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
CALIBRATION

Cloud & pour point tester calibration procedures

Thermometer verification

Checks the cloud and pour point thermometers (or digital probes) at the ice point and against a calibrated reference thermometer at low temperatures.

Open procedure
QUALIFICATION

Instrument qualification (DQ · IQ · OQ · PQ)

  1. 01

    DQ — Design qualification

    Defines methods (ASTM D2500, D97, ISO 3015/3016, IS 1448 Part 10), lowest temperature needed, number of baths, manual or automatic detection, and coolant type.

  2. 02

    IQ — Installation qualification

    Confirms installation, ventilation of refrigeration units, coolant filled, thermometers and jars supplied with certificates, documents recorded.

  3. 03

    OQ — Operational qualification

    Verifies each bath reaches and holds its set temperature, thermometer accuracy, and for automatic units the cooling rate and detection function.

  4. 04

    PQ — Performance qualification

    Tests reference or check samples with known cloud and pour points and shows agreement within the method precision; automatic units are compared with the manual method.

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