Stingray 2.0 Portable Level-Velocity Logger
- Measures water level and velocity in partially filled pipes and open channels
- No flume or weir required
- Extreme low power consumption Uses standard Alkaline D-cell batteries
- 130,000 point data logger
- USB output
- Powerful Windows software
- LCD bar graph display
Product Description
- Measures water level and velocity in partially filled pipes and open channels
- No flume or weir required
- Extreme low power consumption Uses standard Alkaline D-cell batteries
- 130,000 point data logger
- USB output
- Powerful Windows software
- LCD bar graph display
Compact and Portable
Stingray 2.0 is a compact, battery-powered logger with an ultrasonic sensor. It data logs level, velocity and water temperature readings for flow monitoring through open channels, partially full sewer pipes and surcharged pipes. Use it for flow surveys, I&I studies, stormwater, irrigation water and sewage.
Hydrodynamic Ultrasonic Sensor
Stingray 2.0 uses a submerged ultrasonic sensor to continuously measure both velocity and level in the channel. The sensor is a completely sealed ultrasonic unit with no orifices or ports. It is hydrodynamically shaped and designed to shed deposits and stringers for reliable operation in sewage, stormwater and stream flow applications. The QZ02L sensor mounts inside the pipe or at the bottom of an open channel. No special compounds, tools or hardware are required. A stainless steel mounting bracket is included.
Powered by Standard Alkaline Batteries
With 4 standard Alkaline D-cell batteries the Stingray 2.0 will operate up to 4 years! These inexpensive Alkaline batteries are available in stores everywhere and with an extremely low self discharge rate they will reliably power the energy-efficient Stingray 2.0 for the duration of your flow study.
Stingray 2.0 stores 130,000 data points including level, velocity and water temperature. Between readings it powers down to conserve energy.
Stingray 2.0 Confidence Display
You can check operation with the built-in LCD bar graph display. It scrolls through level, velocity and temperature readings, plus remaining battery and logger storage capacity. The display turns off automatically after 60 seconds to conserve battery power.
- Flow Surveys
- Inflow & Infiltration Studies
- CSO Monitoring
- Stormwater Runoff
- Irrigation Water
- Permit Compliance
- Wastewater Treatment Plant Flow Studies
LEVEL-VELOCITY LOGGER SPECIFICATIONS
SCOPE: This specification covers a portable Level-Velocity Logger as manufactured by Greyline Instruments, Massena, New York / Long Sault, Ontario. The instrument shall provide for measurement and data logging of level, velocity and temperature readings from flow in open channels and partially filled or surcharged pipes.
A. GENERAL
- Level-Velocity Logger to consist of a submersible ultrasonic sensor, connecting cable, and a remote enclosure with electronics and display. System shall have no moving parts.
- Level measurement accuracy shall be ±0.25% of Level. Velocity measurement accuracy shall be ±2% of reading.
B. SENSING ELEMENT
- Ultrasonic sensor shall be rated IP68 for continuous submersion in liquids.
- Using the ultrasonic Doppler principle, the sensor shall measure fluid velocities from 0.1 to 12.5 ft/sec (0.03 to 3.8 m/sec).
- Using ultrasonic echo-ranging principle, the submerged sensor shall measure liquid level from 1" to 15 ft. (25.4 mm to 4.57 m) above the bottom of the pipe or channel. Minimum detectable level shall not be greater than 1" (25.4 mm). Level sensing circuitry shall include a temperature sensor for automatic temperature compensation.
- Sensor shall be constructed of PVC, stainless steel, polyurethane and epoxy.
- Sensor operating temperature shall be from 5°F to 150°F (-15°C to 65°C).
C. SENSOR CONNECTING CABLE
- Provide minimum length 25 ft (7.6 m) tri-coaxial cable with potted bond to the Sensor head. Sensor cable shall be waterproof and electrically shielded. Exposed material shall be polyurethane only.
- Sensor shall include a watertight plug for connection to the instrument electronics.
D. LOGGER ELECTRONICS
- No calibration shall be required. The Level-Velocity Logger shall measure liquid level from the bottom of the pipe or channel, and flow velocity.
- Logger electronics operating temperature shall be from –5° to 140°F (–20° to 60°C).
- Shall have USB output to transfer log files to a Windows™ computer or laptop.
- Provide an LCD bar graph display to indicate level, velocity and temperature readings, plus remaining battery and logger storage capacity.
- Shall be housed in a watertight IP67 enclosure with hinged, latching cover and watertight sensor cable entry.
- Logger capacity shall be 130,000 data points. Each data point includes level, velocity and temperature reading.
- Logger sample rate shall be user-selectable from 10 or 30 seconds, 1, 2, 5, 10, 30 or 60 minutes.
- Shall be powered by 4 D-cell Alkaline batteries. Battery life shall be matched to Logger storage capacity: 15 days at 10 second sample rate up to 4 years at 60 minute sample rate.
E. PC SOFTWARE
- Shall include Windows™ software to retrieve, display, save and export log files from the Level-Velocity Logger. Shall support Windows versions including XP, Vista, 7 and 8.
- Shall convert level-velocity readings to flow for channel shapes including round pipes, rectangular, trapezoid and egg-shaped channels. Shall convert level readings to flow for flumes and weirs.
- Shall provide 'real-time' communication with the level-velocity logger to display readings with a refresh rate of 10 seconds or less.
- Shall permit the operator to set logging rate of the level-velocity instrument from 10 or 30 seconds, 1, 2, 5, 10, 15, 30 or 60 minutes.
- Shall display battery life remaining and logger capacity remaining.
- Shall display, save, output to a printer and export level-velocity log files in graph and tabular format. Export log files shall be delimited for import to spreadsheet or database programs.
- Shall permit conversion of linear and volume units.
F. OPTIONAL FEATURES FOR INSERTION AS REQUIRED
- Shall include 50 ft / 15 m length sensor cable extension with watertight connector plugs to permit sensor installation total distance of 75 ft / 23 m from the electronics enclosure. Cable extension shall be shielded, submersible with a durable polyurethane coating.
Area-Velocity Flow
Measure open channel flow without a flume or weir
An Area-Velocity Flow Meter continuously measures both Level and Velocity to calculate flow volume in an open channel or pipe.
The ultrasonic sensor is installed at the bottom of a pipe or channel. To measure water level the sensor transmits ultrasonic pulses that travel through the water and reflect off the liquid surface. The instrument precisely measures the time it takes for echoes to return to the sensor. Based on the speed of sound in water, the level is measured with accuracy of ±0.25%.
Flow velocity is measured with an ultrasonic Doppler signal continuously injected into the water. This high frequency sound (640 KHz) is reflected back to the sensor from particles or bubbles suspended in the liquid. If the fluid is in motion, the echoes return at an altered frequency proportionate to flow velocity. With this technique the instrument measures flow velocity with accuracy of ±2%.
Greyline Area-Velocity Flow Meters work in partially full and surcharged pipes, rectangular, trapezoid and egg-shaped channels.
Optional - Separate Level and Velocity Sensors
A separate down-looking ultrasonic sensor can be used for highly aerated or turbulent flow applications. It measures level by transmitting ultrasonic pulses through the air to the liquid surface with accuracy of ±0.25%. Along with the level sensor, a submerged Doppler velocity sensor is used to measure the water velocity.