Benchtop colorimeter HZSD-29

for color analysisfor the petroleum industryhigh-precision

• Power supply: AC240V, 100W, milk-shell bulb with polished lining, 2750±50K color temperature • Colorimetric tube: Φ32.5–33.4mm inner diameter, 120–130mm height, flat-bottom glass • Standard color disk: 26 light holes (25 color sheets No.1–25, 1 blank) • Light system: filtered through milky and sunlight-filtering glass for north-light spectrum simulation • Optical lenses: convex/concave mirrors for beam adjustment and focusing • Observation: two parallel beams illuminate sample and standard simultaneously • Structure: compact, easy handling, ASTM D1500 compliance The Huazheng HZSD-29 Petroleum Colorimeter determines the color of lubricating oils and other petroleum products in compliance with ASTM D1500. Its optical system filters light through milky and sunlight-filtering glass to simulate natural north daylight, producing two parallel beams that illuminate the sample in the flat-bottom colorimetric tube and the calibrated standard disk simultaneously. Operation is simple: rotate the disk until the sample matches the standard, with results read directly as ASTM color numbers or ranges when intermediate. Compact and durable, the tester is easy to handle and delivers stable illumination and reliable results, even with diluted or opaque samples. Its standardized design makes it ideal for laboratories, refineries, power plants, aviation, and research institutes, providing a precise and consistent method for petroleum color determination.