LimsPulse
Petroleum testing

Cloud and Pour Point Apparatus

Cools a fuel or oil in a standard glass test jar through a series of cold baths and examines it at set intervals. The cloud point is where wax crystals first appear; the pour point is the lowest temperature at which the sample still flows.

  • Petroleum refining
  • Lubricant blending
  • Fuel distribution in cold climates
  • Crude oil production and pipelines
  • Independent testing laboratories
Illustration of Cloud and Pour Point Apparatus
PREVENTIVE MAINTENANCE

Maintenance checklist

Daily

  • Check bath temperatures and coolant levels
  • Wipe condensation and frost from lids and jackets

Weekly

  • Check corks, discs and gaskets; replace if soaked or worn
  • Clean optical windows on automatic units

Monthly / per SOP

  • Run a check sample with known cloud and pour points
  • Defrost baths if ice builds up

Annual

  • Calibrate or verify thermometers (ice point and reference comparison)
  • Service refrigeration unit
  • Verify automatic detection against the manual method
SAFETY

Safety precautions

Before you work on the Cloud & pour point tester
  • Cold baths and jackets at −30 °C to −70 °C can cause cold burns; wear insulated gloves and safety glasses.
  • Alcohol or other low-temperature coolants are flammable; keep ignition sources away and keep baths covered.
  • Fuels and solvents are flammable; pre-heat pour point samples in a controlled bath or oven, never over an open flame.
  • If mercury thermometers are used, have a mercury spill kit available; prefer digital probes where the method permits.
  • Ensure refrigeration units are well ventilated and electrically safe around spilled coolant.
In LimsPulse · Calibration Management

Keep every Cloud & pour point tester in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.

See how