How do you choose between a spectrophotometer and a colorimeter? A selection checklist for benchtop vs. portable models.

Choosing the wrong color measurement instrument renders quality control efforts futile. Many factories struggle to distinguish between spectrophotometers and colorimeters, or to decide whether a benchtop or portable model is the right fit. Selecting the wrong device not only drives up costs but can also lead to inspection disputes with customers. This article explains the differences between these instruments and guides you on how to make the right choice.

I. Core Principles: Spectrophotometer vs. Colorimeter

    Colorimeter: Simulates the three types of photoreceptor cells in the human eye to directly measure RGB or L*a*b* color difference values. Characteristics: Affordable and extremely easy to use; ideal for quick pass/fail assessments but cannot provide spectral curves or support color formulation development. 

    Spectrophotometer: Measures the spectral reflectance or transmittance of a sample across the entire visible light spectrum (360–780 nm). Characteristics: High precision; capable of detecting metamerism and accurately transmitting data across the supply chain.

II. Practical Selection: Benchtop vs. Portable Checklist

Evaluate based on application scenarios, sample form, and precision requirements:

    How to choose:

    Consider form: For liquids, powders, films, or transmittance measurements, choose a benchtop model. For large items, irregularly shaped objects, or mobile spot-checks on the production line, choose a portable model. 

    Consider purpose: For routine color difference comparisons, choose a portable colorimeter or spectrophotometer. For color formulation or high-precision R&D, choose a benchtop spectrophotometer. 

III. Reference to Industry Standards

Accurate color measurement requires adherence to authoritative international and national standards:

CIE 15 / ISO 7724: Colorimetry

ASTM E1164: Standard Practice for Obtaining Spectrophotometric Data for Object-Color Evaluation

GB/T 3978: Standard Illuminants and Geometric Conditions

IV. CHNSpec Product Solutions

    CHNSpec offers professional color measurement instruments covering a full range of scenarios to meet diverse industry and measurement needs:

    Portable Choice | DS-700C-1 / DS-700 Series Portable Spectrophotometers:

    Features multiple measurement apertures with repeatability of ΔE*ab ≤ 0.02.

    Equipped with a built-in camera for targeting; designed specifically for complex on-site measurements and irregularly shaped objects.

    Laboratory Benchmark | CS-820P / CS-821N / CS-826 High-Precision Benchtop Spectrophotometers:

    Supports both reflectance and transmittance measurements; ideal for samples such as liquids, films, transparent plastics, and powders.

    Features built-in temperature and humidity compensation and full-spectrum measurement capabilities, ensuring data seamlessly aligns with major international brands.

V. Conclusion

Selecting color measurement equipment requires careful consideration of measurement accuracy, sample form, and usage scenarios. Choose portable models for routine spot checks and benchtop models for laboratory R&D; select a standard color difference meter if only color difference data is needed, but opt for a spectrophotometer for color formulation and high-standard color quality control.