Bios Defender 530+ H Primary Standard Calibrator (300 to 30,000 ml/min)

Mesa Labs


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The Defender 530+ allows users to verify gas flow rates in the field or in the lab to an accuracy of ±1% percent for readings standardized for temperature and pressure and ±0.75% in the volumetric flow mode. Available with flow rates from 5 cc to 30 liters. Unlike thermal mass flow meters, the Defender 530+’s positive displacement technology provides immediate indication of actual volumetric gas flow rate – accurately and independently of gas type. Integrated temperature and pressure sensors in the flow stream allow users to automatically standardize volumetric flow readings to standard conditions, rather than just recording the values, for traceable verifications of mass flow devices.

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Defender 530+ Calibrator - Flexible Ways of Working

No matter your application, the portable Defender 530+ is ready to go to work for you, because it’s a true volumetric standard based on the principle of positive displacement.

The Defender 530+ provides immediate indication of the actual gas flow rate, accurately and independently of the gas type. It also includes integrated temperature sensors and pressure transducers in the flow stream, so you can compensate for standard conditions - allowing traceable verifications of mass flow devices. A versatile, push-button flow meter, the Defender 530+ is also a primary flow standard, enabling you to accurately calibrate a variety of instrumentation.

  • Reliable - 20 years of Proven DryCal Technology
  • Accurate - Backed by ISO 17025; NVLAP accredited
  • Portable - Lightweight and impact-resistant
  • Simple - Push button testing; no user interpretation or external calculations required

Featuring a number of quality and performance enhancements over traditional flow meter technologies, the Defender 530+ offers:

  • Quick Start Operation
  • Graphical LCD Display
  • User-selectable Flow Units and Time Intervals
  • Fully Customizable

530+ Series Model Options:

  • Defender 530+ L (Low Flow): 5-500 sccm
  • Defender 530+ M (Medium Flow): 50-5,000 sccm
  • Defender 530+ H (High Flow): 300-30,000 sccm


  • Approximate Time per Reading: 1-15 seconds
  • Reading Styles (with averaging function user-selectable from 1 to 100 measurement): Single (manual),
  • Continuous or Burst
  • Gas Compatibility: Non-corrosive, non-condensing, less than 70% humidity
  • Flow Modes: Pressure or Suction
  • Measurement Cell Style: Integrated
  • AC Adapter/Charger: 12V DC, >250ma, 2.5 mm center positive
  • Battery System: 6V rechargeable, sealed lead-acid, 6-8 hrs typical operation
  • Battery Operational Time (5 cycles/min): 3 hrs backlight on, 8 hrs backlight off
  • Pressure and Suction Fittings: 1/4” ID Swagelok compression fittings, 3/8” fittings on High Model
  • Warranty: 1 year; battery 6 months
  • Storage Temperature: 0-70o C
  • Ambient Humidity: 0-70%, non-condensing
  • Operating Pressure (Absolute): Atmospheric, 15 PSI Max
  • Display: Backlit
More Information
PN 200-530H
Manufacturer Mesa Labs
Battery Type Lead Acid Rechargeable Battery
Unit of Measure ea
Flow Rate 300 to 30,000 mL/min
Volumetric Accuracy ± 1% of reading
Calibrator Type Primary Standard
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