Measuring water quality parameters and viewing them in real-time.

The GSM data logger has been specifically developed to provide real-time communications for the T-Chain. It is a small, easily portable data logger that stores all data internally, and transmits them via GSM cell phone to a customer configured computer. The T-Chain is a water column monitoring device that is able to take a variety of water quality measurements.

• 24 bit resolution
• Variable transmission rates
• Internal memory
• Real-time data telemetry
• Software provided
• Internal Multimedia card
• Solar powered
• Internal battery
• RS232 connection

The T-Chain, a multi-use temperature string, can be supplied with a GSM Data logger,  small solar panel for power, and internal battery in case solar charging is unavailable for some time. The data logger controls all aspects of the T-Chain and telemetry. The calibration files are stored on the internal multimedia card as well as all sampling and telemetry configurations. The complete system includes a T-Chain, GSM data logger and solar panel. The GSM data logger must be located above the water surface.

The GSM data logger can be provided with a mount for installation purposes, or without one. PME uses this GSM logger with the LakeESP, so the mount was designed to specifically attach to the LakeESP. However, customers can determine their own set up for this logger. The logger was designed to be water resistant, but not waterproof.

The T-Chain, which is compatible with the GSM data logger, is able to monitor a variety of water quality parameters. Temperature sensors are moulded to the cable, which contains a thermistor within an Inconel protective tube. This allows for a fast response time and high accuracy. Dissolved Oxygen sensors are moulded to the T-Chain, but can be easily removed for cleaning. PAR sensors measure Photosynthetic Flux Density (PPFD). Pressure sensors are also moulded to the T-Chain. The Cyclops-7 sensors that Turner Designs offers are also available for the T-Chain.