WQ401 Dissolved Oxygen Sensor Description
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.
WQ401 Dissolved Oxygen Sensor Features
| Output | 4-20 mA |
| Range | 0 to 100% saturation, 0 to 8 ppm, temperature compensated to 77°F (25°C) |
| Accuracy | ±0.5% full scale |
| Maximum Pressure | 40 psi |
| Operating Voltage | 10 to 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% full scale |
| Size of Probe Open Water |
1 ¼" dia. x 11" long (3.2cm dia. x 27.9 cm long) Online: 2" dia. x 12" long(5cm dia. x 30.5cm long) |
| Weight | 1 lb (454 g) |
| Order No. | Description |
| WQ401 | Dissolved Oxygen Sensor for Open Water (includes 25' cable) |
| WQ401-O | Online Dissolved Oxygen Sensor (with 1" NPT thread and 25' cable) |
| 00-740 | DO Element Replacement |
| WQEXC | Extra Sensor Cable, per foot (up to 500') |
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