RBRquartz3 BPR|zero

Bottom Pressure Recorder with AzeroA drift correction

The RBRquartzยณ BPR|zero is a special version of the robust RBRquartzยณ BPR implementing a novel AzeroA technique to correct for the long-term drift in the Paroscientific Digiquartzยฎ pressure gauge . This instrument is intended for deep, long-term deployments, where high stability and resolution of absolute pressure measurements are critical.

  • Long deployments
  • High accuracy
  • Quartz stability
  • Up to 8Hz sampling
  • AzeroA drift verification
  • 10ppb resolution
RBRquartzยณ BPR|zeroRBRquartzยณ BPR|zero interior view

Features & Configurations

Long Deployments

High Accuracy

Quartz Stability

UP TO 8Hz SAMPLING RATE

AzeroA DRIFT CORRECTION

10ppb RESOLUTION

The RBRquartzยณ BPR|zero integrates one or two Paroscientific Digiquartzยฎ pressure gauges, an internal quartz barometer, and a switching valve. The AzeroA drift correction technique periodically activates the switching valve to perform reference measurements of internal housing pressure. The resulting long-term drift is several hundred times lower than with uncompensated measurements.

The RBRquartzยณ BPR|zero requires external power to operate the valve, and can use RBRfermata underwater battery canisters, or connect via cable to an observatory for external power and realtime data access.

Specifications

Physical
Storage 240M readings
Power Internal: 8 AA cells External: 9.5V to 30V
Communication Internal: USB-C External: RS-232/485, or Ethernet
Clock drift ยฑ60 seconds/year
Depth rating 7000m
Housing Titanium
Size 788mm x ร˜140mm
Weight ~30kg in air, 18kg in water (single pressure unit, with batteries)
Temperature
Range -5ยฐC to 35ยฐC
Accuracy ยฑ0.002ยฐC
Resolution 0.00005ยฐC
Typical stability 0.002ยฐC/year
Time constant ~3 minutes
Depth
Range 1000 / 2000 / 4000 / 7000 dbar
Initial accuracy ยฑ0.01% full scale
Resolution 10ppb (at 1Hz sampling rate)
Typical stability <1cm/year at 7000dbar (with AzeroA drift correction)

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