iconUSB-BAR20: Precision barometer
USB-connected barometer for precise measurement and logging of atmospheric pressure or altitude.
69.95 $ CAD
(approx. 55.30$ USD )

Product Description:

This USB-connected barometer allows for precise measurement of atmospheric pressure (1 to 120 kPa) or altitude. Thanks to the use of a high resolution ADC (24-bitΔΣ), very small changes in atmospheric pressure can be sensed. If used to compute altitude, variations as small as 10cm can be detected. Designed as a compact USB-Key form factor for easy integration even in space-constrained applications.

  • Atmospheric sensor specs:
    • Range: 1 to 120 kPa (10 to 1200 millibar)
    • Accuracy: ±0.15 kPa at 25 °C (1.5 millibar)
    • Resolution: 0.0065 kPa (0.065 millibar)
    • Internal factory calibrated coefficients
  • Internal[1] temperature sensor (typ. -0+3°C at 25°C)
  • Communication: USB
  • Operating temperature: -20°C to +70°C.
  • Enclosure: ABS Plastic, USB-key form factor.


  • Supported by our free QTenki data logger software.
    • Operates under Windows (XP, Win7/8/10 64&32-bit) and Linux.
    • Configurable log file format and interval as low as one second.
    • Simultaneous use of multiple Dracal sensors supported.
    • Command-line tools included.
  • Can also be used in LabView2 (Guide here)

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Ships within 3 business days (*)
Item #DescriptionPriceAvailabilityAdd to cartcart
USB-BAR20 USB Precision barometer $69.95 In stock
Note: Prices are in canadian dollars (CAD) and may change without prior notice. If necessary, currency conversion will be done automatically by PayPal.

*: Orders are normally prepared and shipped within 3 business days. The transit time varies according to the country of destination, but between 4 and 10 business days are typical. Business days are Monday to Friday, with the exception of holidays (Canadian or in the distination country).

Download(s) & Link(s):
QTenki software (Windows/Linux) for our USB sensor productsView

[1] The internal temperature sensor is used for temperature compensation of the barometric sensor. It has a (non-constant and non-linear) temperature offset and cannot be calibrated, but its reading is available for applications where this is understood and acceptable.

[2] LabVIEW is a trademark of National Instruments. Neither Dracal Technologies inc., nor any software programs or other goods or services offered by Dracal Technologies inc., are affiliated with, endorsed by, or sponsored by National Instruments.

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