Colorimeter (Digital)

A digital calorimeter is an electronic instrument used to measure the amount of heat absorbed or released during a chemical reaction, particularly in colorimetric analysis.

Parameter Typical Specification

Measurement principle Colorimetric / photometric measurement

Light source LED or tungsten lamp

Detector Silicon photodiode / photodetector

Wavelength range Approximately 400–700 nm (model dependent)

Wavelength selection Filter wheel or selectable optical filters

Display Digital LCD/LED display

Measurement modes Absorbance (OD) and % Transmittance

Absorbance range Typically 0–2.0 or 0–3.0 AU

Photometric accuracy Typically ±1% or better

Resolution Around 0.001–0.01 AU

Sample holder Cuvette/test-tube holder

Sample volume Usually about 1–5 mL, depending on cuvette

Power supply 230 V AC, 50 Hz or rechargeable/battery option

Operation Microprocessor controlled

Calibration Blank/zero calibration using reference solution

Applications Chemistry, biochemistry, pharmacy, medical and educational laboratories