Specification Brand : VTSYIQI BulletPoint1 : ★ Portale: Structure Design in line with Ergonomics,and easy-to-use Operation.English operating system BulletPoint2 : ★ Precison: Precison measurement performance with core technological competence. BulletPoint3 : ★ Measuring Aperture: Φ4mm, High repeat accuracy: ΔE <0.05 BulletPoint4 : ★ Analysis the best assistant of the color, the simplest operation chromatic meter BulletPoint5 : ★ Through the SCM test, New optical structure to achieve a more stable measurement Color : One Color ExternallyAssignedProductIdentifier : 7509100544436 IncludedComponents : MAIN HOST ItemName : VTSYIQI Digital Colorimeter Color Meter Colour Difference Meter with Switchable Caliber 4mm Caliber CIELAB CIELCH D50 D65 F11 Three Light Sources TFT True Color 2.8inch Display ItemPackageDimensions_Height : 35 centimeters ItemPackageDimensions_Length : 40 centimeters ItemPackageDimensions_Width : 24 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : science-lab-colorimeters Manufacturer : VTSYIQI202411151416411VTSYIQI ModelNumber : VTSYIQI202411151416411VTSYIQI NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : VTSYIQI202411151416411VTSYIQI ProductDescription : colorimeter 4mm diameter version is a specially designed, especially for a small area, arc and other special surface type measuring cost-effective precision colorimeter. In a small device, small parts, arc exceptional color quality of face detection to bring great convenience for the user. Technical Specifications Model Number: WF30 Display mode: CIELAB,CIELCH Color difference formula: ΔE *ab Illumination Condition: CIE Recommendation:8/d Light Source: The LED blue light excitation Sensor: Photodiode array Measuring Aperture: Φ4mm Measuring Condition: Observer:CIE 10° Standard observer, Light source: D65 D50 F11 (TL84), Contain light way:SCI SCE Measuring Range: L:0-100 Repeated Accuracy:ΔE<0.05(take the deviation average after 30 times measuring the whiteboard) Table Difference: ΔE <0.2 Measurement Time: 0.5 second Storage Capacity: 100 standard samples and 20000 test sample Battery Power supply: Li-ion battery, (Battery not included in the package)5000 times Measurement Lifetime of Bulb: 5years more than 160 million measuring Display screen: TFT true color 2.8inch@(16:9) Resolution ratio:400x240 Interface of External: USB2.0 (USB-B)-DATA communication with "color analysis system" software RS-232 (115200bps)- connected with micro printer Working Temperature Range: 0°C-40°C (32°F-104°F) Storage Temperature Range: -20°C-50°C (-4°F-122°F) Humidity Range: Relative humidity less than 85%,without condensation Net Weight: 700g Dimension: 199x68x90mm Demension after package: 400x240x340mm