Imhoff Cone Secchi Disk Turbidity Meter Weight and Line Turbidity Test Kit
Imhoff Cone Secchi Disks Turbidity Meter
Weight and line Turbidity Test Kit
Turbidity Tube Turbidity Standard
Turbidity Tube LaMotte Turbidity

turbidity meter


New RATIOMETRIC design in one of the most innovative, WATERPROOF, handheld meters available on the market!

The multi-detector optical configuration assures long-term stability and minimizes stray light and color interference. The new ratiometric design allows for easy and accurate testing. The nephelometric mode measures 0-40 NTU/FNU, ratiometric mode 40-1000 NTRU/FNRU and 1000-2000 AU. Now pinpoint the range of interest with better, more reliable results. Ideally suited for low-level drinking water applications, mid-range industrial applications, and high-range environmental applications.
- Seven user selected languages - English, Spanish, French, Japanese, Chinese, Italian, and Portuguese
- Advanced calibration algorithms
- Easy menu driven operation and large LCD display
- 500 point data log; stored results can be viewed directly on instrument

2020i Meets design criteria for quantitative methods of turbidity using optical turbidimeters as specified by ISO 7027.

Kits are supplied with 0, 10, 100 FNU (Code 1974-I), sample bottle, six sample tubes, USB cable and wall adapter-all in a sturdy carrying case.

- Waterproof to IP67
- Lithium ion rechargeable battery
- USB port
- 7 languages
- Backlit display
- Tungsten and Infrared

2020i Kit - Order Code 1974-I: Portable turbidity meter complies with ISO 7027 Standard

Mode  Ratiometric Nephelometric  Attenuation 
Unit of Measure
Range 0-1,000 NTRU/FNRU
0-17,500 ASBC
0-250 EBC
0-100 NTU/FNU
0-1,750 ASBC
0-25 EBC
0-2,000 AU/FAU
0-35,000 ASBC, 0-500 EBC
Resolution 0-10.99 NTRU/FNRU: 0.01
11.0-109.9 NTRU/FNRU: 0.1
110-1000 NTRU/FNRU: 1
0-10.99 NTU/FNU: 0.01
11.0-100.0 NTU/FNU: 0.1
0-2000 AU/FAU: 1
Accuracy 0-2.5 NTRU/FNRU: 0.05
2.5-100 NTRU/FNRU: 2%
100-1000 NTRU/FNRU: 3%
0-2.5 NTU/FNU: 0.05
2.5-100 NTU/FNU: 2%
0-2000 AU/FAU:
10 AU/FAU or 6%, whichever is greater
Detection Limit 0.05 NTRU/FNRU 0.05 NTU/FNU 10 AU/FAU
Reproducibility 0.02 NTRU/FNRU or 1% 0.02 NTU/FNU or 1% 1%
Range Selection Automatic
Light Source IR LED 860 nm 10 nm, spectral bandwidth with 50 nm
Detector 2020i: Photodiode, centered at 90 and 180

Meter Features:

Signal Averaging Disabled, 2, 5, 10
Power USB computer cable, wall adapter or Lithium ion rechargeable battery, 3.7V, 2.5" x .75", 1.7 oz
Data Logging 500 points
Auto Shut-Off Disabled, 5, 10, 30 seconds
Languages English, French, Spanish, Japanese, Italian, Portuguese, Chinese
Response Time <2 seconds
Size 7.5 x 3.5 x 2.5 inches; 19.05 x 8.84 x 6.35 cm
Weight 13 ounces
Display 6-line LCD with backlit display

#1974i: 2020I Kit: Portable turbidity meter complies with USEPA 180.1 Standard $1195.00
#1480: Turbidity Standard, 0 NTU/FNU, 60 ml $41.00
#1447: Turbidity Standard, 10.0 FNU, 60 ml
For use with 1974i
#1444: Turbidity Standard, 100.0 FNU, 60 ml
For use with 1974i
#0260-6: Replacement Turbidity Tubes, Pkg of 6 $42.00
#1720: Replacement USB Cable $7.95
#1721: Replacement USB Wall Adapter $23.70


