Global Water WQ401 Dissolved Oxygen Sensor
Features
- Fully encapsulated electronics
- 4-20 mA output
- Replaceable dissolved oxygen element
- Free ground shipping
- Expedited repair and warranty service
- Lifetime technical support
- More
Overview
The Global Water WQ401 Dissolved Oxygen Sensor is a rugged and reliable water oxygen measuring device. The WQ401’s sensor is attached to 25 ft of marine grade cable, with lengths up to 500 ft available upon request. The sensor’s output is 4-20 mA with a three-wire configuration. The sensor’s electronics are completely encapsulated in marine-grade epoxy within a stainless steel housing. The unit uses a removable shield and dissolved oxygen element for easy maintenance.
Mechanics
As with all of Global Water’s 4-20 mA output sensors, users can add recording and controlling capabilities to the WQ401 with the GL500 Recorder and PC320 Controller. The GL500 connects to the dissolved oxygen sensor’s 4-20 mA output to record data, and the PC320 Controller connects to the sensor’s output to control pumps or alarms.
Output | 4-20 mA |
Range |
0-100% Saturation, 0-8 ppm, temperature compensated to 77°F (25°C) |
Accuracy | ±0.5% of full scale |
Maximum Pressure |
40 psi |
Operating Voltage | 10-36 VDC |
Current Draw |
15.5 mA plus sensor output |
Warm Up Time |
10 seconds minimum |
Operating Temperature | -40 to +131°F (-40 to +55°C) |
Membrane |
0.001 FEP Teflon (standard) |
Combined Error | -2% FS |
Size of Probe | 11" L x 1-1/4" Diameter (27.9 cm L x 3.2 cm Dia.) |
Weight | 1 lb. (454 kg) |
In The News
Stone Lab: Cyanobacteria Monitoring in Ohio Lakes
Microcystin, one of several toxins produced by the cyanobacteria that form harmful algal blooms (HABs), has become a popular topic of lake research as the human health impacts of HABs become better understood. Stone Lab is one of the leading groups in algal bloom research on Lake Erie and other lakes in Ohio. 
 
For more than 100 years, Stone Lab has conducted biology research and provided science education and outreach to the region. Over the years, thousands of individuals of varying ages have learned from the resources Stone Lab provides. 
 
Stone Lab’s Research Coordinator and Senior Researcher, Justin Chaffin, learned of Stone Lab while an undergraduate student at Bowling Green State University Fireland Campus.
Read MoreFrom Assessment to Angler: Continual Research Ensures Lake Erie Remains a Beacon of Freshwater Fishing
Lake Erie is well known for its abundant recreational fishing. Anglers come from across the country to try their luck at the “walleye capital of the world” and search for other freshwater species, such as bass, perch, and steelhead trout. 
 
 As one of the world’s largest freshwater fisheries, much effort is made behind the scenes to maintain fishing opportunities for visitors to enjoy year after year, efforts that often go unnoticed by the public. 
 
 One of the lake's most important economic and tourism centers is the city of Sandusky, home to the Sandusky Fisheries Research Station . As part of the Ohio Division of Wildlife, the unit serves as a base for assessing fish populations and managing harvest with partner agencies from around Lake Erie.
Read MoreHigh Definition Stream Surveys: Informed Management in Local Waterways
When it comes to environmental monitoring, new stream survey methodologies have revealed a great deal about water quality and streambed conditions over time. Such information can be particularly important in leading restoration initiatives and prioritizing management decisions. 
 
Historically, stream surveys have been conducted at a single point along the stream, with data then extrapolated for miles up and downstream. However, Brett Connell, Hydrologist and Director of Sales at Trutta Environmental Solutions, started developing a more intensive stream survey format in his master's program in 2010 at the University of Tennessee.
Read More