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Quest  Shanghai

Quest Singapore


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BIOS International Corp

DryCal ML-350

  • Simple Push-button Operation
  • Hands-Free Auto-Mode
  • Compact
  • NIST-Traceable
  • Patented Graphite Piston Assembly


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DryCal ML-500

  • Primary Gas Flow Calibrator
  • Broad Measuring Range from 5.0 sccm to 50 slm per minute
  • Automatic Sampling
  • Built-In Leak Test

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DryCal DC-2

  • Primary Gas Flow Calibrator
  • Broad Measuring Range from 1ml to 50,000 lm per minute
  • Automatic Sampling
  • Built-In Leak Test


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AirPro Surveyor

  • Portable Dual-Channel Air Sampler
  • Handles high flow rates and back pressures for short-term task sampling (1000 ml/min total flow at up to 80 in. H2O for up to ten hours)
  • Performs long-duration sampling for ambient air assessment (up to 500 ml/min total flow at up to 80 in./ H2O for up to 16 hours)
  • Integrated Tube Holder System


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AirPro Sentry II

  • Sequential Sorbent Tube Sampler
  • Single Channel model samples 24 tubes sequentially for long-term site evaluation, time profiling, ambient hazard or indoor air quality sampling
  • Dual-Channel model allows for 12 sequential sample pairs
  • Built-In Mass Flow Meter


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