Offering analog, Modbus, and SDI-12 communications
Overview
The ClariVue™20 is an ISO 7027-compliant, submersible, 90-degree, side-scatter turbidity sensor in a rugged titanium housing, making it the ideal choice for highly corrosive environments. The side-scatter turbidity measurement can be used as a surrogate for suspended sediment concentration (SSC) in aquatic ecosystems. The sensor returns data via SDI-12, analog, or Modbus to a data logger or controller for easy integration into your new or existing system.
Read MoreBenefits and Features
- Accurate measurement of suspended solids and turbidity to the industry standard 4000 FNUs
- Field-proven performance and reliability in a compact, low-power probe
- Compatible with modern Campbell Scientific data loggers and third-party systems
- Titanium housing for long-term deployment in the harshest of environments
- Wet-mateable connector allows for flexible installation without the worry of water ingress
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Technical Description
The ClariVue 20 is designed to operate in fresh and saline environments. The sensor face is made from titanium to slow biological growth over the optical windows; however, the sensor requires regular maintenance to keep the optical window clean in high bio-fouling environments.
Caution: The ClariVue 20 may become damaged if it is encased in frozen liquid.
Specifications
| Standards | Meets ISO 7027-1:2016 (side scatter) standard for turbidity measurements |
| Signal Type | SDI-12 v1.4, Modbus through RS-485, or analog |
| Operating Temperature Range | -2° to +40°C (28° to 104°F) |
| Analog Signal Output | 0 to 1 Vdc |
| Power Requirements | 9.6 to 18 Vdc |
| Measurement Range | 0 to 4000 FNU |
| SDI-12 Measurement Response Time |
12 to 28 s depending on the SDI-12 command (Refer to the manual for more information.) |
| Resolution | 0.2 FNU |
| Particle Size | 0.1 to 0.5 μm |
| Accuracy | ±2% or 0.5 FNU, whichever is greater |
| Housing Material | Titanium |
| Head Material | Titanium |
| Optics | Sapphire lens |
| Connector Description | MCBH-5-FS, titanium, six gold-plated pins, wet-mateable |
| Cable Type | Six-conductor, polyurethane jacket with water block |
| Optical Assembly | Sealed with double O-rings |
| Internal Temperature Measurement | ±0.2°C (±0.4°F) accuracy |
| Maximum Depth | 500 m (1,640 ft) |
| Sensor Diameter | 3.0 cm (1.2 in.) |
| Sensor Length | 16.6 cm (6.5 in.) |
| Sensor Weight | 200 g (0.44 lb) |
Power Consumption |
|
| Initial Measurement | 32 mA (30 s) |
| Idle | 0.75 mA |
| Measurement | 32 mA |
Related Documents
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Downloads
ClariVue 20 Program Examples v.1 (3 KB) 20-11-2024
Three programs are included for the ClariVue 20 submersible turbidity sensor. One program uses the M1! SDI-12 command to make measurements and calculate turbidity statistics (median, mean, standard deviation, minimum, maximum) and mean temperature. A second program uses an analog differential voltage measurement to read the ClariVue 20. Because the analog output requires the sensor to continuously measure turbidity and power the DAC, the sensor will not go to a low power state while in this mode. Subsequently, the current draw is significantly higher with analog out than with the digital protocols. A third program uses Modbus to communicate with the sensor. When using Modbus, the ClariVue 20 can go into low power mode between measurements, which may require sending a command to wake the sensor before making another measurement. These programs were written for a CR1000Xe, but other dataloggers are programmed similarly. Voltage ranges, channel numbers, or other parameters may need to be changed to reflect the specifications of the datalogger.