MesaLabs DryCal Defender 510 – 5 ml/min to 30,000 mL/min


Bios Defender 510 is a true Primary Standard using dry-piston swept volume technology. Flow cell ranges are 5 mL/min – 500 mL/min, 50mL/min – 5,000 mL/mim and 300 mL/mim – 30,000 mL/min with an accuracy of ±1% of reading volumetric. Light weight, toughened case with rubber overwrap grip, the 510 is suitable for laboratory and field use.

Ordering information

When ordering please indicate your selection of Low, Medium or High flow range from the dropdown menu. DryCal Pro software is free and can be downloaded from MesaLabs website. The Drycal Defender 510 kit includes calibrator, serial cable, leak test caps (2) and manual.



MesaLabs DryCal Defender 510 – 5 ml/min to 30,000 mL/min

The MesaLabs DryCal Defender 510 is a true Primary Standard calibrator using dry-piston swept volume technology. The Defender 510 accuracy is ±1% of reading at flow rates from 5 ml/min to 30,000 mL/min. The Defender 510 instruments are easy to use, fast responding, hands-free calibrators for accurately setting flow rates of air sampling pumps and calibrating other instruments.

MesaLabs Defenders 510 are compact, light weight and ideal for use in both the laboratory and in the field. The tough plastic case has molded rubberized hand grips for ease of handling. The front of the case has a clear plastic window for visual observation of the measuring cell. The top of the case has a back-lighted display and multi-function control button for on/off and navigation of the operating menu.

DryCal instruments are manufactured and calibrated by MesaLabs in the U.S. MesaLabs is accredited to 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 by NVLAP under Code 200661-0.

DryCal Pro Software

DryCal Pro software captures flow data from your DryCal directly to a PC and you can export the data to a Microsoft environment. It also allows real-time flow data monitoring and graphing along with allowing you to enter flow rates from sampling pumps or other flow source and calibrate the flow source. DryCal Pro is free and can be downloaded from MesaLabs  website.

MesaLabs DryCal Defender 510 flow ranges and accuracy of volumetric flow  are:

Model #
Flow vol
Low 200-510-L 5-500 ±1% reading
Medium 200-510-M 50-5000 ±1% reading
High 200-510-H 300-30000 ±1% reading


The standard Mesa-Bios Warranty is one year from date of purchase for the instrument, 6 months for the battery.

Annual Service Package (purchased separately)

The annual service and calibration service includes full product refurbishment each time the instrument is returned including cleaning and replacing all filters and seals, and battery test and replacement if needed.  Any firmware or hardware upgrades are also installed at that time as part of the process. (Some upgrades may incurr an extra charge) The calibration includes 3-point flow calibration. The NIST-traceable certificate returned with the instrument includes pre- and post- calibration data. These data are also stored in Mesa-Bios’ calibration database for future reference.

Ordering information

When ordering please indicate your selection of Low, Medium or High flow range from the drop-down menu. DryCal Pro software is free and can be downloaded from MesaLabs website. The Drycal Defender 510 kit includes calibrator, serial cable, leak test caps (2) and manual.

Defender 510 Specifications

Size 5.5″H x 6″W x 3″D140 mm x 150 mm x 75 mm
Weight 29 oz. / 820 g
Flow Ranges  
DryCal Defender 510 Low (L) Flow: 5 to 500 mL/min
DryCal Defender 510 Medium (M) Flow: 50 – 5,000 mL/min 
DryCal Defender 510  High (H) Flow: 300 – 30,000 ml/min
Volumetric  (Defender 510) ±1.0%
User-Selectable Measurement Units
Volumetric Flow mL/min, L/min, cc/min, cf/m
Approximate Time per Reading 1 to 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
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 Optimizer Collect software)
Data Cable 1 meter (Defender Data Port to PC Serial Port)
Protective Case Soft side or Pelican case available
Laboratory Accreditation Backed by ISO 17025 accreditation by NVLAP of NIST
Instrument Certification RoHS and CE Compliant
DryCal Defender 500 Kits Include:
One flow cell, Bios Optimizer 110 PC Serial Cable, Software CD, AC Power Adapter/Charger, Plastic Leak Test Caps (2), NIST-Traceable Calibration Certificate and Mini-Manual.

Defender Accessories

100-250 Pelican case for 1 Defender
100-251 Pelican case for 2 or 3 Defenders
100-112 PC card, adds serial port to laptop
100-222 Universal power supply 100-240 VAC/12 VDC, US plug unless UK, EU or AUS specified in notes
100-215 Optional plug, UK, EU or AUS
100-113 RS232 serial cable
100-413 Leak test caps (Pkg 10)

Additional information

Select flow range

L (5 500 ml/min, M (50 – 5000 ml/min), H (300 – 30000 ml/min

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