Brandt Instruments-US Master Distributors for MesaLabs Bios FlexCal DryCal precision 0.5% primary air flow calibrators with automatic temperature and pressure compensation. Flow range from 5 ccm to 50 LPM
Brandt Instruments Representing MesaLabs
FlexCal Precision Primary Flow Calibrator
Using DryCal® Technology

Bios International is now a division of MesaLabs
MesaLabs Bios DryCal

FlexCal Precision 0.5% Primary Flow Calibrator
Flow Ranges from 5 ccm to 50 LPM
Automatic Temperature & Pressure Compensation
Air Flow Calibrators with DryCal® Technology

HomeMesaLabs MesaLabs FlexCal Primary Flow Calibrator

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MesaLabs Bios FlexCal Precision Primary Air Flow Calibrator

FlexCal Click link to view instrument close-up

The MesaLabs Bios DryCal FlexCal series calibrator is a precision primary flow calibrator comprised of three models with flow ranges from 5 ccm to 50 LPM, capable of volumetric and standardized flow measurement accuracy of 0.5% of the reading. An economical option for small analytical laboratories, research & development organizations, manufacturing and calibration labs that may not need the 0.15% accuracies of the MetLab 800 series calibrators. Perfect, for instance, for use in calibrating industrial mass flow meters.

  • USB connectivity
  • Flow ranges from 5 ccm to 50 LPM
  • Quick start operation
  • Graphical LCD display
  • User-selectable flow units and time intervals

The FlexCal is small, easy to carry and ready for even the most demanding of applications. When using the Mesa Labs FlexCal, you are guaranteed high accuracy with high confidence without the use of soap bubbles, timers, or heavy mercury provers. Quick start operation Graphical LCD display user-selectable flow units and time intervals.

A versatile, push-button flow meter, the FlexCal is a primary flow standard which enables the user to accurately calibrate a variety of instruments while maintaining an ISO 17025-traceable audit trail.

MesaLabs DryCal FlexCal Overview


  • Standardized or Volumetric Flow: 0.5%
  • MesaLabs is a fully accredited ISO-17025 facility with a 0.08% Scope of Accreditation for gas flow by NVLAP of NIST.
  • Integrated temperature sensors and pressure transducers placed directly in the flow stream for optimum standardized results recording
  •  Choose between volumetric or standardized flow units – (mL/min, L/min, cc/min, cf/min)
  •  Include up to one hundred readings in a group average
  •  Take individual readings, continuous hands-free readings, or set to read in time intervals anywhere  from one minute to sixty minutes between readings


  • The DryCal® Pro software is available for the FlexCal with an integrated USB PC interface for easy transfer of flow data to a text file, with automatic recording and graphing of flow measurements. These records can also be easily opened in a variety of off-the-shelf database applications, including Microsoft Excel or Access.

Proven DryCal Technology Defender 510/520 Specifications

FlexCal Specifications

Size 5.5"H x 6"W x 3"D
140 mm x 150 mm x 75 mm
Weight 29 oz. / 820 g
Flow Ranges  
FlexCal-L Low Flow 5 to 500 ccm
FlexCal-M Medium Flow 50 ccm - 5 LPM 
FlexCal-H HighFlow 0.5 - 50 LPM
Accuracy At gas pressure of 760 mmHg, gas temperature of 25°C with standard temperature set to 0°C.


0.5% of reading
0.5% of reading
User-Selectable Measurement Units
Volumetric Flow mL/min, L/min, cc/min, cf/min
Standard Flow smL/min, sL/min, scc/min, scf/min
Pressure mmHg, PSI, kPa
Temperature ºC, ºF
Approximate Time per Reading 1-15 seconds
Gas Compatibility Use with non-corrosive, non-condensing, non-combustible gases, less than 70% humidity
Flow Modes Suction or Pressure
Measurement Cell Style Integrated
Temperature & Pressure Sensors In the flow stream
Press: 3.5 mmHg (typical), 7.0 mm (max)
Temp: 0.8 °C (typical) 1.3 °C (max)
Reading Styles Single (manual), Continuous or Burst, with averaging function user-selectable from 1 to 100 measurements
AC Adapter/Charger 12 DC, >250 ma, 2.5 mm, center positive
Battery System 6V rechargeable, sealed lead-acid, 6-8 hours typical operation
Battery Operational Time  3 hours backlight on, 8 hours backlight off
Pressure & Suction Fittings 1/4" Swagelok® compression fittings on Low & Medium Flow Models, 3/8" on High Flow Model
Warranty Instrument: 1 year, Battery: 6 months
Storage Temperature 0-70 °C
Ambient Humidity 0-70% - non-condensing
Operating Pressure  (Absolute) 15 PSIA Max
Display Backlit graphical LCD
Data Port
USB (for use with DryCal Pro software)
Data Cable 1 meter (FlexCal Data Port to PC USB port)
Protective Case Pelican case available
Laboratory Accreditation Instruments are manufactured and calibrated by MesaLabs accredited to the ISO 17025, ANSI Z540, and NIST Handbook 150 standards. Traceability to the International System of Units (SI) and NIST is verified by accreditation to the ISO/IEC 17025.
Instrument Certification RoHS and CE Compliant

