
Manufacturer: YSI
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Accurate measurements, rugged design, and easy data management make the Level Scout ideal for groundwater monitoring, long-term surface water studies, resource management, aquifer/pump tests, soil vapor extraction, wastewater intake monitoring and leachate monitoring.
The Level Scout is a vented, titanium transducer with 4 mb memory. The field cable features new, in-line vent filter that easily fits in a 1-inch well and does not require any maintenance since there is no desiccant to replace. Instead of using a replaceable desiccant, the filter vents the transducer to the atmosphere to compensate for changes in barometric pressure through a waterproof patch. All vent tubes are internal to the vent filter so there is no need to worry about crimping the tube and affecting the readings. The cables are available with either a polyurethane jacket or a more chemically-resistant ETFE jacket.
Key Features
- User-replaceable batteries prevent costly down time and reduces long-term costs
- User-selectable reading rates allow you to get up to 15 readings per second!
- Built in sampling modes include linear, linear average, event triggered, and logarithmic
- Accuracy is +/-0.05% of FS
- Broadcast data via SDI-12, RS232, or RS485 to a data collection platform
- Zero maintenance field cable
- 400,000 data points
Approximate Weights
- Transducer with batteries: 0.70 lbs (318g)
- Cable assembly (less cable): 0.15 lbs (57g)
- Cable: 0.05 lbs/ft (79 g/m)
- Suspension wire: 0.005 lbs/ft (8 g/m)
Batteries, Internal
- 2 each 1.5 V AA alkaline recommended
Battery Life
- 3 years, 15-minute sampling intervals w/alkalines
Communication Interface
- RS-485; 3 volt p-p differential w/selectable baud rates from 1200 to 19200
Communication Protocol
- SDI-12 ver 1.3 compliant
Dimensions
- Diameter: 0.75" (19.0 mm)
- Length: 12.44" (316.00 mm)
External Excitation
- 6 to 16 VDC
External Input Current
- Avg current during measurement: 8.0 mA
- 15 mS peak current during page writes: 25.0 mA
- Quiescent 0.25 mA
Protection Rating
- IP-68, NEMA 6P, RoHS, On-board surge protection
Temperature
- Compensated: 14 to 104° F (-10 to 40° C)
- Operating: -4 to 122° F (-20 to 50° C)
- Storage without batteries: -40 to 176° F (-40 to 80° C)
- Storage with batteries: -4 to 122° F (-20 to 50° C)
Temperature Coefficient
- 0.001 to 0.01%/° C
Full Scale Level Range*
- 10, 50, 75, 250, 692 ft. H2O (3, 15, 23, 76, 211 m H2O) for vented gauge reference
- 10, 50, 70, 230, 692 ft. H2O (3, 15, 21, 70, 211 m H2O) for absolute reference
Barometric Pressure Range
- 8 to 16 psia (55 to 110 kPa) for barometer
Proof Pressure
- 2.0 x FS
Burst Pressure
- 3.0 x FS
Sensor Response Time
- <1 millisecond
Display Time Resolution
- 1 second
Measurement Resolution
- 24 bit AD converter
Level
- ±0.05 %FS TEB1,2 for level ranges >10 ft. (3 m) H2O
- ±0.10 %FS TEB1,2 for level ranges <= 10 ft. (3 m) H2O
Temperature
- ±1.0° C Models VS2, VT2, AS2, AT2
- ±0.2° C Models VS4, VT4, AS4, AT4
Data Upload Time
- 100 scans/sec pressure and temp with time stamp per second @ 19200 baud rate
Maximum Pressure Scans
- 393,120 with time stamp
Maximum Pressure and Temperature Scans
- 288,288 with time stamp
Modes of Sampling (Software Selectable)
- Linear
- Linear Avg
- Event
- Logarithmic
Pressure Units
- psi, ft. H2O, mm H2O, cm H2O, m H2O, kPa (user-specified or by slope and offset)
Sampling Rate 3
- Programmable 8 readings per second max
Time Stamp Accuracy
- ±2 min/year over compensated temp range
2. Additional error up to <0.1% FS/year may be incurred due to offset drift
3. For sampling rates greater than 3 Hz, the pressure/temperature averaging must be reduced as required
* Special measurement range available upon request