Water Level Sensors
WL400 Water Level Sensor
Accurate and reliable Water Level pressure transducer designed for remote monitoring and recording of water level and pressure data in groundwater pumping and sludge tests, stormwater flood analysis, and run-off, as well as surface water irrigation canals, streams, and river gauging.
Global Water’s WL400 Water Level Sensor provides highly accurate water level measurement for various 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.
Multiple depth ranges are available from 3 to 500 feet of water level change.
Key Features:
- Sensor compatible with most monitoring equipment
- Highly accurate water level measurements
- Not affected by foam, wind, or rain
- Wet-wet transducer eliminates vent tube concerns
- Automatic barometric pressure and temperature compensation
- Well-built to support depths of 3ft to 500 ft
- Can measure level and temperature
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 (as is the case with other pressure sensors). The water level 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. 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 also has automatically barometric compensation due to the attached vent cable. It is protected by a stainless steel micro-screen cap, making fouling with silt, mud, or sludge virtually impossible. The water level sensor’s design is great for all saltwater applications, including tide level monitoring, floating docks, etc.
Each submersible pressure transducer has a two-wire 4-20 mA output signal linear with water depth. From 10 to 36 VDC is required to operate the water level sensor so that the level sensors can be operated from common 12 VDC battery systems. The 4-20 mA signal can run up to 3,000 ft 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.
WE100 BAROMETRIC PRESSURE TRANSMITTER
| Output | 4-20 mA |
| Range | 800-1100 mb |
| Accuracy | ±1% of full scale |
| Linearity/Hysteresis | ± 0.1% |
| Operating Voltage | 10-36 VDC |
| Current Draw | Same as sensor output |
| Warm Up Time | 3 seconds minimum |
| Operating Temp | -40° to +131°F (-40° to +55°C) |
| Sensor Size | 3x2x1 inch (7.6×5.1×2.5 cm) |
| Weight | 0.13 lb. (59 g) |
| Sensor Element | Silicone Diaphragm, Wet/Wet Transducer |
| Ranges | 0-3′, 0-15′, 0-30′, 0-60′, 0-120′, 0-250′ |
| Linearity and Hysteresis | ±0.1% FS |
| Accuracy | ±0.1% FS at constant temperature, ±0.2% over 35° to 70°F range |
| Overpressure | Not to exceed 2 x full-scale range Resolution: Infinitesimal (Analog) |
| Outputs | 4-20mA, or 0.5 to 2.5 VDC across 125-ohm resistor |
| Supply Voltage | 10-36VDC |
| Current Draw | Same as sensor output. |
| Warm-Up Time | 10 ms minimum |
| Operating Temperature | -40° to +185°F |
| Weight | 1/2 lb. |
| Compensated Temperature Range | 30 to 70°F submerged, automatic barometric compensation |
| Material | 304L SS |
| Size | up to 5 1/2” long x 13/16″ diameter |
| Weight | ~115g (4 oz) |
| Conductors | 4 each 22 AWG |
| Jacket Material | 87A shore hardness Polyurethane |
| Optional Jacket | Fluorinated Ethylene Propylene (FEP) Teflon |
| Cable O.D. | 7.8mm (0.307”) |
| Vent Tube | HD Polyethylene |
| Shield | Aluminum Mylar |
| Temperature Range | -30 to 85°C (-22 to 185°F) |
| Weight | ~65g/m (0.7 oz/ft) |
WL450 Stainless Steel Water Level Transmitters
The Global Water WL450 all-stainless steel water level transmitters offer standard features and a level of performance that provides outstanding accuracy over temperature.
The WL450 all-stainless level transmitter offers standard features and performance that far exceeds those of other comparably priced transmitters. It features a 316L stainless steel diaphragm, digital temperature compensation, and environmentally neutral Hytrel® cable. These assets enable the unit to provide a high level of performance over a long period of time and a wide range of operating conditions.
Key Features:
- Rugged 316L Stainless steel flush-diaphragm sensor
- Highly accurate water level measurements
- Highly Stable digital temperature compensations
- Steel Housing
- Well-built to support depths of 3ft to 500 ft
- Durable and environmentally neutral Hytrel® cable
- Analog and Digital outputs 4-20 mA and RS-485
The Global Water WL450 All Stainless Steel Water Level Transmitters offer standard features and a level of performance that provides outstanding accuracy over temperature. They are designed and ideally suited to environmental monitoring applications such as test wells, surface water, streams, and reservoirs.
WL450 All Stainless Steel Water Level Transmitters include an RS485 direct-to-digital output for a modem or other communications network. This avoids the error and complication involved with analog-to-digital conversion devices
YSI WL705 Ultrasonic Water Level Sensor
Non-Contact Water Level Measurements
The WL705 Ultrasonic Water Level Sensor uses the latest ultrasonic distance measuring technology for accurate non-contact water level monitoring.
Product Features
- Long range, short dead band
- Unaffected by optical factors like color and transparency
- 4-20 ma Transmitter
- Durable sealed housing for wet or dirty applications
- For monitoring water level in tanks and open channel
The ultrasonic water level sensors contain a rugged transducer in a stainless steel sealed housing for long life and provides an industry standard 4-20 mA output. There are three ultrasonic water level sensor ranges available including 3 ft, 12 ft, and 48 ft to meet a wide variety of applications. The unique 3 ft range ultrasonic water level sensor is ideal for measuring flow in small flumes and weirs. The 12 ft and 48 ft ultrasonic water level sensor ranges are best for measuring river, lake and tank levels and for measuring open channel flow in larger flumes. Ultrasonic water level sensor installation is simple and requires no programming or calibration. No maintenance is required for the ultrasonic water level sensors.
The WL705 Ultrasonic Level Sensors are rugged, reliable and completely weatherproof. The ultrasonic water level sensors are ideal for sewer or wastewater applications. The ultrasonic water level sensors are easy to mount, come with a 6 ft standard cable and complete instructions. The ultrasonic water level sensors are easy to interface to all PLC’s, SCADA and telemetry systems with its simple 3-wire 4-20 mA output. The WL705 Ultrasonic Water Level Sensor is compatible and provided optionally with the Global Water FC220 Open Channel Flow Monitor and the PC320 Process Controller (for water level control).