DeltaCal Calibrator for Ambient Federal Reference Method Samplers

Product Image of DeltaCal Calibrator for Ambient Federal Reference Method Samplers

BGI's DeltaCal is the first and only continuous volumetric flow calibration/audit device which gives a direct indication of volumetric flow rate, standard flow rate, barometric pressure (both mm/Hg & mb), ambient temperature, and filter temperature in one instrument. It was developed for use with U.S. EPA PM2.5 designated samplers and their PM10 derivatives. With an accessory adapter, it is usable with any air sampler in the 1.5 to 19.5 Lpm range. The DC100 version has a range of 10-60 Lpm. 

It is the only field audit/calibration device which meets the same temperature criteria as the EPA designated samplers themselves. The temperature range is -30° to 55° C (EPA requires up to 40° C). It is designed to go anyplace, indoors or out...

BGI stands by its first principle: venturi calibrators will operate for 20 continuous hours on four AA cells, and this calibrator does not vary from that principle. The heart of the deltaCal is of course the venturi, which is superior to an orifice in that it offers no sharp edges, which can be damaged, and a 90 percent recovery of the measurement pressure drop, important when calibrating some forms of speciation samplers or other critical orifice controlled devices. Because flow through the instrument is uninterrupted, our graphic software provides a continuous output display of all functions with both actual and standard flow rates. Pulsation free, accurate to less than 0.75 percent of the flow rate reading, NIST traceable and designed, built and calibrated in an ISO 9001:2008 facility. 


  • Calibration and audits of PM2.5 and PM10 samplers to U.S. EPA requirements
  • May be used on any sampler in the 1.5 to 19.5 Lpm range
  • Usable in field or laboratory
  • Calibration of European PM10 samplers operating at 38.4 Lpm
  • Calibration of 50 Lpm DICOT samplers
  • Calibration of standard DICOT samplers


  • One switch (off/on) operation -- all data displayed on screen
  • No moving parts, completely silent
  • 20 hour battery life (4-AA)
  • Furnished with universal power supply (120/240 VAC)
  • Download feature with supplied software

DeltaCal Specifications

Flow Rate Range 1.5-19.5 Lpm (Euro 10-60 Lpm)
Temp. operational range -30° C to 55° C
Temp. reading range -40° C to 55° C
Baro. pressure range 400 to 800 mm of Hg (U.S. version)
534 to 1066 millibars (Euro version)


Measuring Head 5 in. Max OD (12.7 cm) X 10 in. high (25.4 cm)
Control Module 8 in. high (20.3 cm) X 4 in. wide (10.15 cm) X 1.7 in. thick (4.32 cm)
Combined Weight 2.2 lbs (1 kg)

Hand-Held Temperature Probe

Length of Cable 33 in (83.8 cm)
Length of Probe 5 in. (12.7 cm)

Carrying Case

Dimensions 18 in. wide (45.7 cm) X 13 in. high (33 cm) X 7 in. thick (17.8 cm)
Weight Complete with Contents 5.5 lbs (2.5 kg)

Ordering Information

BX-307 deltaCal (calibration range 1.5-19.5 Lpm), Complete in Carrying Case


DeltaCal Manual (English, PDF)

DeltaCal Manual (Spanish, PDF)

DeltaCal Calibrator for Ambient Federal Reference Method Samplers
Item # BX-307 

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Product Image of DeltaCal Calibrator for Ambient Federal Reference Method Samplers