DSA3218 Pressure Scanner – Gas Measurement

Features and Specifications

  • +/- .05% full scale long term accuracy
  • Rugged case
  • 1/16, 1/8, and 1/4 inch Swagelok input fittings
  • 500Hz/channel sampling speed
  • Multiple pressure ranges available per DSA
  • Vacuum, 5 inch H20 up to 750 psid pressure range
  • Auto zero offset correction


The model DSA3218 is a rugged 16 channel pressure scanner in an environmental case.  It measures up to 16 gas pressures in many applications. It can accept copper, steel or plastic tubing with either 1/16, 1/8, or 1/4 inch Swagelok® compression fittings. Available options include a common reference pressure or individual reference pressures per sensor. With its optional internal heater, it can operate down to -55 deg F environments.

Applications include gas turbine testing, compressor testing as well as other turbomachinery tests,including refrigeration compressor testing, etc.


The DSA3200 series pressure acquisition systems represent the next generation of multi-point electronic pressure scanning. Model DSA3218 Digital Sensor Array, incorporates 16 temperature compensated piezoresistive pressure transducers with a pneumatic calibration valve, RAM, 16 bit A/D converter, and a microprocessor in a compact self contained module. The result is a network-ready, Ethernet pressure scanning module.

The microprocessor compensates for temperature changes and performs engineering unit conversion. The microprocessor also controls the actuation of an internal calibration valve to perform on-line zero and multipoint calibrations. This on-line calibration capability virtually eliminates sensor thermal errors with a long term system accuracy of ±.05% FS (5 psi & up).

Pressure data are output in engineering units via Ethernet using TCP/IP protocol.

Scanivalve offers an optional multi-range calibration. This allows the DSA modules to have multiple pressure ranges. The calibration valve and transducers are manifolded in groups of 8. The user can specify up to 3 pressure ranges within that group of 8 as long as the ratio for all 3 full scale ranges doesnt exceed 3:1 from highest to lowest range.



(Click photo to enlarge)