Colorimeters
Instruments that measure light absorbance of a sample, and are based on the Beer-Lambert law, which states that the concentration of a solute is proportional to the absorbance of the sample. Available in benchtop and portable configurations.
What Is a Colorimeter?
A colorimeter measures the amount of light that passes through the solution as compared to the light that would pass through a pure solvent.
A photocell detects the amount of light passing through the solution and converts the light to an electrical signal. Higher concentrations and colors increase light absorption and the current produced by the photocell.
What Types of Colorimeters Are There?
Colorimeters may be visual or photoelectric. Visual colorimeters may be visual absorption meters or color comparators or true visual or tristimulus colorimeters.
Visual colorimeters compare the color of the test sample with a standard. These instruments are used for chemical analysis, determining concentration, or grading based on color. A tristimulus colorimeter works on the principle of visual equivalence and is more commonly used to monitor production of colored objects.
Photoelectric colorimeters can measure colors directly using filters and photoelectric cells. Light reflected or transmitted from the object passes through various filters to reach the photon detectors.
How Are Colorimeters Used?
Many scientific colorimeters are designed to measure single or multiple parameters like chlorine that are frequently tested in drinking water, wastewater, food and beverages, aquaculture, and agriculture. Colorimeters are also used to objectively measure the color of beers, malts, and caramels and industrial, mineral, and edible oils, fats, waxes, petrochemicals, and surfactants.
Thermo Scientific™ Orion™ AQUAfast™ AQ4000 Colorimeter and Accessories
Measure common water and wastewater parameters using this colorimeter with 65 pre-programmed methods and auto-test ampoule compatibility.
Lovibond™ PFXi-195/9 Colorimeter: Transparent Samples
Accurate, efficient automatic colorimeter for objective color measurement of transparent liquids
Thermo Scientific™ Orion™ AQ3700 AQUAfast™ Colorimeter
Select this multiparameter colorimeter to manage your water and wastewater analysis using over 90 preprogrammed methods.
Lovibond™ 711 Nesslerizer Systems
Designed for measuring unsaturated samples that are below the sensitivity of a normal, hand-held comparator system
Lovibond™ MD600 Handheld Water Quality Colorimeter
Rugged, waterproof multi-parameter colorimeters for laboratory and field testing
Lovibond™ PFX-880L Colorimeter: Oils, Fats, Waxes and Transparent Liquids
High-precision, automatic spectrophotometer for objective color measurement
Lovibond™ EC 2000 PT-CO EComparator
Provides an easy way to transition from subjective visual measurement to a nonsubjective, accurate electronic measurement.
YSI™ pHotoFlex™ Colorimeters
Waterproof, multiparameter colorimeters are ideal for laboratory and field testing
YSI™ 900 Chlorine Colorimeter
For the measurement of Total chlorine or Free chlorine in field or lab
Lovibond™ EC 3000 Saybolt EComparator
Provides an easy way to transition from subjective visual measurement to a non-subjective, accurate electronic measurement.
Thermo Scientific™ Orion™ AQUAfast™ AQ3140 COD Colorimeter
Designed for the laboratory, this COD colorimeter is a single parameter instrument for determining chemical oxygen demand index in water for markets such as wastewater, food & beverage, aquaculture, and agriculture.
Lovibond™ Model F Colorimeter
Versatile instrument for color measurement of products that transmit light as well as opaque solids, powders and pastes
Lovibond™ Gardner Color Scale Based on Comparator System 2000
A flexible, modular system for visual color grading.
Lovibond™ EC 2000 Gardner EComparator
Provides an easy way to transition from subjective visual measurement to a non-subjective, accurate electronic measurement.