Campbell Scientific CS451

The CS451 is a pressure transducer with a a stainless-steel case. It is used for water-level measurements and can be submerged in most canals, wells, ponds, lakes, and streams. The CS451 outputs either a digital SDI-12 or RS-232 signal to indicate observed pressure and temperature. This output can be read by many of our dataloggers. 

The CS451 replaces the CS450 transducer. The new transducers have a smaller gap between the water ports and the diaphragm so that less air is trapped that the user must remove during deployment. Trapped air causes the transducer's readings to drift as the air slowly dissolves into the water.

For more information go to: https://www.campbellsci.com/cs451

Benefits and Features

  • Quality construction ensures product reliability
  • Rugged stainless-steel case protects piezoresistive sensor
  • Compatible with most Campbell Scientific dataloggers
  • Fully temperature-compensated
  • Low-power sleep state between measurements reduces power consumption
  • Optional weighted nose cone facilitates submersion
  • NPT fitting allows it to be used in closed-pipe applications
  • Quick shipment after receipt of order (ARO)
CS451
Measurement Time < 1.5 s
Output Options SDI-12 (version 1.3) 1200 bps; RS-232 9600 bps
Water-Level Resolution 0.0035% FS
Worst-Case Temperature Resolution 0.006°C
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.
Temperature Accuracy ±0.2°C
Overpressure 2 x pressure range
Power Requirements 6 to 18 Vdc
Cable Type Hytrel Jacket, five conductor, 26 AWG
NPT Fitting 1/4-in. NPS
Top Cone Material Delrin
Body Material 316L stainless steel
Element Material 316L stainless steel
Distance
  • 2.54 cm (1 in.) 
    Distance from black line etched on housing to end of NPT fitting
  • 2.3 cm (0.9 in.) 
    Distance from black line etched on housing to end of standard nose cone
  • 9.9 cm (3.9 in.) 
    Distance from black line etched on housing to end of weighted nose cone
Diameter 21.34 mm (0.84 in.)
Length 213.36 mm (6.875 in.)
Cable Weight 0.0421 kg/m (0.0283 lb/ft)
Weight 0.17 kg (0.37 lb) without cable

Power Consumption

Quiescent < 50 µA
Measurement/Communication 8 mA (1 s measurement)
Maximum 40 mA

Measurement Ranges at Fresh Water Depths

0 to 2.0 m (6.7 ft)
  • 0 to 2.9 psig 
    The high accuracy (±0.05% FS) option is not available for the 0 to 2.9 psig range option.
  • 0 to 20 kPa 
    The high accuracy (±0.05% FS) option is not available for the 0 to 2.9 psig range option.
0 to 5.1 m (16.7 ft)
  • 0 to 7.25 psig
  • 0 to 50 kPa
0 to 10.2 m (33.4 ft)
  • 0 to 14.5 psig
  • 0 to 100 kPa
0 to 20.4 m (67 ft)
  • 0 to 29 psig
  • 0 to 200 kPa
0 to 50.9 m (167 ft)
  • 0 to 72.5 psig
  • 0 to 500 kPa
0 to 102 m (334.5 ft)
  • 0 to 145 psig
  • 0 to 1000 kPa

Accuracy

Standard Accuracy Option ±0.1% full-scale-range TEB 
Total Error Band (TEB) includes the combined errors due to nonlinearity, hysteresis, nonrepeatability, and thermal effects over the compensated temperature range, per ISA S51.1.
High Accuracy Option ±0.05% full-scale-range TEB 
The high accuracy (±0.05% full-scale range) option is not available for the 0 to 2.9 psig range option. 

Total Error Band (TEB) includes the combined errors due to nonlinearity, hysteresis, nonrepeatability, and thermal effects over the compensated temperature range, per ISA S51.1.

Maximum Cable Length

SDI-12
  • ~457 m (1500 ft) 
    1 sensor connected to a single port
  • 60 m (200 ft) 
    10 sensors connected to a single port
RS-232 60 m (200 ft)

Air Gap

Standard & Weighted Nose Cone 0.653 cm (0.257 in.)
NPT Fitting 2.72 cm (1.07 in.)

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