AMCO Clear


Primary Standard Turbidity Meter Calibration Kits include 250 mL bottles of each NTU value at the manufacturer's suggested calibration points.

Secondary Standard Turbidity Meter Kits include sealed vials of the NTU values at the manufacturer's suggested calibration points.

Deluxe Turbidity Standard Kits will contain the 250 mL bottles of primary standards and the corresponding sealed secondary standards at the manufacturer's suggested calibration points. This will also include a new sample vial.

Linear Calibration Standard Kits contain 125 mL bottles of primary standard in the range of your application, 0-1, 0-10, and 0-100 NTU ranges include 6 bottles at 0%, 20%, 40%, 60%, 80^% and 100% of the range of interest. Directions and graph paper are included upon request.


Primary Standards are available in 125, 250, 500 mL, 1 L, and 1 Gallon bottles and are instrument specific, formulated to match Formazin dilutions.

Secondary Standards are primary standard suspensions contained in a sealed vial/bottle and used for daily instrument calibration verification.

Best Seller is a low level check standard to verify instrument calibration in the drinking water range of interest.

Reference Information

HF Scientific Reference Items

HF Scientific Reference Brochure

AMCO turbidity standards are instrument specific. Find the Right AMCO product to match the HF Scientific instrument you have by clicking here and downloading our brochure.

Hach Instrumentation

Hach Reference Brochure

Hach turbidity meters are common instruments in any lab. If you are looking for an alternative product, download our new brochure to help you find the correct item for your application and instrument.

LaMotte Reference Brochure

Using a LaMotte instrument and searching for the correct turbidity standard? Try GFS Chemicals AMCO Clear as your go-to option with our superior quality and competitive pricing.