Long Deployments
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


Features & Configurations
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
Storage | 240M readings |
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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 ร140mm |
Weight | ~30kg in air, 18kg in water (single pressure unit, with batteries) |
Range | -5ยฐC to 35ยฐC |
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Accuracy | ยฑ0.002ยฐC |
Resolution | 0.00005ยฐC |
Typical stability | 0.002ยฐC/year |
Time constant | ~3 minutes |
Range | 1000 / 2000 / 4000 / 7000 dbar |
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Initial accuracy | ยฑ0.01% full scale |
Resolution | 10ppb (at 1Hz sampling rate) |
Typical stability | <1cm/year at 7000dbar (with AzeroA drift correction) |
