. |
Testing |
Approx. DC 36 mA. |
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Weight |
320 g/0.70 LB. @ Battery is included. |
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Dimension |
155 x 76 x 62 mm ( 6.1 x 3.0 x 2.4 inch) |
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Accessories
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Testing bottle with 0 NTU standard solution |
1 PC |
Testing bottle with 100 NTU standard solution |
1 PC |
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Empty testing bottle |
2 PC |
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Clean cloth |
1 PC |
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Clean solution ( Distill water ) |
1 bottle |
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Hard carrying case, CA-08 |
1 PC |
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Optional
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* Testing bottle with 100 NTU standard solution, TU-100NTU |
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* Testing bottle with 0 NTU standard solution, TU-0NTU |
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* Empty testing bottle, 0601 |
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LUTRON – TU-2016 – Turbidity Meter
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