Koehler K56190 Oxidation Stability Apparatus (Cigre Bath)

Spesifikasi Koehler K56190 Oxidation Stability Apparatus (Cigre Bath)


Constant temperature aluminum block type bath for oxidation stability tests in accordance with the Institute of Petroleum (IP) testing methods. Accommodates twelve sets of oxidation and absorption tubes. Insulated block bath operates efficiently at temperatures of up to 200°C (392°F). Microprocessor PID control provides quick temperature stabilization without overshoot, and the bath is protected by a an overtemperature control circuit that interrupts power should block temperature exceed a programmed cut-off point. Dual LED displays provide actual and setpoint temperature values in °C/°F format. Communications software (RS232, etc.), ramp-to-set and other enhanced features are available as extra cost options. Contact your Koehler representative for information. A bank of twelve flowmeters on a movable stand regulates oxygen flow at 1 ±0.1L/h to each oil sample per IP specifications. Includes soap bubble flowmeter for checking oxygen flow rate.

Test Method

Oxidation stability is determined by exposing the sample to a measured oxygen flow at elevated temperature in the presence of metal catalysts.


  • Conforms to IP specifications
  • Twelve-sample testing capability
  • Microprocessor programmable high accuracy temperature control


Conforms to the specifications of: 

IP 48, IP 280, IP 306, IP 307, IP 335

Testing Capacity: Twelve samples

Temperature Range: 80 to 200°C

Temperature Uniformity: ±0.2°C

Air Flow Control:

Standard Model: 1L/h to each sample
IP 48 Model: 15L/h to each sample

Additional Accessories

  • K56110 Set of Glassware - Includes one each oxidation and absorption tube. For IP 48, IP 280, IP 306, IP 307, IP 335 
  • 250-000-09C ASTM 9C Thermometer - Range: –5 to +110°C (equivalent to IP 15C Thermometer) 
  • 250-000-41C ASTM 41C Thermometer - Range: 98 to 152°C (equivalent to IP 81C Thermometer)

Included Accessories

  • Soap Bubble Flowmeter

Electrical Requirements

115V 60Hz, Single Phase, 12.1A
220-240V 50/60Hz, Single Phase, 6.3A

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