The 2020we meter has been dicontinued and replaced with either the 2020t or 2020i meters listed above.
These solutions and tubes for the 2020we meter (listed below), are not compatible with the newer 2020t and 2020i models (above)

#1970-EPA: 2020we Kit: Portable turbidity meter complies with USEPA 180.1 Standard Discontinued
#1480: Turbidity Standard, 0 NTU/FNU, 60 ml $41.00
#1450: Turbidity Standard, 1.0 NTU, 60 ml $64.00
#1451: Turbidity Standard, 10.0 NTU, 60 ml $64.00
#1452: Turbidity Standard, 100.0 NTU, 60 ml $64.00
#0290-6: Replacement Turbidity Tubes, Pkg of 6 $42.00
#1970-CS: Replacement Waterproof Case, with Pre-Cut Foam for 1970-EPA $95.00
#1720: Replacement USB Cable $7.95
#1721: Replacement USB Wall Adapter $23.70
#3-0038: Replacement Chamber for 2020we $14.50
#1901-CD: Smartlink 3 Software $89.50

turbidity tube

Accurately measures water clarity. Features a clear polycarbonate tube with numeric centimeter scale on the side and a 4.5 cm standard secchi disc design in the bottom of tube. Secchi disc is screwed to a rubber stopper, which can be removed for easy cleaning. Drain hose with finger crimp allows sample to be drawn off until secchi pattern is visible. 60 or 120 cm in length.

#77107: 60 cm Turbidity Tube $71.00
#77096: 120 cm Turbidity Tube $96.00

secchi disk

Used to determine turbidity or degree of visibility in natural waters. The 20 cm (8") diameter discs come with 3/4 lb lead weights. Calibrated line is 20 meters in length.

#171: Black & White Secchi Disk w/o Line $42.00
#171-CL: Black & White Secchi Disk with Line $85.00

secchi disk

Need to determine how clear the water is? Seeing may not be believing! Measure the turbidity or degree of visibility of the water you're testing with our secchi disk.

- 200 mm (7-7/8") diameter acrylic with stainless steel bolt
- Two white, two black quadrants
- Weights and instructions included
- Line not included.

#58-B10: Wildco Black & White Secchi Disk $92.00

calibrated line

This 20 meter, braided, stretch-resistant line has a brass spring clip for easy attachment to samplers, secchi disks, plankton nets or sounding leads. The line wraps conveniently around an ethafoam block, which prevents accidental loss.

#1065: 20 Meter Calibrated Line $62.00
#1064-G: 20 Meter Line with Weight $83.00
#1068: Sounding Weight Only $39.00

turbidity kit

This visual comparison test kit is designed for use in shallow waters where secchi disc depth reading is not feasible. Readings are made by using a standard turbidity reagent to match the turbidity of a water sample. Measurements are expressed in Jackson Turbidity Units (JTU). Reads from 0-200 JTU in 5 JTU steps.

#7519-01: LaMotte Turbidity Test Kit $115.00
#7520-H: Turbidity Refill Reagent, 60 ml $19.80
#7519-L: Turbidity Refill Reagent, 500 ml $67.83

imhoff cone

Fully graduated cone made of styrene-acrylonitrile. It features a low density plug which makes it easy to withdraw sediment. Markings are incremented as follows: 0 to 1 ml by 0.1 ml, 1 to 10 ml by 0.5 ml, 10 to 40 ml by 1.0 ml, 40 to 100 ml by 2 ml, and markings at 250, 500, and 1000 ml.

#0512: Imhoff Cone $69.00
#0672: Imhoff Stand for 1 Cone, Wooden $69.00
#796-02: Imhoff Stand for 3 Cones, Metal Wire Contsruction $79.00
#1086: Imhoff Cone with Wooden Stand $135.00