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Koehler K12201 Oxidation Stability Apparatus Solid Block 12-Place
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Last Updated
31 Oct 2019
Country Origin
United States
Minimum Order
1 unit

Specification of


Constant temperature aluminum block oxidation bath with flowmeters and condenser water manifold for twelve cells. Insulated solid block design provides efficient operation at temperatures of up to 450°F (232°C). Microprocessor temperature control unit features digital setpoint and display and built-in overtemperature protection. Includes individual flowmeters and control valves for each cell, delivering air flow at the rate of 3L/h. Condenser water manifold has individual control valves for each cell. Order oxidation cell glassware and accessories separately.

Test Method

The K12201 evaluates oxidation stability by subjecting the sample to a temperature of 95°C in the presence of oxygen or dry air. For inhibited mineral oils, the sample is reacted with oxygen in the presence of water and an iron-copper catalyst.


  • Accommodates twelve oxidation cells
  • Microprocessor digital temperature control
  • Conforming to ASTM and related test method specifications
  • Special baths for ASTM D2893 and AOCS CD12-57 tests


Conforms to the specifications of: ASTM D943, D2274, D2893*, D4310, D6158; AOCS CD12-57*; DIN 51586, 51587; ISO 4263, 12205; NF M 07-047; NF T 60-150

Testing Capacity: 12 oxidation cells

Maximum Temperature: 450°F

Temperature Control Stability: ±0.2°F (±0.1°C)

Air Flow Rate: 3L/h

Additional Accessories

  • K12281 Oxidation Cell Assembly for ASTM D943 and D4310 - Includes oxidation cell, condenser, oxygen delivery tube, thermometer bracket, oil level indicator strip, syringe sampling tube, sampling tube holder, spacer, PTFE stopper and O-rings
  • K122-0-18 Oxygen Delivery Tube
  • K122-0-19 Oxidation Test Tube
  • K122-0-20 Condenser
  • K122-0-21 Thermometer Bracket
  • K122-0-22 Oil Level Indicator Strip
  • K122-0-23 Syringe Sampling Tube Holder
  • K122-0-27 PTFE Stopper
  • K122-0-28 Syringe Sampling Spacer
  • K122-0-30 Syringe Sampling Tube
  • AS568-009-V14 O-rings
  • K12210 Catalyst Coil - Low-metalloid steel wire and electrolytic copper wire wound in a double spiral conforming to ASTM specifications. Packed in a sealed glass tube with a nitrogen atmosphere. Ready for use.
  • K24000 Wire Coiling Mandrel - Mounts on bench for winding steel and copper wire into catalyst coils meeting ASTM specifications.
  • K12250 Steel Wire - Low metalloid steel wire, 0.0625" (1.59mm) diameter, for catalyst coils. Supplied in 1000 ft (304.8m) lengths.
  • K12260 Copper Wire - Electrolytic copper wire, 0.064" (1.63mm) diameter, for catalyst coils. Supplied in 1000 ft (304.8m) lengths.
  • 380-100-001 Silicone Carbide Paper - Used to polish steel and copper wire prior to winding into catalyst coils. 100 grit.
  • 250-002-001 Oxidation Cell Thermometer - Range: 80 to 100°C. For ASTM D943 and D4310.
  • 250-000-40C ASTM 40C Thermometer - Range: 72 to 126°C. For constant temperature baths.

Electrical Requirements

220-240V 50/60Hz, Single Phase, 16A

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