K12100 Oxidation Stability of Mineral Insulating Oils


Test Method
Determines oxidation stability of mineral transformer oils by measuring the amount of sludge and acid formed under prescribed accelerated aging conditions.

Features and Benefits
• Conforms to ASTM D2440 specifications

• Microprocessor temperature control with digital display and overtemperature cut-off

• Six-sample testing capacity


K12100 Oxidation Stability of Mineral Insulating Oils
Constant temperature oil bath for testing oxidation stability of mineral insulating oils. Immerses six oil receptacles at the required depth per ASTM specifications at 110C 0.5C, and controls oxygen flow to each sample at the rate of 1L/h 0.1L/h through six independent flowmeters mounted on a common manifold. Insulated double-wall stainless steel bath has microprocessor temperature control with C/F switchable digital setpoint and display. Operator and equipment are protected by an overtemperature control circuit which automatically interrupts power to the unit when bath temperature exceeds a programmed cut-off point. Communications software (RS232, etc.), ramp-to-set and other enhanced features are available as extra cost options. Contact your Koehler representative for information. Order bath thermometer drying tower and catalyst separately.

Conforms to the specifications of: ASTM D2440

Capacity: Six samples

Temperature Range: ambient to 260F (127C)

Circulator: 1/20hp impeller

Bath Capacity/Medium: 2.5 gal (9.5L) white technical oil

Electrical Requirements
115V 50/60Hz, Single Phase, 8.1A
220-240V 50/60Hz, Single Phase, 4.2A

Included Accessories
Oil Receptacle and Head (6)

Dimensions lxwxh,in.(cm)
14x15x22 (36x38x56)
Net Weight: 31 lbs (14.1kg)

Shipping Information
Shipping Weight: 61 lbs (27.7kg)
Dimensions: 14.4 Cu. ft.

Ordering Information



Product Description

Electrical Requirements


Oxidation Stability Apparatus

115V 50/60Hz


Oxidation Stability Apparatus

220-240V 50/60Hz




Product Description


Copper Catalyst Coils
Sealed in a glass jar with a nitrogen atmoshpere. Pack of 24 (12 sets).


Drying Tower, 250mL
With ground glass stopper and side tubes.


Glass Filter Crucible


ASTM 95C Thermometer
Range: 100 to 130C


White Technical Oil.
1 gal container.


When inquiring about NIST traceable certified thermometers, please refer to the catalog number for the corresponding thermometer and replace the middle three zeros in the catalog number with 004. Example: 251-000-01C ASTM 1C Thermometer would be 251-004-01C ASTM 1C Certified Thermometer.