Detailed Description

The CRS451 has several pressure range options. The CRS451 is unvented; therefore it is monitoring sealed gage pressure. For maximum accuracy, the data should be corrected for barometric pressure.

HydroSci software is available for download. This software simplifies the process of configuring the CRS451. Users can configure the CRS451 to monitor surface water, ground water, or a standard pump test.

HydroSci software will also compensate the measurements for barometric pressure using an additional CS451 or a CS456 as a reference sensor, or using a barometric pressure sensor from a nearby weather station.

HydroSci software will display the data in tabular or graphical formats.


Venting Unvented
Measurement Time < 1 s
Output Options micro USB
Internal Data Collection Memory 4 MB
Logging/Scanning Modes Standard, Delta, Wave, Logarithmic
Resolution 0.0035% FS
Dry Storage Temperature Range -10° to +80°C

WARNING: Sensor could be damaged if encased in frozen ice.

Operating Temperature Range 0° to 60°C

WARNING: Sensor could be damaged if encased in frozen ice.

Overpressure 2 x pressure range
Power Requirements Internal user-replaceable lithium battery
Water-Level Accuracy ±0.1% full-scale-range TEB

Includes the combined errors due to nonlinearity, hysteresis, nonrepeatability, and thermal effects over the compensated temperature range, per ISA S51.1.

Battery Life 5 years (when logging interval is once per hour)
Body Material 316L stainless steel
Temperature Accuracy ±0.2°C
Diameter 2.22 cm (0.875 in.)
Length 22.23 cm (8.75 in.)
Weight 230 g (0.51 lb)
Power Consumption
Quiescent < 80 µA
Measurement/Communication 4 mA (1 s measurement)
Measurement Ranges at Fresh Water Depths
0 to 5.1 m (16.7 ft)
  • 0 to 7.25 psi
  • 0 to 50 kPa
0 to 10.2 m (33.4 ft)
  • 0 to 14.5 psi
  • 0 to 100 kPa
0 to 20.4 m (67 ft)
  • 0 to 29 psi
  • 0 to 200 kPa
0 to 50.9 m (167 ft)
  • 0 to 72.5 psi
  • 0 to 500 kPa
0 to 102 m (334.5 ft)
  • 0 to 145 psi
  • 0 to 1000 kPa



Requires a micro USB cable and HydroSci software running on a computer with Windows XP or later. HydroSci software is available for download.