WF28 colorimeter with competitive price, has these advantages of being easy to operate, easy to understand, affordable and so on. WF28 only have one measuring light source (D65); Two kinds of color modes (CIE1976LAB, CIELCH); One color difference formula (Delta E * ab); Two language pattern (Simplified Chinese and English), and a universal measuring caliber (8MM). WF28 colorimeter can store 100 standard data and 20000 sample data, you can also add mini-printers to do real-time printing measurement data. It can't operate with "color analysis system" software functions. WF28 colorimeter detailed parameters as follows:
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| Model | Â WF28 |
| Display Mode | Â CIELAB\CIELCH |
| Color Difference Formula | Â Delta E * ab |
| Illumination Condition | Â CIE Recommendation:8/d |
| Light Source | Â LED blue excitation |
| Sensor | Â Photodiode array |
| Measurement Caliber |  φ8mm |
| Measurement Condition |
 Observer:CIE 10° Standard observer  Light source: D65  Contain light way:SCI SCE |
| Measurement Range | Â L: 0 to 100 |
| Repeated Accuracy | Â Delta E<0.07 (take the deviation average after 30 times measuring the whiteboard) |
| Table Difference | Â Delta E<0.2 |
| Measurement Interval | Â 0.5 Sec. |
| Storage Capacity |
 Type sample data : 100 with testing sample data: 200  |
| Language Patterns | Â Simplified Chinese |
| Battery Charging Time | Â 8 hrs |
| Battery | Â Li-ion battery, 5000 times Measurement |
| Lifetime of Bulb | Â 5 years more than 1.6 million measurements |
| Display Screen | Â TFT true color 2.8inch@(16:9)Â Resolution ratio:400x240 |
| Interface of External | Â RS-232 (115200bps)- connected with micro printer |
| Working Temperature Range | Â 0 degree-40 degree(32 fahrenheit -104 fahrenheit ) |
| Storage Temperature Range | Â -20 degree-50 degree(-4 fahrenheit -122 fahrenheit ) |
| Humidity Range | Â Relative humidity less than 85%,without condensation |
| Weight | Â 700g |
| Size | Â 199*68*90mm |
| Size of Exterior Package | Â 400*240*340mm |
| Standard Accessories | Â 3000mAH Li-ion battery/AC adapter/User manual/Warranty card |
| Optional Accessories | Â Flour measuring device/Liquid measuring device/Micro printer |
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