What is a Water Level Datalogger?
A water level datalogger is an instrument that automatically and continuously records fluctuations in water level. Water level data logs are stored in the datalogger's memory and can be downloaded using software, or can be collected by other means such as a smart device app, telemetry, or data acquisition system.
Many water level dataloggers use a pressure sensor to measure water pressure above the water level datalogger zero measurement point. Water pressure readings can then be converted to water level equivalent measurements. Solinst offers both absolute and vented (gauged) pressure sensor water level dataloggers. An absolute water level datalogger measures both water and atmospheric pressure; therefore water level data needs to be barometrically compensated. A vented water level datalogger is vented to the atmosphere and only measures water pressure.
Typically, water level dataloggers are programmed, stopped, started and set to record at a specific interval using a software program. Solinst water level dataloggers can be set to record water levels as often as 1/8 of a second. A water level datalogger is an alternative to using a water level meter, which requires personnel to manually measure and record water levels. As such, water level dataloggers are ideal for long-term, uninterrupted water level monitoring and for short-term hydrogeological studies that require a high frequency of water level recordings.
Solinst water level dataloggers also record water temperature; in addition, the Levelogger 5 LTC records conductivity. Solinst water level dataloggers are compact instruments and combine the pressure sensor, temperature sensor, conductivity sensor, memory, and long-lasting battery in one durable housing.
All-in-one water level dataloggers make deployment easy. Solinst provides the option of deploying via simple wireline/rope or using direct read cables to allow communication while the datalogger is installed and logging (vented water level loggers are deployed using vented communication cables). Water level dataloggers can be used to measure groundwater levels, as well as surface water levels in rivers, streams, lakes, oceans, etc.
Levelogger 5 Datasheet
- Aquifer characterization: pumping tests, slug tests, etc.
- Watershed, drainage basin and recharge monitoring
- Stream gauging, lake and reservoir management
- Harbour and tidal fluctuation measurement
- Wetlands and stormwater run-off monitoring
- Water supply and tank level measurement
- Mine water and landfill leachate management
- Long-term water level monitoring in wells, surface water bodies and seawater environments
Leveloggers can be programmed with linear, event-based, or a user-selectable sampling schedule. Linear sampling can be set from 1/8 second to 99 hours.
Event-based sampling can be set to record when the level changes by a selected threshold. Readings are checked at the selected time interval, but only recorded in memory if the condition has been met. A default reading is taken every 24 hours if no “event” occurs.
The Schedule option allows up to 30 schedule items, each with its own sampling rate and duration. For convenience, there is an option to automatically repeat the schedule.
Standard Cable Deployment
Leveloggers may be suspended on a stainless steel wireline or Kevlar® cord. This is a very inexpensive method of deployment, and if in a well, allows the Levelogger to be easily locked out of sight and inaccessible. Solinst offers stainless steel wireline assemblies and Kevlar cord assemblies in a variety of lengths.
L5 Direct Read Cables
When it is desired to get realtime data and communicate with Leveloggers without removal from the water, they can be deployed using L5 Direct Read Cables. This allows viewing of data, downloading, and programming in the field using a portable PC, or Solinst Levelogger 5 App Interface. You can view and save data to an SRU, or just download data with a DataGrabber 5.
Leveloggers can be connected to an SDI-12 datalogger using the Solinst SDI-12 Interface Cable attached to a L5 Direct Read Cable.
Direct Read Cable Specifications
L5 Direct Read Cables are available for attachment to any Levelogger in lengths up to 1500 ft. The 3.175 mm dia. (1/8") coaxial cable has an outer polyurethane jacket for strength and durability. The stranded stainless steel conductor gives non-stretch accuracy.
Accurate Barometric Compensation
Leveloggers measure absolute pressure (water pressure + atmospheric pressure) expressed in feet, meters, centimeters, psi, kPa, or bar.
The most accurate method of obtaining changes in water level is to compensate for atmospheric pressure fluctuations using a Barologger 5, avoiding time lag in the compensation. The Barologger 5 is set above high water level in one location on site. One Barologger can be used to compensate all Leveloggers in a 30 km (20 mile) radius and/or with every 300 m (1000 ft.) change in elevation.
The Levelogger Software Data Compensation Wizard automatically produces compensated data files using the synchronized data files from the Barologger and Leveloggers on site.
The Barologger 5 uses pressure algorithms based on air rather than water pressure, giving superior accuracy. The recorded barometric information can also be very useful to help determine barometric lag and/or barometric efficiency of the monitored aquifer.
The Barologger 5 records atmospheric pressure in psi, kPa, or mbar. When compensating submerged Levelogger 5, Edge, Gold or Junior data, Levelogger Software can recognize the type of Levelogger and compensate using the same units found in the submerged data file (e.g. feet or meters). This makes the Barologger 5 backwards compatible.
The 2" Locking Well Caps are designed for both standard and Direct Read Cable deployment options.
The well cap has a convenient eyelet for suspending Leveloggers using wireline or Kevlar cord. The Well Cap insert has two openings to accommodate Direct Read Cables for both a Levelogger and Barologger. Adaptors are available to fit 4" wells.
