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ASTM D1122 Lab Density or Relative Density of Engine Coolants Tester. ASTM D1122 Compliance: Developed in combination with national standards and ASTM standards for accurate testing. Safety Protection: Equipped with overheating protection and low water level alarm for safe operation. Efficient Cooling: Fully enclosed compressor refrigeration with noiseless circulating pump. Lifetime Support: Free lifetime online technical services and 1-year equipment warranty. Customization Available: Supports customized machines and logo printing according to specific requirements.