Brandt Instruments is the recipient of the MesaLabs 2016 Summit Club Award

Bios International is Now A Division of MesaLabs

Brandt Instruments-US Master Distributors for MesaLabs | Bios Defender 510, 520 & 530+ DryCal Primary Air Flow Calibrators with MesaLabs Bios DryCal-Pro Software
Brandt Instruments Representing MesaLabs

Bios Defender 530+ Plus Primary Flow Calibrator
DryCalPro Software
Using DryCal® Technology

Bios International is now a division of MesaLabs

NEW MesaLabs Bios Defender 530+ Plus
Standardized & Volumetric Flow Measurement
Primary Standard Air Flow Calibrator
Air Flow Calibrator with DryCal® Technology

        HomeMesaLabs MesaLabs Bios Defender 530+ Primary Flow Calibrator



Bios Defender 530+

The 530+ replaced the Definer 220 MetLab series of calibrators in January 2017.

The 530 plus has the same flow rates as the Definer 220 from 5 cc to 30 liters to an accuracy of ▒1% percent for readings standardized for temperature and pressure and ▒0.75% in volumetric flow.

The MesaLabs Defender 530+, with the ability to take both volumetric and standardized readings, adds to the abiities of the popular Defender 510 and 520 line of DryCal primary flow calibrators. Automatic correction of readings for temperature and pressure, rather than merely recording of ambient conditions is essential in many applications.

The Defender 530+ provides users with a true primary flow calibrator for industrial hygiene, environmental and laboratory applications.

Defender primary flow meters are designed to provide light weight ultra-compact size, incorporating the industry leading DryCal technology. Building on the patented DryCal near-frictionless piston technology, the Defender 500 series incorporates features to make it immune to flow source pulsation without the need for in-line dampers.

The Defender 530+ is easy to use.  Turn it on. Connect it to a sampling pump. Start taking readings. It's as simple as that. Calibrations within a minute with no messy soap bubble solutions to wait on or clean up or warm-up times..

The Defender 510, 520 and 530+ can take hands-free continuous readings while quickly and accurately setting the flow rate on air sampling pumps or other instruments. The Defender calibrators connect to any PC and pre- and post-calibration data can be downloaded to the DryCal® Pro software. 

The MesaLabs Defender - Overview


  • Proven percent of reading accuracy is supported by ISO 17025 accreditation by NVLAP of NIST
  • Integrated temperature sensors and pressure transducers placed directly in the flow stream for optimum standardized results.
  •  Housed in a molded case with rubber handgrips for a better feel and a sleeker, more contemporary look
  •  Large illuminated flow cell viewing window
  •  Navigation menu and a large, illuminated graphical display with zoom feature
  •  Rated for extreme cold operation, down to -20 ºC
  •  RoHS (Restriction of Hazardous Substances) compliant for Europe
  •  Automatic Shutoff
  •  Choose between flow units
    • – Volumetric: mL/min, L/min, cc/min, or cf/min
    •   Standardized: smL/min, L/min, cc/min, scf/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
  •  Available in three models for application expansion. Use the
    •  Available in three models
    •  Defender 510 to calibrate personal air samplers and other volumetric instruments, or the
    •  Defender 520 "three-in-one" to calibrate volumetric instruments, record ambient temperature and pressure  conditions for your audit trail, or calibrate devices that read in mass flow.
    •  Defender 530+ for both volumetric flow readings or standarized readings, which correct for temperature and  pressure, or to calibrate devices that read in mass flow
Proven DryCal Technology Defender 530 Specifications

MesaLabs Bios Defender 530+ Specifications

MesaLabs Defender 510, 520 & 530+ Calibrators Include:
Instrument, Serial Cable, 100-240V AC Power Adapter/Charger with US plug configuration, Plastic Leak Test Caps (2), NIST-Traceable Calibration Certificate, Mini-Manual and instructions for downloading the free DryCal Pro Software. The 530+ comes standard with Swagelok® fittings (models L and M, 1/4" and model H only 3/8") and is shipped with a barb adapter for use with soft tubing if needed and (1) leak test cap..

* Calibrators come standard with US chargers
Adapter plugs available for use in Australia, UK or Europe
For each additional plug add $5.25

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  
   DryCal Defender Low (L) Flow: 5 to 500 ccm
   DryCal  Defender Medium (M) Flow: 50 - 5,000 ccm 
   DryCal Defender High (H) Flow: 300 - 30,000 ccm
   Volumetric ±1.0%
   Standardized ±0.75%
User-Selectable Measurement Units
   Volumetric Flow mL/min, L/min, cc/min, cf/min
   Standarized Flow smL/min, sL/min, scc/min, scf/min
   Pressure mmHg, PSI, kPa
   Temperature ºC, ºF
   Approximate Time per Reading 1-15 seconds
   Reading Styles Single (manual), Continuous or Burst, with averaging function user-selectable from 1 to 100 measurements
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 Sensor
In the flow stream
Pressure: ±3.5 mmHg (typical), ±7.0 mm (max)
Temperature: ±0.8 °C (typical), ±1.3 °C (max)
Battery System  
   AC Adapter/Charger 12 DC, >250 ma, 2.5 mm, center positive
   Battery 6V rechargeable, sealed lead-acid, 6-8 hours typical operation
   Battery Operational Time  (5 cycles/min), 3 hours backlight on, 8 hours backlight off
Pressure & Suction Fittings Swagelok® fittings (models L and M, 1/4" and model H only 3/8") and is shipped with a barb adapter for use with soft tubing if needed.
Display Backlit graphical LCD
Storage Temperature 0-70 °C
Ambient Humidity 0-70% - non-condensing
Operating Pressure  (Absolute) 15 PSI
Warranty Instrument: 1 year, Battery: 6 months
Data Port
Serial RS-232 (for use with DryCal Pro software)
Data Cable 1 meter (Defender Data Port to PC Serial Port)
Protective Case Pelican cases 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


