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WQ401 Dissolved Oxygen Sensor
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4-20mA Output Dissolved Oxygen Sensor WQ401
Fully encapsulated electronics, 4-20 mA output, Marine grade cable with strain relief, Stainless steel housing Replaceable DO element.
Product Description
The WQ401 dissolved oxygen sensor is a rugged reliable water oxygen level measuring device.
The sensor probe is mounted on 25' of marine grade cable, with lengths up to 500' available upon request. The dissolved
oxygen sensor output is 4-20 mA with a three wire configuration.
The electronics are completely encapsulated in marine grade epoxy within a stainless
steel housing. The sensor uses a removable shield and DO element for easy maintenance.
Dissolved oxygen (DO) refers to the volume of oxygen that the water contains. The quantity of oxygen that the water can hold depends on the temperature, salinity, and pressure of the water. Gas solubility increases with decreasing temperature (colder water holds more oxygen). Gas solubility increases with decreasing salinity (freshwater holds more oxygen than does saltwater). Finally, gas solubility decreases as pressure decreases. Thus, the amount of oxygen absorbed in water decreases as altitude increases because of the decrease in relative pressure.
Output: 4-20 mA
Range: 0-100% Saturation, 0-8 ppm, temperature compensated to 25c
Accuracy: +/-0.5% of full scale
Operating Voltage: 10-36 VDC
Current Draw: 15.5 mA plus sensor output
Warm Up Time: 10 seconds minimum
Operating Temperature: -40 to +55c
Size of Probe: 1 1/4" diameter x 11" long
Weight: 1 lb.
Membrane: 0.001 FEP Teflon (standard)
Combined Error: 2% FS