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MINIVAP ON-LINE RVP Process Analyzer

New product

Grabner/Reid Vapor Pressure On-Line Analyzer

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MINIVAP ON-LINE is a process monitoring analyzer for the determination of the vapor pressure of gasoline, crude oil, LPG and NPG. Also, the vapor-liquid ratio (LVR) of gasoline can be measured. The measuring principle is identical to the worldwide used laboratory instruments MINIVAP and therefore the MINIVAP ON-LINE produces equivalent results.

Up to 2 different sample streams can be connected to one single analyzer. It is the only available process vapor pressure tester that fully complies to the industry relevant ASTM standards for gasoline (ASTM D6378), crude oil (D6377) and LPG (D6897).

The unmatched accuracy makes refineries save thousands of Dollars each day!

Click on the "Calculator" TAB to calculate your savings today!

The measuring principle is based on the triple expansion method of Grabner Instruments´ worldwide approved and accepted laboratory vapor pressure tester for gasoline and crude oil: MINIVAP VPS. The US-EPA declared MINIVAP the official reference instrument for the USA in 1993.

With MINIVAP ON-LINE, the vapor pressure of gasoline (D6378 / D5191), crude oil (D6377 / D323), liquid petroleum gas (D6897 / D1267) and the vapor-liquid ratio temperature of gasoline (D5188) can be determined. With possible connection of up to 2 different sample streams, these measurements can be performed with one single instrument. 


Grabner/Reid Vapor Pressure On-Line Analyzer  Product | Small | MINIVAP ON-LINE Row 

  • On-line Compliance Monitoring for Vapor Pressure of Gasoline, LPG and Crude Oil and Vapor/Liquid-Ratio Temperature of Gasoline (V/L=20)
  • One Single Instrument for up to 2 Sample Streams
  • Multiple Point Measurements at Different Nominal Pressures
  • Automatic Calibration & Offset Correction
  • Temperature Controlled Sample Conditioning System
  • 7 Minutes Cycle Time
  • Explosion Proof-Class I
    • NFPA 496 (US)
    • EN 60079-2 and EN 60079-0 (EU)


  • ASTM D6378 - Vapor Pressure of Gasoline (VP4)
  • ASTM D6377 - Vapor Pressure of Crude Oil
  • ASTM D6897 - Latest standard for Vapor Pressure of LPG
  • ASTM D5191
  • ASTM D5188 - V/L-Ratio: T (V/L = 20)
  • ASTM D4953
  • ASTM D1267
  • ASTM D323
  • EN 13016 - 1+2
  • IP 394, 409 & 481
  • JIS K2258-2, SHT 0769, GOST 52340

Technical Data
Temperature Range

20 to 60°C (68 to 140°F)
Pressure Range 0 to 1000 kPa (0 to 145 psi)
Power Requirements 100/120/230/240 V AC, 50/60 Hz, 65 W
Field Application 12 V/4A DC (vehicle battery)
Physical Dimensions 580 x 1060 x 260 mm (23.7" x 43.3" x 10.6")
Weight     50 kg (110 lb)

Precision Data MINIVAP 37.8°C @ 70 kPa)  ASTM D323 (Wet Reid Bomb)   
Repeatability  ±0.3 kPa (0.04 psi) ±3.2 kPa (0.46 psi)
Reproducibility ±0.7 kPa (0.10 psi) ±5.2 kPa (0.75 psi)

The sample flows from the sample conditioning system via a quick connector (3) and sample inlet valve (4) into the measuring chamber. The automatic sample introduction and volume adjustments are made by a piston with an integrated pressure transducer (1). The measuring chamber (2) with a total volume of 5 mL is rinsed with 2.5 mL and filled with 1 mL. After closing the valve (4), the single or triple expansion to 5 mL (with the sample under vacuum condition) is obtained by further strokes of the piston. The temperature of the measuring cell is controlled with a high-power thermoelectric module (5) and measured with a precision Platinum sensor (6). To achieve fast pressure equilibrium, especially for crude oil, the measuring unit is rocked during the test procedure.
Product | Small | MINIVAP ON-LINE Measuring Principle 

Automatic piston lubrication is processed with every piston stroke.
Product | Small | MINIVAP Lubrication

Continuous product development may make it necessary to change product specifications without notice.