GLOBAL WATER WL-400 WATER LEVEL LOGGER

 

Global Water' s WL400 Water Level Sensor provides highly accurate water level measurement for a wide variety of applications, including those in severe environments. The submersible pressure transducers have a dynamic temperature compensation system, enabling high accuracy measurements over a wide temperature range. The water level sensor is easily adapted to all dataloggers, telemetry, monitoring equipment, and displays.
Each of the water level sensors consist of a solid state submersible pressure transducer encapsulated in a stainless steel 13/ 16 inch diameter housing. The water level sensor has a molded waterproof cable and a two-wire 4-20mA output for connection to a monitoring device. A 25 ft cable is standard, and optional cable lengths are available up to 500 ft.

The Water Level Sensor' s submersible pressure transducer is fully encapsulated with marine-grade epoxy so that moisture can never leak in or work its way down the vent tube to cause drift or level sensor failure. The sensor uses a unique, highly flexible silicon diaphragm to interface between water and the sensing element. This silicon diaphragm protects the water level sensor' s electronics from moisture and provides each sensor with exceptional linearity and very low hysteresis.

Water level ranges of 0-3, 0-15, 0-30, 0-60, 0-120, and 0-250 feet are available. The 0-3 ft low-level range is ideal for measuring shallow flows or small water level changes like those encountered in sewers, storm drains, weirs, and flumes. The 0-3 ft water monitoring sensor accurately measures small changes in water, even when the water' s depth is only a few inches deep.

Sensing Element
Sensor Element: Silicone Diaphragm, Wet/ Wet Transducer
Pressure Range: 0-3, 0-15, 0-30, 0-60, 0-120, 0-250, 0-500 ft
Linearity and Hysteresis: ± 0.1% FS
Accuracy: ± 0.1% of full scale at constant temperature, ± 0.2% over 35° F to 70° F ( 1.37° to 21.1° C) range
Overpressure: Not to exceed 2 x full scale range
Resolution: Infinitesimal ( Analog)
Outputs: 4-20 mA or 0.5 to 2.5 VDC across 125 ohms
Supply Voltage: 8 to 36 VDC
Current Draw: Same as sensor output
Warm Up Time: 3 seconds recommended
Operating Temperature: -40° to + 185° F ( -40° to + 85° C)
Compensation: Uses dynamic temperature compensation 30 to 70° F ( -1.1 to 21.1° C) . Automatic barometric pressure compensation
Weight: 1/ 2 lb ( 227 g)

Housing
Material: 304L Stainless Steel, SS microscreen ( hundreds of holes to prevent fouling) , electronics are fully encapsulated in marine grade epoxy, guaranteed not to leak
Size: up to 13/ 16 inch diameter x 5 1/ 2 in long ( 2 cm dia. x 14 cm long) ( small enough for a 1 inch ( 2.54 cm) well) . Titanium option has 1 inch ( 2.54 cm) diameter.
Vented Cable
Conductors: 4 each 22 AWG
Material: Marine grade polyether jacket, polyethylene vent tube, full foil shield
Outer Diameter: 0.306 inch ( 0.78 cm)
Temperature Range: -22° to + 185° F ( -30° to + 85° C)
Weight: 0.7 oz/ ft ( ~ 65g/ m)
Length: Standard 25 ft ( 7.62 m) ( up to 500 ft ( 152.4 m) from factory)