The cap is vented to equalize atmospheric pressure in the well. It slips over the casing, and the cap can be secured using a lock with a 3/8" (9.5 mm) shackle diameter.
DataGrabber 5
The DataGrabber 5 is a field-ready data transfer device that allows you to copy data from a Levelogger onto a USB flash key (Dual USB & USB-C key provided).The DataGrabber 5 is compact and very easy to transport. It connects to the top end of a Levelogger's Direct Read Cable, or directly to a Levelogger using an adaptor. One push-button is used to download all of the data in a Levelogger's memory to a USB device.
Solinst Readout Unit (SRU)
Connect an SRU to an in-field Levelogger via an L5 Direct Read Cable or L5 Threaded or Slip Fit Adaptor to display instant water level readings, Levelogger status, save a real-time logging session, and download data to the SRU memory.
LevelSender 5 Telemetry
The LevelSender 5 is a simple, low cost telemetry system designed to send data from Leveloggers in the field, to your smart device and PC database via cellular communication. There is two-way communication between the LevelSender 5 and Home Station, allowing remote updates. LevelSender 5 stations are compact in design, which allows them to be discreetly installed inside a 2" (50 mm) well
SolSat 5 Satellite Telemetry
The SolSat 5 Satellite Telemetry uses Iridium satellite technology to provide global connectivity for your remote water monitoring projects. The SolSat 5 is simple to set up with Solinst dataloggers using an intuitive and secure Wi-Fi App on your smart device. The SolSat 5 features a built-in barometer, solar panel and a compact weatherproof enclosure for deployment almost anywhere.
STS Telemetry
STS Telemetry provides an efficient method to send Levelogger data from the field to your desktop. Cellular communication options give the flexibility to suit any project. STS Systems are designed to save costs by enabling the selfmanagement of data. Alarm notification, remote firmware upgrades and diagnostic reporting make system maintenance simple
RRL Remote Radio Link
The RRL Remote Radio Link is ideal for closed-loop, short range applications up to 30 km (20 miles). The RRL can be linked to an STS telemetry station to change from a closed-loop telemetry system to one which can be accessed from anywhere through internet connectivity.
Specifications
Levelogger 5 Water Level Datalogger
Level Sensor
| Level Sensor: | Piezoresistive Silicon with Hastelloy Sensor |
|---|---|
| Accuracy: | ± 0.05% FS (Barologger 5: ± 0.05 kPa) |
| Stability of Readings: | Superior, low noise |
| Resolution: | 0.002% FS to 0.0006% FS |
| Units of Measure: | m, cm, ft., psi, kPa, bar, ºC. ºF (Barologger 5: psi, kPa, mbar, ºC, ºF) |
| Normalization: | Automatic Temperature Compensation |
| Temp. Comp. Range: | 0º to 50ºC (Barologger 5: -10 to +50ºC) |
Temperature Sensor
| Temperature Sensor: | Platinum Resistance Temperature Detector (RTD) |
|---|---|
| Temp. Sensor Accuracy: | ± 0.05ºC |
| Temp. Sensor Resolution: | 0.003°C |
| Battery Life: | 10 Years - based on 1 reading/minute |
| Clock Accuracy: | ± 1 minute/year (-20ºC to 80ºC) |
| Operating Temperature: | -20ºC to 80ºC |
| Maximum # Readings: | 150,000 sets of readings |
| Memory Mode: | Slate and Continuous |
| Communication: | Optical high-speed: USB, SDI-12 57,600 bps with USB |
| Size: | 22 mm x 160 mm (7/8" x 6.3") |
| Weight: | 146 grams (5.2 oz) |
| Corrosion Resistance: | Baked-on coating using polymerization technology (inside and out) |
| Other Wetted Materials: | Delrin®, Viton®, 316L stainless steel, Hastelloy, PFAS-free PTFE coating |
| Sampling Modes: | Linear, Event & User-Selectable with Repeat Mode, Future Start, Future Stop, Real-Time View |
| Measurement Rates: | 1/8 sec to 99 hrs |
| Barometric Compensation: | Software Wizard and one Barologger 5 in local area (approx. 30 km/20 miles radius) |
| Models | Full Scale (FS) | Accuracy | Resolution |
|---|---|---|---|
| Barologger | Air only | ± 0.05 kPa | 0.002% FS |
| M5 | 5 m (16.4 ft.) | ± 0.3 cm (0.010 ft.) | 0.001% FS |
| M10 | 10 m (32.8 ft.) | ± 0.5 cm (0.016 ft.) | 0.0006% FS |
| M20 | 20 m (65.6 ft.) | ± 1 cm (0.032 ft.) | 0.0006% FS |
| M30 | 30 m (98.4 ft.) | ± 1.5 cm (0.064 ft.) | 0.0006% FS |
| M100 | 100 m (328.1 ft.) | ± 5 cm (0.164 ft.) | 0.0006% FS |
| M200 | 200 m (656.2 ft.) | ± 10 cm (0.328 ft.) | 0.0006% FS |
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