CS451 Stainless-Steel SDI-12/RS-232 Pressure Transducer
Stainless Steel
Ideal for long-term deployment in harsh conditions
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Visão Geral

O CS451 é um transdutor de pressão para medição de nível em canais, lagoas, fluxos e tanques. Possui gabinete robusto em titânio que permite uso em água salgada e outros ambiente agressivos. O CS451 gera sinal de saída digital SDI-12 ou sinal RS-232 para indicar pressão e temperatura observados. Esta saída pode ser lida por muitos de nossos dataloggers.

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O CS451 substitui o transdutor CS450. Os novos transdutores têm menor espaço entre as entradas de água e o diafragma, reduzindo a quantidade de ar aprisionado que o usuário precisa remover ao início do uso. Ar aprisionado causa deriva das leituras do transdutor pois o ar lentamente dissolve na água.

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Benefícios e Características

  • 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)

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Descrição Técnica

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 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 (see Ordering Information).

Especificações

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)

Compatibilidade

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

Dataloggers

Product Compatible Note
21X (retired)
CR10 (retired) The CR10 requires OS10-2:1 (PROM version 8929).
CR1000
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR295X (retired)
CR3000
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR6
CR800
CR850
CR9000 (retired)
CR9000X

Perguntas Frequentes Relacionadas

Number of FAQs related to CS451: 6

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

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

  3. 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. 

  4. 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.

  5. No. To prevent damage to the pressure transducer, it must be removed if freezing is anticipated.
  6. No. The A200 is only used to configure the CS451 and CS456 pressure transducers.


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