Water Level and Velocity Measurements
HOBO Water Level Data Logger - U20L-04 • U20L-01 • U20L-02
A low-cost, research-grade data logger for continuous monitoring of water level and temperature at depths of up to 13, 30, or 100 feet in a wide range of underwater environments. This logger features 0.1% measurement accuracy, a polypropylene housing for use in both freshwater and saltwater, and a non-vented design for convenient and hassle-free deployment.
Features
- Self-contained, non-vented design enables easy deployment
- Ideal for use in both freshwater and saltwater environments, including wells, streams, lakes, wetlands, and tidal areas
- Depths up to 13, 30, or 100 feet depending on model
- Durable ceramic pressure sensor withstands freezing
- HOBOware Pro software provides easy conversion to accurate water level reading, fully compensated for barometric pressure, temperature, and water density
HOBO Water Level Data Logger
The industry’s first water level data logger designed for convenient wireless setup and download via Bluetooth technology. Dramatically simplifies and lowers the cost of field data collection by providing wireless access to high-accuracy water level and temperature data right from a mobile phone, tablet, or Windows computer running Onset’s free HOBOconnect app. Consists of a top-end unit and a water level sensor which are sold as a set. A direct-read cable is required to connect them. Cables can be ordered in lengths from 0.2 to 500m for deployment in a wide range of wells.
Features
- Wireless data offload to mobile devices or Windows computers via Bluetooth
- Integrated barometric pressure sensor enables direct water level readout
- Direct-read cable connects sensor to top-end logger/transmitter
- The cable includes Kevlar strength member
- Cables are interchangeable so loggers are easy to redeploy in future applications
- The logger and sensor add 0.39 meters to the length of the cable
- Cable length can vary up to 3% from the length ordered
- The 1, 2, 5, 10, 15, 30 and 60 meter cable lengths are in stock; custom cable lengths have a 1 to 2 week lead time
- Reference water level can be entered at the start of the deployment
- Use HOBOconnect for setup, data viewing, and data sharing
- Powered by two user-replaceable AA batteries in the top-end unit
- Several logging modes: normal, multi-rate logging, and event-triggered burst-logging
- Durable ceramic sensor
- Available with stainless steel or titanium sensor ends
- 3-point NIST-traceable calibration certificate included for the water pressure sensor
MicroRX Water Level Station - RX2100-WL
Enabled with cellular communication, this award-winning remote water level monitoring station completes calculations onsite and sends notifications of critical conditions via cellular plans to the cloud. Ideal for stormwater, floodwater, irrigation, hydrologic, and environmental applications, this remote monitoring solution comes with pre-programmed water flow formulas for select weirs, flumes, and a stage discharge table that allow easy and intuitive configuration.
This compact and durable station, together with the non-vented water level sensor, provides reliable monitoring, even when deployed in harsh conditions. Water flow and accumulated rainfall calculations, which are performed directly on the station at time of measurement, trigger immediate notifications of critical water level conditions.
The optional integrated solar panel or battery power, with a wide range of plug-and-play smart sensors, supports flexible environmental monitoring.
Features
- Station-side alarms for water flow and accumulated rainfall triggered at time of measurement
- Non-vented ceramic water level sensor with a choice of four ranges
- Interchangeable, Kevlar-reinforced water level sensor cables
- Integrated barometric pressure sensor
- Compact IP66/NEMA 4X enclosure
- Built-in LCD confirms proper setup and operation
- Two power options:
- Integrated 1.7 W solar panel with rechargeable battery pack
- 5 W and 15 W external solar panels can be added (RX2104 only)
- User-replaceable AA lithium batteries
- Integrated 1.7 W solar panel with rechargeable battery pack
- Inputs for five plug-and-play sensors
- Up to 10-minute connections rates via 4G cellular data plans
- Cloud-based monitoring and data access through HOBOlink
- Available with stainless-steel or titanium sensor ends
- 3-point NIST-traceable calibration certificate included for the water pressure sensor
HOBO Water Level Data Logger Deluxe Kit (30’) - KIT-D-U20-01
Combining high accuracy water level measurements with out-of-the-box convenience, this money-saving kit includes everything needed to start logging right away. Ideal for monitoring water levels and temperatures in wells, streams, lakes and freshwater wetlands, as well as barometric pressure.
