Submersible Pressure Transducer for Level & Pressure
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Description |
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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 WL400 has a dynamic temperature compensation system, enabling high accuracy measurements over a wide temperature range. The sensor is easily adapted to all dataloggers, telemetry, monitoring equipment, and displays.
The WL400 consists of a
solid state pressure sensor encapsulated in a stainless steel submersible
3/4" diameter housing. The water level gauge has a molded-on
waterproof cable and a two-wire 4-20 mA high level output for connection to a
monitoring device. A 25' cable is standard, and optional cable lengths are
available up to 500' (WLEXC).
The Water Level Sensor's
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 (as is the case with other pressure sensors). The
level sensor uses a unique, highly flexible silicon diaphragm to interface
between water and the sensing element. This silicon diaphragm protects the
sensor's electronics from moisture and provides a sensor with exceptional
linearity and very low hysteresis. The design of Global Water's Level
Sensor eliminates the issues associated with metal foil diaphragms, which tend
to crinkle and stretch out over time causing drift, linearity, and hysteresis
problems. The sensor is also protected by a stainless steel micro-screen
cap, which makes fouling with silt, mud, or sludge virtually impossible.
Sensor 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 sensors typically have serious problems at low-level
ranges because of sensor crinkling, stretching, and drifting.
The WL400 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 sensor, so the WL400 can be
operated from common 12 VDC battery systems. The 4-20 mA signal can run up
to 3,000' from the sensor 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 Housing Cable The WL400's pressure sensor may be placed slightly below the lowest expected
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 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 sensor 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. The WL400 Water Level Sensor can be used to measure water level, well depth,
groundwater level, surface water flow, pipe flow, and water pressure. WLEXC
Extra Cable
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
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)
Conductors: 4 each 22 AWG
Jacket Material: 87A shore hardness Polyethylene
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')
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'.
Selecting the smallest water level range possible will ensure the
greatest accuracy. Includes 25 feet of 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.
WL400-WW Waste
Water Sensor
Viton membrane for harsh water environments. Accuracy 0.5% of full
scale.
additional
$50
WL400-PRP
Pressure Pipe Option
Sensor is housed in a 6" stainless steel pipe with 3/4" NPT
male thread 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.additional
$35
WL400-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.
additional
$60
EZ100
EZ Sensor Display
LCD readout display for both portable use and permanent installations.
additional
$295
WL15
Water Level Logger
Submersible pressure transducer and datalogger for recording water level
data.$795
