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RBRquartz⁴  BPR|zero

Bottom Pressure Recorder with AzeroA drift correction

The RBRquartz4 BPR|zero is a special version of the robust RBRquartz4 BPR implementing a novel AzeroA technique to correct for the long-term drift in the Paroscientific Digiquartz® 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 32Hz sampling
  • AzeroA drift verification
  • 10ppb resolution

Features & Configurations

Long Deployments

High Accuracy

Quartz Stability

UP TO 32Hz SAMPLING RATE

AzeroA DRIFT CORRECTION

10ppb RESOLUTION

The RBRquartz4 BPR|zero integrates one or two Paroscientific Digiquartz® 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 RBRquartz4 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 1.28 Billion readings
Power External: 9.5V to 30V
Communication Internal: USB-C External: RS-232/485, or Ethernet
Clock drift ±60 seconds/year
Depth rating 7000m
Housing Titanium
Size 402mm x Ø100mm
Weight ~7.4kg in air, 4.1kg in water
Temperature
Range -5°C to 35°C
Accuracy ±0.002°C
Resolution 0.00005°C
Typical stability 0.002°C/year
Time constant ~3 minutes
Depth
Range 1000 / 2000 / 4000 / 7000 dbar
Initial accuracy ±0.01% full scale
Resolution 10ppb (at 1Hz sampling rate)
Typical stability <1cm/year at 7000dbar (with AzeroA drift correction)

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