Brandt Instruments-US Master Distributors for MesaLabs Bios Defender 510, 520 and 530+ DryCal Primary Air Flow Calibrators with DryCal-Pro Software
Brandt Instruments - US Distributor for MesaLabs
Bios Defender 510, 520 and 530+ Primary Flow Calibrators
Using DryCal® Technology

MesaLabs Bios International is now a division of MesaLabs
MesaLabs Bios Defender
510 & 520 Primary Flow Meter
Primary Air Flow Calibrators with DryCal® Technology

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Proven DryCal TechnologyBios Defender 510 & 520 with DryCal Technology

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MesaLabs Bios Defender 510 and Defender 520 are the next generation of the patented DryCal® near-frictionless piston technology true primary air flow calibrators for industrial hygiene and environmental health and safety applications. Easily calibrate personnel and area sampling pumps and rotometers used in industrial, commercial, IAQ, lead, asbestos,mold and respirable dust monitoring.

Everything you have trusted about Bios DryCal® patented technology in the past is available in the Defender 510, 520 & 530+ calibrators that make it easier than ever to calibrate air sampling pumps, rotometers or other flow instruments without the need for in-line dampers. Depending on the model, measure volumetric flow or standarized flow, which correct for temperature and pressure to calibrate devices that read in mass flow.

Like all MesaLabs calibrators, the Defender 500 series calibrators are easy to use. Turn it on, connect it to a sampling pump or instrument being calibrated and start taking readings. It's as simple as that. Calibrations are completed quickly with no messy soap bubble solutions to wait on or clean up after.

The Defender 510 and 520 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 using the DryCal® Pro software.

The MesaLabs Bios Defender Model Overview

Defender 500 Series Model Flexibility Depending on Application
  •  Defenders available in three different flow range models depending on application
     1. Defender 510: volumetric flow calibration of personnel or area monitoring air samplers
    2. Defender 520: enhanced volumetric flow calibration with ability to record ambient temperature     and pressure conditions for audit trails
    3. Defender 530+: calibrate using volumetric flow readings or standarized readings which correct for     temperature and pressure, and calibrate devices that read in mass flow
  •  Choose between flow units
    • – Volumetric: mL/min, L/min, cc/min, or cf/min
    •   530+ Only: 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
Defender 510 and 520 Accuracy
  • Accuracy of ±1% percent for volumetric flow readings
  • 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 in the Defender 520.
Specifications
Proven DryCal Technology Defender 510/520 Specifications


MesaLabs Bios Defender 510 - 520 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  
DryCal Defender Low (L) Flow: 5 to 500 mL/min
DryCal  Defender Medium (M) Flow: 50 - 5,000 mL/min 
DryCal Defender High (H) Flow: 300 - 30,000 ml/min
Accuracy  
Volumetric (Defender 510 or 520) ±1.0%
User-Selectable Measurement Units
Volumetric Flow mL/min, L/min, cc/min, cf/min
Pressure (Defender 520 only) mmHg, PSI, kPa
Temperature (Defender 520 only) 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  (5 cycles/min), 3 hours backlight on, 8 hours backlight off
Pressure & Suction Fittings ¼” ID Hose Barb
Warranty Instrument: 1 year, Battery: 6 months
Storage Temperature 0-70 °C
Ambient Humidity 0-70% - non-condensing
Operating Pressure  (Absolute) 15 PSI
Display Backlit graphical LCD
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 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

Software

MesaLab's' Bios Defender 510, 520, 530 primary flow calibrators with DryCal Technology MesaLabs DryCal Pro Software Logo               MesaLabs DryCal® Pro Software

MesaLabs Bios DryCal Pro Software for Defender 510, 520, 530 and Definer 220 Primary Flow Calibrators

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The Defender 510, 520 and Defender 530+ calibrators can use the 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.
Kit Options
  Proven DryCal Technology

       Bios Defender 510, 520 & 530+
        Calibrator Kit Options & Pricing



MesaLabs Bios Defender 510, 520 & 530+ Calibrators Include: Instrument, 100-240V AC Power Charger with US, UK, Europe and Australian plug adapters, NIST-Traceable Calibration Certificate, PC serial cable and Mini-Manuale. The 510 & 520 calibrators have standard barb fittings with (2) Plastic Leak Test Caps. 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) Plastic Leak Test Cap.

