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This is only sold buy Messa Labs from now on.



The Bios Defender is the next generation Drycal DC-Lite dry flow meter design that provides users with a primary flow standard for industrial hygiene, environmental and laboratory applications.

Bios Defender

The Bios Defender, at a Glance
Proven – percent of reading accuracy is supported by ISO 17025 accreditation by NVLAP of NIST

  1. Integrated temperature sensors and pressure transducers – placed directly in the flow stream for optimum standardized results (Bios Defender 520)

Lighter and more robust than its predecessors – ideal for field use

  1. Housed in a molded case with rubber handgrips for a better feel and a sleeker, more contemporary look

  2. Navigation menu and a large, illuminated graphical display with zoom feature, rated for extreme cold operation, down to -20 degrees C

  3. RoHS compliant for Europe (Restriction of Hazardous Substances)

Choose between flow units – mL, L, cc, or cfm

  1. Include up to one hundred readings in a group average

  2. Take individual readings, continuous hands-free readings, or set to read in time intervals, anywhere from one minute up to sixty minutes between readings

  3. Available in two models for application expansion – use the Bios Defender 510 to calibrate personal air samplers and other volumetric instruments, or the Bios 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

  4. Software – an integrated serial PC interface and software for bullet-proof transfer of flow data to a text file, and automatic recording and graphing of flow measurements. A software upgrade is available for the creation of air sampler profiles, sampler calibration data recording and storage, calibration report printing, and other capabilities

The Bio Defender is available in the following configurations:


Defender 520


Product # Defender
Shipping Weight 3.00 lbs
U/M Each
Stock Status Normally Ships within 24 hours
$Call for Pricing


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