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CS451 Stainless Steel Pressure Transducer

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 data loggers.
Water | Level Measurement & Monitoring | Campbell Scientific

The CS451 consists of a piezoresistive sensor and a temperature sensor housed in a 316L stainless-steel case. It has a rugged Hytrel cable that remains flexible, even under harsh environmental conditions. The cable incorporates a vent tube to compensate for atmospheric pressure fluctuations. The vent tube terminates inside a desiccant tube, which prevents water vapor from entering the inner cavity of the transducer. The sensor ships with a desiccant tube that can be replaced in the field.

The CS451 has several pressure range options and two accuracy options (see Ordering Info). The standard accuracy option provides ±0.1% FS TEB over the 0° to 60°C temperature range. The high accuracy option provides ±0.05% FS TEB over the 0° to 60°C temperature range and includes a calibration certificate. TEB is the combined errors due to nonlinearity, hysteresis, non-repeatability, and thermal effects over the compensated temperature range, per ISA S51.1. Please note that the high accuracy option is not available for the 0 to 2.9 psig range option.

Campbell Scientific offers the A150 Desiccated Case that allows the CS451 to be connected to a  prewired enclosure

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 -40° to +100°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
Ingress Protection Exceeds IP68
Diameter 21.34 mm (0.84 in.)
Standard Accuracy Option ±0.1% full-scale-range TEB
High Accuracy Option ±0.05% full-scale-range TEB
Max. 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
Max. Cable Length (RS-232) 60 m (200 ft)

 

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