Adobe Acrobat pdf format - Bios Gas  Flow Bench MesaLabs_Bios_FlexCal_Calibrator_Brochure

Adobe Acrobat pdf format - Bios Gas  Flow Bench MesaLabs_Bios_FlexCal_Calibrator_Manual

Kit Options

  Proven DryCal Technology

   MesaLabs FlexCal Series Calibrator Kit Options & Pricing

The FlexCal Includes: Instrument, 100-240V AC Power Adapter/Charger, USB Cable, (1) Plastic Leak Test Cap, NIST-Traceable Calibration Certificate, Manual, Swagelok® fittings (models L&M, ¼"; model H only, 3/8") and instructions for downloading the free DryCal® Pro Software. Optional Pelican cases are available.

* Calibrators come standard with US chargers
Adapter plugs available for use in Australia, UK or Europe
For each additional plug add $5.75

Brandt instruments, Inc. are the distributor for MesaLabs calibrators only in the US

Overseas customers please contact your local distributor for pricing which includes international shipping charges, import duties and local taxes.

Part Number


Flow Range

US $ Pricing
FlexCal-L FlexCal Low Flow 5 to 500 ccm
FlexCal-M FlexCal Medium Flow 50 ccm to 5 LPM
FlexCal-H FlexCal High Flow 0.5 to 50 LPM

Purchase Order Form     Download pdf Purchase Order Form
   Purchase Order Form    Download Word Purchase Order Form

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MesaLabs FlexCal Accessories, Software, Hardware & Case

Part #
Pricing in US$
100-222 Bios Universal  Adapter/Charger
Adapter/Charger Universal
Universal 100-240V, 12 VDC; single charger for use in multiple countries. Comes with one plug configuration of your choice: U.S., U.K., European or Australian plug configuration. For additional plugs, see part 100-215.
100-215 Adapter/Charger Plug For use with universal adapter, additional plug configurations for UK, Europe or Australia, please specify
100-406 Leak Test Plug Leak test plug to fit 1/4" Swagelok« fitting, models L and M
100-407 FlexCal 3/8" Leak Test Plug
Leak Test Plug
Leak test plug to fit 3/8" Swagelok« fitting, FlexCal model H

100-411 FlexCal Barbed Fitting
Fitting, Barbed

3/8" Swagelok« barbed fitting, FlexCal H
100-429 Ferrule 3/8' Swagelok« ferrule, FlexCal H
100-432 Swagelok® Reducer 3/8"Ł Swagelok« to 1/4'Ł Swagelok« reducer, FlexCal H
100-445 Ferrule & Nut Swagelok« Nut and Ferrule set 3/8" for FlexCal H
100-420 Tygon Flexible Tubing by the Foot
Tubing by the Foot
Tygon, laboratory grade, 1/4" ID, 3/8" OD; flexible; kink, pinch, chemical and heat resistant. Flexible tubing for use with barb fitting. Please specify length.
per foot
MesaLabs | Bios Definer 220 | primary flow calibrators with DryCal Technology
300-002 DryCal Pro Software
DryCal® Pro Software

DryCal® Pro Software is available at no charge from the download site at:

No Charge

Pelican Case
Pelican heavy duty case with custom foam; fits 1 FlexCal calibrator and accessories

US List Pricing effective January 1, 2019. Subject to change without notice.

    Download pdf Purchase Order Form
       Download Word Purchase Order Form

Terms for Instrument and Accessory Returns:
NOTE: Any returns will incur a 30% restocking fee on the list price of the item. To return any instruments or accessories you must request a Return Authorization number prior to returning anything to the factory for credit. This Return Authorization number must be prominently displayed on the outside of the shipping box. All products returned to MesaLabs must be sent freight pre-paid, in new condition and in the original cartons with all unopened software, accessories and manuals. The sender is responsible for any carrier loss or damage.

MesaLabs FlexCal Front View of Calibrator

Front View

MesaLbs FlexCal Precision Calibrator Top View

Top View


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    18568 Oak Grove Parkway 
    Prairieville, LA  70769 
Phone: 225-673-6776
    Fax: 225-673-6725

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