This kit includes:
- U20-001-01HOBO data logger (30′ range)
- U20-001-04HOBO data logger (13′ range) for barometric pressure
- U-DTW-1HOBO waterproof shuttle with 5 interchangeable couplers
- U20-CASE-1carrying case
- HOBOware Pro software
Like other HOBO Water Level Loggers, the 30-foot version offers exceptional value and ease-of-use, with no cumbersome vent tubes or desiccants to maintain.
Features
- Lightning protection; no long signal wires, and electronics are shielded in stainless-steel housing
- HOBOware Pro software provides easy conversion to accurate water level reading, fully compensated for barometric pressure, temperature, and water density
- Multiple-rate sampling allows faster sampling at critical times such as when pumping starts or stops
- Available in four depth ranges
- Ideal for use in wells, streams, lakes, wetlands, and tidal areas
- No-vent-tube design for easy reliable deployment
- Durable ceramic pressure sensor
Radar Level Sensor - OTT RLS
The OTT RLS is a non-contact radar level sensor with pulse radar technology. The OTT RLS offers a large measurement range with a small blanking distance and narrow beam width and it easily connects to most dataloggers. The RLS has extremely low power consumption and is ideal for remote or solar powered sites.
- No drift over time
- High Performance–Measurements are unaffected by air temperature, humidity, flood events, floating debris, or contaminated water; reduces the likelihood of missing data and reduces data post processing
- Low Maintenance–Flat antenna design eliminates nesting areas for insects and periodic maintenance requirement
- Flexible Integration/Easy Setup–Connects to most data loggers via standard communication interfaces, SDI-12 or 4 … 20 mA; no need for additional PC software
- Simple Installation–Light weight compact design facilitates easy mounting on bridges, extension mounting bracket or inside a small protective housing
- Low Profile Design–Unobtrusive appearance is ideal for urban installation sites or sites prone to vandalism
- Low Power Consumption–Ideal for remote or solar powered sites; requires only 12 mA when active
For surface water level measurement of:
- Streams and rivers
- Tidal zones
- Reservoirs and lakes
Ideal for monitoring:- Surface waters prone to flooding
- Sediment or debris laden streams and rivers
- Migrating channels
Surface Velocity Radar for Measuring Open Channel Flow - OTT SVR 100
OTT SVR 100 is a simple, non-contact, compact surface water velocity radar sensor. Designed for measuring flow in open channels and rivers where reliable velocity data is required continuously, during floods or periods of high concentrations of suspended sediments.
The sensor is mounted above the water surface, away from floating debris using a flexible bracket for vertical or horizontal installation. Velocity measurements and sensor status information from the integrated vibration and tilt sensor is available via SDI-12 over RS-485 and Modbus. It is also compatible with OTT Prodis 2 software for system calibration.
Velocity Measurements:
- Continuous non-contact surface velocity measurements during low, normal or high flows
- Identify data influenced by sensor movement (e.g., wind, traffic) using meta data from integrated vibration and tilt sensors
- Automatically detect flow direction
- Eliminate/reduce effects of wind, precipitation, vibration, or waves by setting site specific filters
Installation / Maintenance:
- Sensor unaffected by floating debris or suspended sediment by installing above the water surface
- Flexible sensor mounting for quick installation on horizontal or vertical structures
- Easily conceal sensor with compact size and flexible mounting options
- Virtually maintenance free
System Integration / Compatibility:- Simple system integration, no deep knowledge required
- Low power, ideal for powering with solar power
- Easily integrate with new or existing systems using SDI-12 or RS-485 interface
- Compatible with OTT Prodis 2 for system calibration
Universal Current Meter for discharge measurements - OTT C31
The OTT C31 Universal Current Meter is designed for flow velocity measurements in combination with hand-held wading rods or cable suspended from a bridge or boat. Different accessories like sounding weights (middle pieces), sounding reels (winches), cable ways etc. allow the setup of a complete flow monitoring station. OTT C31 Universal current meters mean thousandfold proven quality, precision and reliability – worldwide for decades.
- The robust construction and high-quality materials allow operation even under difficult conditions with high accuracy
- Low starting speed
- Reinforced meter spindle
- Cost reduction owing to low maintenance requirements and simple, inexpensive handling
- Worldwide proven
- Universal application for river flow measurements as rod-mounted current meter or as suspended version
- Use with single-drum winch in combination with a bridge jib/measurement trolley or with double-drum winch cable-way installation.
- Calibration and cyclical control of flow velocity and discharge measuring equipments.
