Reid Vapor Pressure - AutoREID
ASTM D323, D4953, ISO 3007, IP 69

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The AutoREID apparatus from AD systems is an automated Reid Vapor pressure instrument in full compliance with ASTM D323-B, ASTM D4953, and similar standards. These methods are for the determination of vapor pressure of gasoline, volatile crude oil, and other volatile petroleum products. The Reid method is particularly suitable for determination of vapor pressure of crude oil for transportation, storage and general handling purposes. The instrument directly measures the Reid vapor pressure without correlation or calculation.

Modern ergonomic design, fully automated interface, and convenient operation makes the AutoREID an excellent alternative to mini-methods for reliable and precise vapor pressure measurement. The AutoREID is compact with two measurement positions allowing two simultaneous and independent measurements. An additional position in the bath allows for air chamber conditioning, increasing test productivity. The test pressure vessels with quick connections assure fast and easy operation.

The AutoREID design allows testing of viscous and sticky samples or samples containing suspended particles without the risk of instrument damage. Vigorous mechanical agitation of pressure vessels accelerates pressure stabilization even on "difficult" samples such as crude oil. All components of the test pressure vessel are easy to disassemble and clean.

Special fuel
Pipeline and terminals
Crude oil

The ASTM D323, D4953, ISO 3007, IP 69 and other similar test methods cover procedure for the determination of vapor pressure of gasoline, volatile crude oil, and other volatile petroleum products, components and feedstocks. The Reid method is part of many petroleum product specifications and suitable for testing liquid samples that exert an air-saturated vapor pressure less than 180,0 kPa at 37,8 °C. Vapor pressure is an important physical property of volatile liquids. This test method is used to determine the vapor pressure at 37.8°C (100°F) of petroleum products and crude oils with initial boiling point above 0°C (32°F). Vapor pressure is critically important for both automotive and aviation gasolines, affecting starting, warm-up, and tendency to vapor lock with high operating temperatures or high altitudes. Maximum vapor pressure limits for gasoline are legally mandated in some areas as a measure of air pollution control. Vapor pressure of crude oils is of importance to the crude producer and the refiner for general handling and initial refinery treatment. Vapor pressure is also used as an indirect measure of the evaporation rate of volatile petroleum solvents.

Direct REID vapor pressure measurement
Perfectly suited for testing crude oil
Fully traceable, documented test results
Two independent measurement positions
Robust design requires little or no maintenance
Automation reduces operator involvement
Small foot print, quick warm-up, precise measurement
User-friendly Windows® interface


The sample is prepared in accordance with the test method. The sample is poured in the liquid chamber which is coupled to the air chamber by means of specially designed quick coupling connectors. The assembled pressure vessel is completely sealed. The instrument is designed for easy plug and go operation in full compliance with standard test method. The operator enters test identification in just a few keystrokes, places the pressure vessel in the water bath precisely maintained at 37.8°C (100°F) and connects the pressure link by quick connector.

The test begins automatically. The pressure vessel is agitated by reverserotation and the pressure curve is displayed in real time on the large color monitor. Two simultaneous measurements can be run independently and simultaneously. When the maximum stable pressure is reached, the test stops automatically and the saturated vapor pressure (RVP) is recorded.


All details related to each test are recorded and stored into local database. Complete test report including sample ID, operator name, date/time, RVP value and pressure curve is displayed on the screen. It can be printed on optional printer. Multi-criteria search function facilitates retrieval of test report in the database. Versatile communication features allow complete test report storage on a USB memory stick and/or transfer it to a LIMS when the AutoREID is connected to a LAN.

During the test progress the AutoReid software monitors for leaks and prompts the operator if pressure drops. The watchdog system permanently monitors bath temperature stability, bath level, overpressure or overheating, assuring highest quality results and increased safety of operation. Transparent bath cover provides for visual inspection of the pressure vessels during the test. Special auto-stop drive system protects the operator without disruption of the test. To ensure a perfect traceability the instrument calibrations are date/time tagged and calibration interval can be managed in the software. All information related to the instrument calibration is tracked into the calibration journal.


Technical Specification Description
Test method ASTM D323, D4953, ISO 3007
Resolution 0,1 kPa
Interface 8' full-color touch screen
Language English, French, Russian
Results storage Database, USB stick, LAN
Communication 2x USB 2.0, Ethernet port
Printing Graphic printer (optional)
Weight 30kg (without water)


Operation and Storage conditions Description
Operation temperature and humidity range +15° to +30° humidity: 10 to 65% RHL, no condensation
Storage temperature and humidity range -20° to +50°C humidity: 5 to 95% RHL, no condensation
Power supply 230V, 50/60Hz, 1phase
Power consumption Maximum (heat up): 2000W
Maintaining 37,8°C: 150W



The Instrument
Catalog Number Description Picture
AA310-001 Automated Reid Vapor Pressure apparatus - AutoREID 230V 50/60Hz
TThe instrument is supplied without standard pressure vessels ASTM D323 one opening,
with user manual, factory tested, ready for operation
Catalog Number Description Picture
AK000-005 Printer 112mm 230V 50/60Hz
Industrial thermal printer. Delivered pre-configured, with cable, adapter and 1 paper roll
AK310-006 Calibration Pressure Kit115V 50/60Hz
IIncludes: a digital manometer, a mnueal pressure pump, a munal vacuum pump, a connection pipe with quick connector,
a connection pipe to be connected on the rear panel, a carrying case and a traceable calibration certificate
AK310-002 Filling device (ASTM D323 A.1.8)
(Supplied not assembled)
AK310-003 Set of 2 caps (for ASTM D4953 method)
AK310-003 Filling device for metal can
Can be directly screwed on a metal can with a 38mm threaded neck (32mm opening)
AK310-004 Thermometer ASTM 18C
Parts and Consumables
Brass complete REID test vessel
Stainless steel complete REID test vessel
Brass Vapor chamber with fast coupling
Stainless steel Vapor chamber with fast coupling
(Supplied without sealing O-rings)
Brass Liquid chamber 1 opening with fast coupling
Stainless steel Liquid chamber 1 opening with fast coupling
Brass Pressure link with flexible tube and quick connector
Stainless steel pressure link with flexible tube and quick connector
AC310-001 O-Ring Seals (pack of 10)
AC000-001 Set of 10 printer paper rolls 112mm
MC291-025-001 Quick connector for pressure link
RT616-060-040 Flexible pressur hose D6 mm 1 meter