https://v.youku.com/v_show/id_XNDg3NDQ4ODcxNg==.html

 The LH-221 is two high-precision parallel light source transmittance meters. The LH-220 is used for visible light (VL) transmittance testing, while the LH-221 is used for transmittance testing in three bands: ultraviolet (UV), visible light (VL), and infrared (IR). The instrument is based on optical principles.

Instrument Features

1.  Real-time measurement: place and measure immediately, no need to press buttons or wait.

2. High measurement accuracy, fast speed, and simple operation.

3. Parallel optical path design allows measurement of thick materials.

4. Detachable probe with fixed bracket, supporting both fixed and detachable testing methods.

5. Alarm function: preset qualified range, with audible alarm when exceeding standards.

6. Can record 100 sets of measurement data, automatically calculate maximum, minimum, and average values.

7. Optional transmittance and shading rate measurement modes.

8. Comes with computer software; when connected to a computer, it enables automatic testing,超標(biāo)告警、數(shù)據(jù)統(tǒng)計(jì)、數(shù)據(jù)保存，

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View bar charts, curve graphs, and print test reports.

9.Automatic calibration on startup and manual calibration.

10.Bilingual menu in Chinese and English.
11. Large LCD screen display, intelligent backlight, automatic shutdown when not in use.
12. Equipped with a high-grade aluminum case and EVA lining for safe and convenient portability.

Technical Parameters

1. Light source wavelength:

LH-220: UV: None      VL: 380-760nm    IR: None

LH-221: UV: 365nm   VL: 380-760nm     IR: 940nm
2. Measurement range: 0—100%
3. Resolution: 0.1%
4. Measurement error: ≤1%
5. Measurement thickness: ≤50mm
6. Sample area: ≥3*3mm

7. Main unit dimensions: 132x71x29mm
8. Handle dimensions: Φ34*75mm

9. Bracket dimensions: 91*45*70mm

10. Aluminum case dimensions: 340*240*100 mm

11. Power source: AAA (Size 7)* 4

12. Operating environment: T&H 0-40℃ ≤85%