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Koehler - Corrosion Tester - Dual Corrosion Tester

Consists of two heat-transfer corrosion cells with temperature and pressure controls for evaluating engine coolant samples in accordance with ASTM D4340. Maintains aluminum alloy specimens at constant temperature in the presence of 500 mL samples. Each corrosion cell includes a borosilicate glass test cell, heat transfer bar, aluminum test specimen with thermocouple port, Type J thermocouple, 950W band heater, pressure gauge, pressure relief valve, stainless steel end plates with support rods, fill plug and o-rings, and acrylic safety shields. Digital temperature controllers maintain specimens at temperatures of up to 210 ± 1°C throughout the test period. Test cells are mounted on a finished steel base. Controls are housed in a separate finished steel cabinet.

Provides a laboratory screening procedure for evaluating the corrosion preventing capabilities of engine coolants under heat transfer conditions that may be encountered in aluminum cylinder head engines. Corrosion preventing effectiveness is determined by the change in weight of an aluminum alloy test specimen after an extended period at elevated temperature in the presence of a coolant sample.



  • Conforms to ASTM D4340 specifications
  • Operating range to 210°C


Conforms to the specifications of ASTM D4340
Test Capacity 2 coolant samples
Maximum Temperature 210 ± 1°C
Net Weight 190 lbs (86.2kg)
  • Chemical
  • Education & Academics
  • Environmental
  • Oil & Gas
Koehler Instrument CompanyProviding quality testing instrumentation and technical support services for research and testing laboratories has been our specialty since 1925. Meeting your testing needs is the primary focus of our business, which is why Koehler Instrument Company is a leading producer and supplier of petroleum, synfuels and petrochemical instrumentation worldwide. At Koehler, we pride ourselves in innovation. In a time of continuous technological advancement and transition we are constantly implementing new and improved ways to surpass the needs of an ever-evolving industry. Koehler products are backed by our staff of technically knowledgeable, trained specialists who are experienced in both petroleum products testing and instrument service, which is carried out either on site or at a Koehler service center.
[koehler instrument, ASTM compliance, petroleum products, petroleum testing, Corrosion tester, Dual Corrosion]