The design of the submersible pressure transducers eliminates the issues associated with metal foil diaphragms, which tend to crinkle and stretch out over time causing drift, linearity, and hysteresis problems. The water level sensor is also has automatically barometric compensation due to the attached vent cable and protected by a stainless steel micro-screen cap, which makes fouling with silt, mud, or sludge virtually impossible.
Pressure transducer level ranges of 0-3′, 0-15′, 0-30′, 0-60′, 0-120′ and 0-250′ are available.
The 0-3′ 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′ water monitoring sensor accurately measures small changes in water, even when the water’s depth is only a few inches deep. Other metal foil-type water level sensors typically have serious problems at low-level ranges because of sensor crinkling, stretching, and drifting.
• High accuracy and reliability
• Completely submersible pressure transducer and cable
• Compact, rugged design for easy installation
• Minimal maintenance and care
• Water level sensor compatible with most monitoring equipment
• 4-20mA output
• Vented cable for automatic barometric compensation
• Multiple level ranges available from 3′ to 250′
• Wet-wet water level sensor eliminates vent tube concerns
• Dynamic temperature compensation system
• Submersible pressure transducer not affected by foam, wind, or rain
Monitors levels in groundwater wells, rivers, streams, tanks, lift stations and open channels.
Each submersible pressure transducer has a two-wire 4-20 mA output signal that is linear with water depth. From 10 to 36 VDC is required to operate the water level sensor, so the level sensors can be operated from common 12 VDC battery systems.
The 4-20 mA signal can run up to 3,000′ from the submersible pressure transducer to the logging device. Common twisted pair or electrical extension cord wire may be spliced to the vented cable once the cable is out of the water. The 4-20 mA signal may be converted to 0.5 to 2.5 VDC by dropping the current signal across a 125 ohm resistor.
SPECIFICATIONS
Sensing Element
Sensor Element: Silicone Diaphragm,Wet/Wet Transducer
Pressure Range: 0-3′, 0-15′, 0-30′, 0-60′, 0-120′,0-250′
Linearity and Hysteresis:±0.1% FS
Accuracy:±0.1% of full scale at constant temperature,±0.2% over 35°F to 70°F range
Overpressure: 2 x full scale range
Burst Pressure: 10 x full scale range
Resolution: Infinitesimal (Analog)
Outputs: 4-20 mA or 0.5 to 2.5 VDC across 125 ohms
Supply Voltage: 10 to 36 VDC
Current Draw: Same as sensor output
Warm Up Time: 10 ms minimum
Operating Temperature: -40° to +185°F
Compensation: Uses dynamic temperature compensation 30-70 F. Automatic barometric pressure compensation
Weight: 1/2 lb
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 5 1/2″ long x 3/4″ diameter (small enough for a 1″ well)
Cable
Conductors: 4 each 22 AWG
Jacket Material: Marine Grade Polyurethane
Vent Tube Material: HD Polyethylene
Shield: Aluminum Mylar
Outer Diameter: .307″Temperature Range: -22° to +185°F
Weight: 0.7 oz/ft Length: Standard 25′ (up to 500′ from the factory)
Installation
The submersible pressure sensor may be placed slightly below the lowest expected water level. Water level sensor level ranges of 0-3′, 0-15′, 0-30′, 0-60′, 0-120′ and 0-250′ are available. When ordering, select the level sensor range that will cover the maximum water level change(this is not necessarily the total depth of water). Selecting the smallest water level range possible will ensure the greatest accuracy.
The 4-20 mA signal can run up to 3,000′ from the water level sensor to the logging device. Common twisted pair or electrical extension cord wire may be splicedto the vented cable once the cable is out of the water. The 4-20 mA signal may be converted to 0.5 to 2.5 VDC by dropping the current signal across a 125 ohm resistor.
Applications
The WL400 Water Level Sensor can be used to measure water level, well depth, groundwater level, surface water flow, pipe flow, and water pressure, etc…
Ordering Information:
WL400 Water Level Sensor When ordering, specify water level range that will cover the maximum water level change for your application (this is not necessarily the total depth of water): 0-3′, 0-15′, 0-30′, 0-60′, 0-120′, 0-250′, and 0-500′. NOTE: There is a extra charge for 0-500′ range sensor. Selecting the smallest water level range possible will ensure the greatest accuracy. Includes 25 feet of cable.
WLEXC Extra Cable Cable length is measured from top of logger to bottom of sensor. WL400 includes 25 feet of cable, and extra cable can be added up to 500 feet.
Titanium Option Replace the standard stainless steel water level sensor housing with titanium.
PRPP/PRPM Pressure Pipe Option Water level sensor is housed in a 8″ PVC (PRPP) or stainless steel pipe with 3/4″ NPT male thread (PRPM) for logging pressure in municipal water systems. 10′ cable standard. Calibrated in psi with ranges of 0 to 30 psi, 60 psi, 100 psi available.
WL-SWO Sewer Flow Option Mouse-shaped cover protects sensor from fouling and velocity effects in sewer, stormwater and irrigation pipe flows. Mouse is attached to 4″ X 24″ stainless steel strap for mounting sensor on pipe bottom.
WL-T Temperature Output Option Range: 0-50° C, Accuracy: 1% of reading, Output: 0-10mA
wl400-manual-2008