Geotech Portable Turbidity Meter

The only turbidity meter on the market that is completely waterproof with an IP67 rating.

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  • Overview
  • Features
  • Specifications
  • Applications
  • Support

The Portable Turbidity Meter by Geotech delivers precision, repeatability and is the only turbidity meter on the market that is completely waterproof with an IP67 rating, and can even float in the water with the lid open.

The Geotech Portable Turbidity Meter has been specifically designed for environmental and water quality monitoring, industrial waste water monitoring as well as for various other uses.

The device features include; a large membrane keyboard making the instrument easy to operate even when wearing gloves, a bright display that is easily to read even through varying light conditions, password protection that can limit individual user access to the device for greater security and assurance, multiple calibration modes, long lasting lamps and white light or infrared light source.

The Geotech Portable Turbidity Meter is available in two light source models to fulfil specific customer and site requirements:

·         Model GTW: White Light source, compliant to US EPA method 180.1

·         Model GTI: Infrared light source, compliant to ISO 7027 standards


For more information on the Geotech Portable Turbidity Meter, contact your local Air-Met office. 

Features & Benefits

  • Sealed data port/power supply (serial output, USB to Mini-B cable not included)
  • Sealed battery compartment
  • IP67 water proof and floats in water
  • Long lasting lamps
  • Shock proof
  • Bright digital display and large keypad
Geotech Portable Turbidity Meter Specifications
Measurement Method Nephelometric
EPA method 180.1
ISO method 7027
Light Source
EPA - White light Tungsten
ISO - 860nm LED
Range 0 to 1000 NTU (FNU)
Accuracy ±2% of reading plus stray light
±1% of reading, or 0.01 NTU (FNU),
whichever is greater
Resolution 0.01 NTU (FNU) on lowest range
Unit of Measure NTU, FNU, EBC
Stray Light <0.02 NTU (FNU)
Signal Averaging
Selectable On/Off
(progamable from 8 to 100 readings/4 to 27 seconds)
Detector Silicon photocell
Reading Modes Fast Settling, automatic, manual reading, EBC
Data Logger 1000 Data Sets
Download Standard USB
Languages English, Spanish, Portuguese
4 AA batteries
USB 5 VDC/500 mA
Operating Temperature 32 to 122°F (0 to 50°C)
Storage Conditions -40 to 140°F (-40 to 60°C), instrument only
Instrument Enclosure Rating IP67 with lid open or closed
Sample Required 0.473 oz. (14ml)
Sample Cells 2.55 x 0.94 in. (65 x 24 mm)
Dimensions 4.48 x 7.79 x 3.26 in. (114 x 198 x 83 mm)
1.09 lb. (496 g) without batteries
1.28 lb. (585 g) with 4 AA alkaline batteries
Certification CE
Warranty 2 year


  • Environmental monitoring, water quality
  • Industrial waste water monitoring, compliance
  • Process instrumentation verification
  • Drinking water quality testing
  • Laboratory sample analysis
  • Other industrial: beverage, electroplating, petrochemical, pulp and paper
  • Storm water monitoring