                DryCal® Pro Software

MesaLabs Bios DryCal Pro Software for Defender 500 series and Definer 220 Primary Flow Calibrators

The Defender 510 and 520, Defender 530 and the Met Lab Definer 220 calibrators can use the new DryCal Pro software for bullet-proof transfer of volumetric and standardized flow data and have 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

       Bios Defender 510, 520 and 530+

          Calibrator Kit Options & Pricing

Defender 510, 520 and 530+ Include: Instrument, Serial Cable, 100-240V AC Power Adapter/Charger with US plug configuration, Plastic Leak Test Caps (2), NIST-Traceable Calibration Certificate, Mini-Manual and instructions for downloading the free DryCal® Pro Software. The 510 & 520 calibrators have standard barb fittings. The 530+ calibrators have Swagelok® fittings (models L and M, 1/4" and model H only 3/8") and are shipped with a barb adapter for use with soft tubing if needed and (1) leak test cap.

* Calibrators come standard with US chargers
Adapter plugs available for use in Australia, UK or Europe
For each additional plug add $10.00

Brandt instruments, Inc. are the U.S. distributor for MesaLabs calibrators only.
Please contact us for special web pricing.

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

Part Number


Flow Range *

200-510-L Defender 510-Low Flow 5 to 500 mL/min
200-510-M Defender 510-Medium Flow 50 ml/min to 5 LPM
200-510-H Defender 510-High Flow 300 ml/min to 30 LPM
200-520-L Defender 520-Low Flow 5 to 500 mL/min
200-520-M Defender 520-Medium Flow 50 ml/min to 5 LPM
200-520-H Defender 520-High Flow 300 ml/min to 30 LPM
530+ Plus
200-530+L Defender 530+ Low Flow 5 to 500 mL/min
200-530+M Defender 530+ Medium Flow 50 ml/min to 5 LPM
200-530+H Defender 530+ High Flow 300 ml/min to 30 LPM

* Defender 510 = ±1% of reading volumetric.
* Defender 520 = ±1% of reading volumetric, includes temperature and pressure recording
* Defender 530+ =..±0.75% of reading volumetric, ±1% of reading standardize for temperature     & pressure


NEW $200 DryCal Calibrator Trade-In Program

MesaLab Bios DryCal or Competive Calibrators*

For each DC-1, DC-2, DryCal DC-Lite or competitive calibrator,
receive $200 off of the prices above. Expires March 30, 2019.

Easy 1-2-3 Procedure:

1. Provide us with the serial number & model of your trade-in calibrator. We will provide you with a quote including the trade-in discount.
2. Place an order for the new Bios Defender calibrator.
3. We will provide you with an RMA to return the trade-in to Bios and promptly return the trade-in calibrator to Mesa within 2 weeks of receiving your new Defender. Customer is responsible for all shipping charges associated with the returned unit.

* Note: One for one trade-in policy on new units

Trade-In Details Brochure


Note: MesaLabs now require that we post only list pricing
Please call or e-mail us at the numbers below for our web pricing


Proven DryCal Technology

MesaLabs Defender 530+ Accessories
Software, Hardware & Cases


Part #
Accessory Description

US $


100-222 Bios Universal  Adapter/Charger
Adapter/Charger Universal

Universal 100-240V, 12 VDC with USA plug configuration. For UK, Europe or Australia add adapter plug below.
Adapter/Charger Plug for Defender 510 & 520
For use with universal adapter, additional plug configurations for UK, Europe or Australia, please specify which adapter
Leak Test Plug For
Defender 530+
Leak test plug to fit 1/4" Swagelok« fitting, models L and M
Leak Test Plug 3/8
Leak Test Plug For
Defender 530+
Leak test plug to fit 3/8" Swagelok« fitting, model H only
100-411 MesaLabs Bios Defender 530+ 3/8" Swagelok barbed bitting for H Model
Fitting, Barbed
3/8" Swagelok« barbed fitting, model H
3/8' Swagelok« ferrule, Model H
Swagelok® Reducer
3/8"Ł Swagelok« to 1/4'Ł Swagelok« reducer, Modell H
Ferrule & Nut
Swagelok« Nut and Ferrule set 3/8" for model H
100-450 MesaLabs Bios Defender 1/4' Swagelok barbed fitting L & M models
Fitting, Barbed
1/4" Swagelok« barbed fitting, model L&M
100-420 Bios Plain Tubing by the Foot
Tubing by the Foot
Tygon, laboratory grade, 1/4" ID, 3/8" OD; flexible; kink, pinch, chemical and heat resistant. Please specify length.
per foot
300-002 Optimizer Collect Upgrade
DryCal® Pro Software

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

No Charge
100-113 PC Serial Port Card
PC Card
Provides a serial port for laptop computers

Bios RS-232 Serial Cable for Defender to PC Connection
Serial Cable

RS-232 cable for Defender to PC connection
100-250 Pelican 1200 Case for Bios  Defender Calibrator
Pelican 1200
Hard, heavy duty case with custom foam; fits 1 Defender
100-251 Pelican 1520 se for 2-3  Bios  Defender Calibrato
Pelican 1520
Hard, heavy duty case with custom foam; fits 2-3 Defenders

Pricing effective January 01, 2018. 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.

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

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