Global Water GL500-2-1 Data Logger
- Rugged and easy to use
- Records over 81,000 readings
- Accepts any 4-20 mA signal
|FR0000||GL500U-2-1 data logger, USB|
|Usually ships in 1-2 weeks|
The GL500-2-1 Data Logger features two analog channels and one pulse channel for recording data. The data logger records over 81,000 readings and has four unique recording options: fast (10 samples per second), programmable interval (1 second to multiple years), logarithmic, and exception. Start and stop alarm times can be programmed to synchronize multiple loggers, delay sampling until a preset time, or limit the number of recordings during a day. The GL500U-2-1 USB model is great for direct connection to a laptop or desktop PC.
The GL500-2-1 can monitor two 4-20mA sensors and features a scalable digital input that accepts switch closure signals and pulses from various external devices. The logger provides switched power to the sensors based on the programmable sample interval and sensor warm up time settings. Two- and three-wire sensors can be quickly connected to the datalogger’s internal terminal strip and calibrated via the included Global Logger II software.
The GL500-2-1 includes Global Logger II Windows software, which allow for easy setup, calibration, upload, and transfer to a spreadsheet program. NOTE: 64 bit operating systems are not currently supported.
- (1) GL500U-2-1 Data Logger
- (1) USB Cable, Type A to B
- (1) Global Logger Interface Software CD
- (1) Operations Manual
In The News
In 2012, for maybe the first time, Lake Superior got scummy.
Visitors to the Apostle Islands National Lakeshore reported algae washing up on shore around the park.
It was a marked shift for the park, made up of a portion of the Lake Superior lakeshore and nearby islands. The water surrounding the park is cold, clear and typically low in nutrients: a combination unlikely to result in algal blooms.
But, in 2012 and again in 2018 after violent storms, major algal blooms—ones observed over multiple days—washed ashore and clogged the beaches with unsightly, scummy algae.
Not the usual suspects
The algal blooms of Lake Superior are not the algal blooms of warmer, more nutrient-rich lakes like Lake Erie.Read More
*This is part two of a series on changing ancient lakes. See part one, Lake Baikal, here .
Ancient lakes are facing a suite of rapid, unprecedented anthropogenic changes. While ancient lakes are spread around the world and vary widely from lake to lake, their incredible age, which can reach into the tens of millions of years, makes them unique resources to science.
They host incredible biodiversity and long sediment records. They are vital sources of food and water for millions of people. In a changing world, ancient lakes’ value as scientific and natural resources and the incredibly diverse life they contain is under threat.Read More
*This is part one of a two part story on ancient lakes. Part two , Lake Tanganyika, available here.
Lakes that have supported human settlements for thousands of years are starting to feel humans’ effects in rapidly developing and significant ways.
From climate change to nutrient loading to plastic pollution, ancient lakes are straining under some of the least welcome contributions of humanity. The changes could have consequences for the diversity of life within the lakes and the human populations that rely on it.
And, while ancient lakes have been around long enough to weather past climatic changes, the changes occurring now are so rapid, the end result is uncertain.Read More