Computrac Vapor Pro XL Autosampler


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Note: Accessory kits (sold separately) are necessary to operate this product. Accessory kits and other requirements like power cords can be purchased using the following links:
Purchase Computrac® accessory kits
Purchase power cords (only for 220V)
Purchase Operation Manual

The Vapor Pro® XL (VPXL) Autosampler is the latest in moisture-specific analysis technology offering accuracy, precision, flexibility, and automation to test up to 16 samples with individual test profiles. The VPXL Autosampler’s advanced moisture analysis capabilities make it a chemical-free alternative to Karl Fischer titration. Its compact size and upgraded features make the VPXL Autosampler ideal for nearly any application where test automation and increased throughput is needed. 

Features and Benefits

  • Zero Chemical ReagentsThe Vapor Pro® XL offers moisture specific analysis that correlates well with Karl Fischer without the hassle or expense of hazardous chemical reagents, costly glassware or time-consuming maintenance.
  • Versatile: The VPXL Autosampler is ideal for nearly any application where the Karl Fischer titration is used. Its ability to individualize sample test profiles make it perfect for all industries ranging from plastics and petroleum products to pharmaceuticals and chemicals. The maximum testing temperature can be set to 300°C. It also allows for improved control over testing temperatures across the range of the instrument.
  • Automation: The VPXL Autosampler provides the ability to quickly and automatically test up to 16 samples, dramatically increasing throughput in a
    compact instrument.
  • Stepped Temperature Testing: The VPXL Autosampler offers stepped temperature testing capabilities that make method development easier than ever before.
  • Flexible Ending Criteria: The user-adjustable ending criteria optimizes test results and performance for any unique application.
  • Data Storage: The VPXL Autosampler stores up to 250 test programs and retains the previous 1000 test results and 100 test graphs. Users can view and select past test results for statistical analysis and test various samples with ease.


Moisture Range:

10 ppm (10 ug | 0.001%) to 100%

Number of Samples:

Up to 16

Moisture Resolution

1 ppm (0.1 ug | 0.0001%)


41 lbs (18.6 kg)

(L x W x H)

29.0 x 15.5 x 8.2 in
(737 x 394 x 208 mm)


<10% C.V. for samples >0.1% moisture
<15% C.V. for samples <0.1% moisture

Temperature Range:

25°C to 300°C

Sample Size:

0.01 g to 8 g


% moisture, ppm moisture, µg water


Stores of up to 250 test programs, last 1000 test
results and last 100 test graphs

Statistical Analysis:

Mean, SD, CV

Ending Criteria:

User-adjustable: Prediction, Rate, Time, Time then Rate


Manual calibration with NIST traceable capillary tubes

Operating Environment:

30-40°C at <50% RH;
0-31°C at <80% RH


Two years, factory parts and labor (one year international)

Carrier Gas:

Dry nitrogen or dry air (-40°C dew point or lower is suggested)
at 17-22 psi (user supplied)


LCD 800 x 480 Color TFT

ASTM & Regulatory Compliance

21 CFR Part 11 Compliant (optional): Meet regulatory compliance standards for pharmaceutical and medical device companies.

ASTM D7191-10: Standard Test Method for Determination of Moisture in Plastics by Relative Humidity Sensor

ASTM D7546-15: Standard Test Method for Determination of Moisture in New and In-Service Lubricating Oils and Additives by Relative Humidity Sensor

It also correlates well with popular methods, including: ASTM D6304-16, D6869-03, D1364-02, D4017-02, D4928-12, E1064-16, D5530-15 and D4672-12.

Learn how you can try a Computrac® for free. 

Contact our sales team for more information on our Computrac® series. 


VPXL-AutoSampler Brochure