CS451 压力变换器
不锈钢材质
适合于严酷条件下的长期配置
气象 应用支持 水资源 应用支持 能源 应用支持 湍流通量 应用支持 基础结构/工业设施 应用支持 土壤 应用支持

概览

CS451是不锈钢压力传感器,用于测量水位。适合于沟渠、水井、水塘、海湾、湖泊、溪流、水箱等环境。CS451同时测量压力和温度,输出方式为SDI-12或RS-232,可以被我们大多数的数据采集器所读取。

CS451替换了CS450变换器。新变换器的通水口与隔膜之间的空档距离更小,在安装时必须排空其中聚集的空气。空档中聚集的空气会使得测量结果漂移,因为空气会慢慢溶解到水中。

优势与特点

  • Quality construction to ensure product reliability
  • Rugged stainless-steel case protecting the piezoresistive sensor
  • Compatible with most Campbell Scientific data loggers
  • Fully temperature-compensated
  • Low-power sleep state between measurements to reduce power consumption
  • Optional weighted nose cone to facilitate submersion
  • Optional NPT nose cone to enable usage in closed-pipe applications
  • Quick shipment after receipt of order (ARO)

图像

CS451 with standard nose cone
CS451 with standard nose cone
CS451 with standard nose cone
CS451 with 1/4 in. NPT nose cone
CS241 with weighted nose cone

技术说明

CS451的316L不锈钢外壳里含有一个压阻传感器和一个温度传感器,配有结实的Hytrel线缆,即使在严酷条件下也非常柔韧。线缆内合并了一个通风管,用于补偿大气压的波动。通风管的末端连接干燥管,阻止了水汽进入变换器的内腔中。

CS451有几个压力量程选项和两个精度选项(参阅订货信息)。标准精度选项提供了 0° to 60°C温度范围内的 ±0.1% FS TEB,并包括校准认证。TEB为由补偿温度范围内的非线性、滞后性和热效应的组合误差,每ISA S51.1。请注意高精度选项不适用于 0 到 2.9 psig 量程。

Campbell Scientific提供A150干燥箱,让CS451可以连接到一个预接线的机箱(参阅订货信息)。

产品规格

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
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)

兼容性

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

数据采集器

Product Compatible Note
21X (retired)
CR10 (retired) The CR10 requires OS10-2:1 (PROM version 8929).
CR1000X
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR295X (retired)
CR300
CR3000
CR310
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR6
CR800
CR850
CR9000 (retired)

常见问题解答

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. 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.

  3. No. To prevent damage to the pressure transducer, it must be removed if freezing is anticipated.
  4. 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. 

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

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

案例研究

澳大利亚:甘蔗土壤养分监测
The Silkwood sugarcane water-quality monitoring site was established in 2014 as part of the Paddock......阅读更多

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