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Catalog:Water Level Monitoring 
Global Water - Water Level Logger (WL300) Global Water - Water Level Sensor (WL300) Pressure Transducer/Datalogger for Recording Level, Flow & Pressure Scroll to: Product Description Specifications Installation Options and Prices Description Global Water's WL300 Water Level Sesor submersible pressure transducer consists of a solid state pressure sensor encapsulated in a stainless steel submersible 3/4" diameter housing. The submersible pressure transducer has a molded-on waterproof cable which connects the sensor to the monitoring device. The transducer has a two-wire 4-20 mA high level output, five full scales ranges, and is fully temperature and barometric pressure compensated. Features The Water Level Sensor provides highly accurate water level measurements for a wide variety of applications in severe environments. The Water Level Sensor has a dynamic temperature compensation system, enabling high accuracy measurements over a wide temperature range. The submersible pressure transducer is easily adapted to all dataloggers, telemetry and monitoring equipment. The transducer is easy to install and operate. The Sensor has a two-wire high level 4-20 mA output. Full scale water level ranges are 0-3', 0-15', 0-30', 0-60', 0-120' and 0-250'. Encapsulated Sensor The WL300 submersible pressure transducer is fully encapsulated with marine grade epoxy. The electonics are encased in epoxy so that moisture can never leak in through the O-ring seals or work its way down the vent tube to cause drift or sensor failure (as is the case with other sensors). The vent tube is sealed directly to the sensing element and any moisture that may come down the vent tube will only come in contact with a silicon sensing device and not electronics. Silicon Diaphragm The WL300 submersible pressure transducer uses a unique silicon diaphragm to interface between the water and the sensing equipment. This silicon diaphragm is highly flexible and is in intimate contact with the sensing element, which produces a sensor with exceptional linearity and very low hysteresis. Other metal foil diaphragms tend to crinkle and stretch out over time causing drift, linearity and hysteresis problems. The design of Global Water's Water Level Sensor eliminates these problems. Low Level Range The pressure transducer is available in a 0-3' full scale range which is ideal for measuring shallow flows or small water level changes. The 0-3' range is great for measuring flows in sewers, storm drains, weirs, flumes, lakes, tanks or any water body that is less than 3' deep. The 0-3' sensor accurately measures small changes in water, even when water is only a few inches deep. Other metal foil type sensors typically have serious problems at low level ranges because of crinkling, stretching and drifting. Protective Cap The Global Water Level Sensor utilizes a stainless steel micro screen cap to protect the sensing element. This protective cap has hundreds of openings, making it virtually impossible to foul the sensor with silt, mud or sludge. Output Signals The WL300 submersible pressure transducer has a two-wire 4-20 mA output signal that is linear with water depth. 10 to 40 VDC is required to run the sensor, so the WL300 transducer can be operated from 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 Pressure Range: 0-3', 0-15', 0-30', 0-60', 0-120',0-250' Linearity and Hysteresis: ±0.1% FS Overall Accuracy: ±0.2% (35°F to 70°F) Overpressure: X4 Burst Pressure: X10 Resolution: Infinitesimal Outputs: 4-20 mA 0.5 to 2.5 VDC across 125 ohms Supply Voltage: 10 to 36 VDC Response Time: 10 MS Size: 3/4" X 8" Materials: Stainless Steel, Epoxy Silicon Cable: Polyethylene jacket, 2-conductor, over shield, vented Installation The submersible pressure transducer may be placed slightly below the lowest expected water level (this is not necessarily the total water depth). Select the lowest possible range to cover the maximum expected water level change. 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. Model & Options WL300 Water Level Sensor Specify Water Level Range: 0-3', 15', 30', 60', 120', 250'. Includes 25' cable...........................$495 (Specify range upon order placement) WLEXC Extra Cable Cable length is measured from end of cable to bottom of sensor. After 25', up to 500'..........................$1.30/ft (Specify total cable length upon order placement) 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 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 6" X 2' stainless steel strap for mounting sensor on pipe bottom......................additional $60 Please select from the menu below
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