CS451 Stainless-Steel SDI-12/RS-232 Pressure Transducer
Stainless Steel
Ideal for long-term deployment in harsh conditions
weather applications supported water applications supported energy applications supported gas flux and turbulence applications supported infrastructure applications supported soil applications supported

Overview

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.

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.

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Benefits and Features

  • Quality construction ensures product reliability
  • Rugged stainless-steel case protects piezoresistive sensor
  • Compatible with most Campbell Scientific data loggers
  • 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)

Images


Specifications

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.)
Cable Outer Diameter
  • 0.589 cm (0.232 in.) nominal
  • 0.599 cm (0.236 in.) maximum
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

Air Gap

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

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)

Compatibility

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Data Loggers

Compatible Note
21X (retired)
CR10 (retired)
CR1000
CR1000X
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR23X (retired)
CR295X (retired)
CR300
CR3000
CR310
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR6
CR800
CR850
CR9000 (retired)
CR9000X

Downloads

CS45x Firmware v.4 (472 KB) 22-03-2016

Includes the current firmware for the CS451 and CS456.

View Revision History

Articles and Press Releases

FAQs for

Number of FAQs related to CS451: 6

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  1. The CS45x-series pressure transducers are suitable for monitoring lake levels. However, be sure to submerge the pressure transducer below the frost line. If ice forms against the diaphragm, it will deform the diaphragm and cause permanent damage.

  2. Yes, but a data logger is required. The CS45x-series pressure transducers are not autonomous. They require a data logger to initiate and retrieve a measurement. The data logger can initiate an event-based measurement.

    In contrast, the CRS45x-series water-level recording sensors support event-based recording using built-in data-collection features. 

  3. No. Because of the SDI-12 protocol, the CS45x-series pressure transducers can only make measurements every 1.5 seconds.

  4. No. A data logger must be used with the CS45x-series pressure transducers.

  5. No. The A200 is only used to configure the CS451 and CS456 pressure transducers.

  6. No. To prevent damage to the pressure transducer, it must be removed if freezing is anticipated.