* Calibrators come standard with 100-240V AC Power Charger
with US, UK, Europe and Australian plug adapters.

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

Description

Flow Range*

 Jan 2026
US $ Pricing++		 5% Tariff Surcharge Add
510
    
200-510-L Defender 510-Low Flow 5 to 500 mL/mil
$1,892.63
+ $94.63
200-510-M Defender 510-Medium Flow 50 ml/min to 5 LPM
$1,892.63
+ $94.63
200-510-H Defender 510-High Flow 300 ml/min to 30 LPM
$1,892.63
+ $94.63
520
    
200-520-L Defender 520-Low Flow 5 to 500 mL/min
$2,172.73
+ $108.64
200-520-M Defender 520-Medium Flow 50 ml/min to 5 LPM
$2,172.73
+ $108.64
200-520-H Defender 520-High Flow 300 ml/min to 30 LPM
$2,172.73
+ $108.64
530+ Plus
    
200-530+L Defender 530+ Low Flow 5 to 500 mL/min
$3000.08
+ $150.00
200-530+M Defender 530+ Medium Flow 50 ml/min to 5 LPM
$3000.08
+ $150.00
200-530+H Defender 530+ High Flow 300 ml/min to 30 LPM
$3000.08
+ $150.00


++ NOTE: Tariff surcharge rates of 5% are effective on September 15, 2025      on all MesaLabs instruments and accessories. Add 5% to the pricing listed.

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

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

    Download pdf Purchase Order Form
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Accessories

Proven DryCal Technology

MesaLabs Bios Defender 510 & 520 Accessories
Software, Hardware & Cases

Part #
Accessory
Accessory Description

Pricing ++
US $ Add 5% Tariff to Pricing

100-222

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.

90.00

 
100-413
100-413 Bios Plastic Leak Test Cap - Yellow
Leak Test Cap

Plastic, yellow, for suction and pressure fittings
during self leak test (package of 10)
20.00
100-420
100-420 Bios Plain Tubing by the Foot
Tubing by the Foot

PVC, plain, 1/4" ID – 3/8" OD; please specify length, up to 25 feet, *Cost is per foot

Also Available - 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. Call for pricing.
$17.00
per foot
 
300-002 Optimizer Collect Upgrade
DryCal® Pro Software

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

http://drycal.mesalabs.com/drycal-pro-software/

No Charge
100-113

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

RS-232 cable for Defender to PC connection
38.00
100-250
100-250 Pelican 1200 Case for Bios Defender Calibrator
Pelican 1200
Hard, heavy duty case with custom foam; fits 1 Defender
171.00
100-251
100-251 Pelican 1520 se for 2-3 Bios Defender Calibrato
Pelican 1520
 Hard, heavy duty case with custom foam; fits 2-3 Defenders
420.00


++ NOTE: Tariff surcharge rates of 5% are effective on September 15, 2025
     on all MesaLabs instruments and accessories. Add 5% to the pricing listed.


Pricing effective January 1 , 2026. Subject to change without notice.
    Download pdf Purchase Order Form
       Download Word Purchase Order Form
Terms for Instrument and Accessory Returns:
NOTE: Any products returns must be done within 15 days of the date of shipment. Credit will only be issued for returns valued at over $350 per sales order, and will incur the MesaLabs 30% restocking fee on the list price of the items purchased. To return any instruments 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 the original cartons. Product must be returned in original "sellable" condition (i.e. product has not been turned on, activated or used, has not expired, product packaging remains unmarked and includes all original accessories, spares, documentation and promotional items). Final determination regarding the acceptability of the returns will be made by MesaLabs upon receipt. The sender is responsible for any carrier loss or damage.


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