Extech Portable Turbidity Meter (TB400)

In stock
The TB400 allows the user to test the turbidity of an aqueous sample of only 10mL. It utilizes an LED light source to test a range of 0.00 to 1000 NTU. Ideal for practically any turbidity testing.

Extech Portable Turbidity Meter (TB400)




  • Microprocessor-based circuitry assures high accuracy and repeatable readings
  • Requires only a 10mL sample size
  • 2-point calibration
  • Splash-proof front panel is ideal for field testing applications
  • Battery operated for field and on-site testing
  • Data Hold and Min/Max record/recall
  • Auto power off
  • Complete with 0 NTU standard solution test bottle, 100 NTU standard solution test bottle, cleaning solution (distilled water), (2) test bottles and covers, cleaning cloth, six AAA batteries, and hard carrying case

This portable turbidity meter is designed for field and lab use to determine the turbidity of municipal water, food and beverage water, and other aqueous solutions. It is highly accurate and reliable for determining the clarity of fluid samples far past the point that human eyes can test.

The traditional means of testing turbidity involved lowering a painted disc into a water source and determining the depth at which the disc becomes invisible. This method is highly subjective and impossible with small sample sizes. This meter requires a very small sample (10mL) to provide a highly accurate turbidity measurement.

The TB400 features a wide testing range up to 1000 NTU (Nephelometric Turbidity Unit) with an impressive 0.01 NTU resolution. This makes the TB400 ideal for testing the minute differences in aqueous samples allowing the best course of action to be taken.



  • Range: (NTU) 0.00 to 50.00 NTU, 50 to 1000 NTU (Nephelometric Turbidity Unit)
  • Resolution: 0.01 NTU
  • Accuracy: ±5% FS or ±0.5 NTU, whichever is greater
  • Light source: LED, 850nm
  • Standard: Designed to meet ISO 7027
  • Response Time: less than 10 seconds
  • Dimensions: 6.1 x 3.0 x 2.4" (155 x 76 x 62mm)
  • Weight: 11.3oz (320g)

Unit Ship Weight: 4 lbs


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