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Koehler™ Instrument Constant Temperature Water Bath

Koehler K25900 Constant Temperature Pressure Hydrometer Water Wath lets you measure density and relative density of light hydrocarbons, including LPG, when used for transportation, storage and regulatory purposes. The measurement is made by floating a thermohydrometer in a sample that has been introduced into a pressure cylinder.

Manufacturer:  Koehler™ Instrument KOEK25900

Catalog No. KL-K25900

Please call Customer Service at 1-800-234-7437 or send an email to help@thermofisher.com for assistance.



  • Immerses two Pressure Hydrometer Cylinders at 60°F (15°C) for density and relative density determinations of LPG and other light hydrocarbons
  • Mechanically refrigerated cooling system maintains sub-ambient temperature
  • Thermistor activated solid state temperature controller and 750W copper immersion heater maintain bath temperature with ±0.5°F (±0.2°C) stability
  • A 1/20 hp ball bearing stirrer circulates the bath medium to assure temperature uniformity
  • Stainless steel tank is fiberglass insulated
  • Equipped with overflow standpipe/drain. Steel exterior has a durable polyurethane enamel finish


15°C (60°F)
Stainless steel with fiberglass insulation
ASTM D1657; IP 235; ISO 3993
30 x 46 x 56cm (12 x 18 x 22 in.)
46 x 51 x 124cm (18 x 20 x 49 in.)