C-Star Transmissometer
The instrument is capable of either free space measurements, or through the use of an optical flow tube, flow-through sampling with a pump. It can be used in profiling, moored, or underway applications.
- 14 bit analog and digital output
- Outputs calculated attenuation
- ECOView software included
- Compatible with previous generations
- Optional flow tube
- 10 and 25 cm pathlengths available
- Available in 6000 meter depth rating
- Easily interfaced
- Available in multiple wavelengths
MECHANICAL
| 25 cm pathlength | 47 x 6.4 x 9.3 cm |
| 10 cm pathlength | 29.2 x 6.4 x 9.3 cm |
| Weight in air | 2.2 kg (plastic) 3.6 kg (aluminum) |
| Weight in water | 0.9 kg (plastic) 2.7 kg (aluminum) |
ELECTRICAL
| Power input | 7–15 VDC |
| Current draw | <35 mA (typ); 50 mA (max) |
| Data output | 0-16380 counts (0-5 V) |
| Output resolution | 14 bit |
| Sample rate | to 8 Hx |
ENVIRONMENTAL
| Rated depth: | 600 m (plastic) 6000 m (aluminum) |
| Temperature error | 0.02 percent F.S/deg C |
| Operating range | 0-40 deg C |
| Long term stability | 0.02 percent F.S./ Hr |
OPTICAL
| Pathlength | 25 or 10 cm |
| Wavelengths | 370, 470, 530 or 650 nm |
| Acceptance angle | ~ 1 deg |
| Bandwidth, 470, 530, 660 nm | ~ 20 nm |
| Bandwidth, 370 nm | ~ 10-12 nm |
| Linearity | 99% R2 |
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How do I clean the optical surfaces on my transmissometer?
Functional Checks and Cleaning Methodology for WET Labs Transmissometers Download PDF
My new C-Star has a 6-contact bulkhead connector. How do I get an adapter cable to connect it to my existing system?
The standard bulkhead connector for C-Stars is a 6-pin bulkhead connector. This replaces the 4-socket connector previously used. Download PDF techniacal note.
What should I use to lubricate bulkhead connectors?
WET Labs recommends keeping the connectors on your meter lubricated using a good quality silicone spray lubricant, such as 3M Silicone Spray or Loctite 8021 spray. These can be purchased at your local hardware store. Avoid silicone grease. It is messy and attracts contaminants.
Do not use WD-40. It will destroy connectors.
Do you want WET Labs to review your data?
In order for data questions to be answered in an efficient manner, WET Labs requests:
- The serial number of the instrument data in question. The most current calibration information
can be verified and the instrument settings upon delivery can be checked.
- Description of the deployment configuration. Questions to consider:
- What are the current instrument settings?
- What is the instrument orientation?
- Are there possible obstructions?
- Is it being used in a mooring, a profiler, or being towed?
- What were the deployment date and geographical location?
- How far into the deployment was the problem seen?
- What power supply and cabling are being used?
- What was the instrument condition during the last field service or retrieval?
- Do you have any pictures?
- Raw data files of the physical data in question
- examples of good raw data.
- examples of questionable raw data .
- Information about how the raw data was processed.
