Turbidity Meters - Page 6

Manufacturer: ScienceFirst Brand: Science First

Measure turbidity in streams where a Secchi disk cannot be used. Clear polycarbonate tube has a 4.5 cm diameter Secchi disk design on the bottom. Drain the tube with hose and finger clamp. Longer length meets requirements of GLOBE. Image may vary.

Manufacturer: LaMotte Brand: LaMotte Model: 0641

Turbidity meters use light reflection to detect the presence of matter in a liquid substance. They are commonly used for water testing, and to test for bacteria and other growth in the food and beverage industries and in environmental applications.LaMotte manufactures analytical reagents, portable water testing instrumentation, and microbiological testing products. The company, founded in 1919, is headquartered in Chestertown, MD.

Manufacturer: COLE-PARMER Brand: GF Signet

science-lab-turbidity-meters

Manufacturer: COLE-PARMER Brand: Cole-Parmer

Primary Standard Solutions can be used to calibrate nephelometers or turbidimeters. EPA-approved polymeric standards outlast Formazin standards. Suspended polymeric particles virtually never settle or clump. Solutions are guaranteed to maintain NTU values within ±1% for one year. Available in one-liter bottles. Ensure accurate readings by calibrating your turbidimeter

Manufacturer: Thermo Scientific

Manufacturer: Thomas Scientific Brand: WTW Model: 600560

Nephelometric or transmittance measuring-the nephelometric measurement at 90° scattered light is advantageous for lower turbidity, whereas the transmission measurement at 180° is beneficial for medium to high turbidity values: With increasing turbidity, restray and scattering effects between particles are growing bigger. The reduction of light intensity in this case leads to a more accurate result than a 90° nephelometric measurement. Therefore, lab meters for high values are equipped with several measuring options: ratio modes calculate the final result from different measured angles. For ratiometric measurements, there is no specific standard method to be followed; rather, procedures are established by the application or industry. White light has a higher sensitivity for small particles, however, the inherent coloration of the solution has a stronger disturbing effect in this case. The IR measurement is required by DIN ISO, the white light measuring by US EPA.

Manufacturer: COLE-PARMER Brand: Cole-Parmer

Kits include a 250-mL bottle of primary standard, a secondary standard-filled cuvette for each of the NTU values listed, and two empty glass cuvettes. All cuvettes are designed to fit your brand-name meter.

Manufacturer: COLE-PARMER Brand: HF Scientific

Turbidity standards for validation and calibration of MicroTol on-line turbidimeter Typically around 7 NTU Complies with US EPA Method 180.1

Manufacturer: COLE-PARMER Brand: GF Signet

science-lab-turbidity-meters

Manufacturer: Thomas Scientific Brand: WTW Model: 251301

Nephelometric or transmittance measuring-the nephelometric measurement at 90° scattered light is advantageous for lower turbidity, whereas the transmission measurement at 180° is beneficial for medium to high turbidity values: With increasing turbidity, restray and scattering effects between particles are growing bigger. The reduction of light intensity in this case leads to a more accurate result than a 90° nephelometric measurement. Therefore, lab meters for high values are equipped with several measuring options: ratio modes calculate the final result from different measured angles. For ratiometric measurements, there is no specific standard method to be followed; rather, procedures are established by the application or industry. White light has a higher sensitivity for small particles, however, the inherent coloration of the solution has a stronger disturbing effect in this case. The IR measurement is required by DIN ISO, the white light measuring by US EPA.