• Evaporation Loss Test Bath

Evaporation Loss Test Bath


Evaluates the potential for evaporation loss of lubricant components in high-temperature service. A controlled flow of heated air is passed over the sample for a specified period. Evaporation loss is measured by the change in sample weight during the test. The Evaporation Loss test can also be used for Estimating Apparent Vapor Pressures and Molecular Weights of Lubricating Oils (ASTM D2878).

  • Conforms to ASTM D972, D2878 and related specifications
  • Two-sample testing capability

Evaporation Cell – Suitable for evaporation loss tests on lubricating greases and oils in the temperature range of 210 to 300°F (99 to 149°C). Passes heated air over the sample at the required flow rate. Consists of stainless steel body, cover, eduction tube and hood. Calibrated flowmeter with needle valve maintains 2L/min air flow at standard temperature and pressure. Supplied with stainless steel grease or oil sample cup. Sample cups are interchangeable. Entire assembly mounts in Evaporation Loss Test Bath. 


Evaporation Loss Test Bath – Constant temperature oil bath mounts two Evaporation Cells in an upright position at the proper immersion level. Maintains test temperature within ±1°F (±0.5°C). Microprocessor PID control provides quick temperature stabilization without overshoot and the bath is protected by an over-temperature control circuit that interrupts power should the bath 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. Fully insulated, double-wall construction with stainless steel tank and polyurethane-finished steel exterior.

  • Support Clamps (2)
  • Thermometer Holder

Conforms to the specifications of:  

ASTM D972, D2878; IP 183; FTM 791-351

Capacity: 2 oil or grease samples

Maximum Temperature: 350°F (177°C)

Temperature Control Stability: ±1°F (± 0.5°C)

Circulation: 1⁄20hp stainless steel impeller

Bath Medium: 5.3 gal (20L) high-temperature transfer fluid

  • 115V 60Hz, Single Phase, 8.6A
  • 220-240V 50/60Hz, Single Phase, 4.5A

    Diaxh,in.(cm): 33w" x 25 1⁄2"h (84x65cm)

    Maximum width with two evaporation cells inserted

    Net Weight: 38 lbs (17.2 kg) 

    Shipping Weight: 66 lbs (29.9 kg)

    Dimensions: 28x24x33 in. (71.1x61.0x83.82.8 cm)

    • K29500 Evaporation Test Cell with Grease Cup 
    • K29550 Evaporation Test Cell with Oil Cup
    • 250-000-22F ASTM 22F Thermometer - Range: 204 to 218°F
    • 250-000-22C ASTM 22C Thermometer - Range: 95 to 103°C
    • 250-000-67F ASTM 67F Thermometer - Range: 203 to 311°F
    • 250-000-67C ASTM 67C Thermometer - Range: 95 to 155°C
    • K29530 Oil Sample Cup with Hood
    • K29540 Grease Sample Cup with Hood