Water Level Sensors
Our range of water level and depth level gauges have been selected to complement the Hydro-Logic™ Level Logger for many different surface and groundwater applications. We have selected instruments from manufacturers with an international reputation for quality of both the measurement technology and after-sales support services.
Not all sensor types are suitable for all level measurement applications; some, such as Pulsar and Vega, are best suitable for non-contact applications offering benefits of low maintenance in challenging environmental or installation conditions, whereas ther sensing methods such as our highly accurate float-weight-driven, shaft-encoders manufactured in Scotland by Thistle Design are suitable for larger diameter stilling-wells in large rivers and reservoirs.
For smaller diameter stilling-pipes and borehole tubes, we strongly recommend the depth pressure sensors manufactured in the UK by Impress Sensors including SDI-12 versions that also enable temperature measurement.
Products
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Level Troll 300
- Depth, level, pressure and temperature logger
- Connects to Frog RX and tapole GPRS logger
- Sensor accuracy of ±0.2% full scale
- 18.3mm diameter stainless steel housing
- Non-vented (absolute) depth sensor
- 4-20mA, SDI-12, RS485 outputs
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AquaRead LeveLine
- Low cost depth level logger
- Absolute, gauge (vented) or barometric pressure models
- Sealed 22mm diameter titanium probe
- Internal 3.6V lithium battery, up to 10 years life
- SDI-12 - Modbus link to Isodaq GPRS loggers
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LMK306 Submersible Level Transmitter
- Ceramic pressure sensor
- Suitable for boreholes, reservoirs and rivers
- Use with Isodaq Frog R2/R3 or Hawk XT/RT loggers
- 4-20mA / 2-wire and powered from 12 to 36V dc
- Level ranges from 6mWG up to 200mWG
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Level Troll 400
- Deploy in sub-1 inch wells and other narrow enclosures
- Integrate with telemetry systems,SCADA/PLC systems, and third-party data loggers and samplers
- Non-vented (absolute)
- 1.83-cm (0.72-in.) diameter titanium housing that is suitable for harsh environments
- Includes built-in Modbus/RS485, SDI-12, and 4-20 mA
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Rugged BaroTroll Data Logger
- Can be connected to a telemetry system, SCADA/PLC system, controllers, or third-party data collection platform
- 2.62-cm (1.03-in) diameter titanium housing is suitable for harsh environments
- Modbus/RS485 or SDI-12 communication options
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VRS-20 SDI-12 radar level sensor
- Non-contact sensor - no stilling-pipe needed
- Suitable for deployment from bridges or towers
- Use with any Isodaq logger via SDI-12
- Accuracy - +/-10mm
- Unaffected by temperature or radiation
- Averaging facility for turbulent waters
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WL61 Radar Level Sensor
- Non-contact sensor - no stilling-pipe needed
- Suitable for rivers/reservoirs via bridge/tower deployment
- Use with Isodaq Frog R2/R3 or Hawk XT loggers
- Accuracy - +/-2mm
- Unaffected by temperature changes
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24R-105 Optical Shaft Encoder
- Float/weight wire operated system
- Suitable for rivers/reservoirs via bridge/tower deployment
- Use with Isodaq Hawk XT loggers
- Accuracy - <+/-2mm
- Float diameter options - 75mm - 150mm
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IMP Ultrasonic Level Sensor
- ATEX non contact ultrasonic air-ranging sensor
- Suitable for culverts, sewers and tanks
- Use with ISODAQ Telemetry loggers
- Accuracy is ± 0.25% or 6mm (whichever is greater)
- ATEX zone 1 certification as standard
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SDI-12L Submersible Level Transmitter
- Level and Temperature output as standard
- Stainless steel or Marine Bronze options
- Suitable for tank, borehole, reservoir, river, sea, estuary
- Use with Isodaq Frog R2/R3 or Hawk XT series loggers
- Accuracy - <+/- 0.1% BFSL
- Probe diameter - 25mm
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LMP307 Depth Pressure Sensor
- Low cost submersible depth sensor
- Suitable for boreholes, reservoirs and rivers
- Use with Isodaq Frog R2/R3 or Hawk XT/RT loggers
- Accuracy - <+/- 0.05% BFSL
- Probe diameter - 25mm
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4-20mA Submersible Level Transmitter
- Low cost submersible depth sensor
- Suitable for boreholes, reservoirs and rivers
- Use with Isodaq Frog R2/R3 or Hawk XT/RT loggers
- Accuracy - <+/- 0.05% BFSL
- Probe diameter - 25mm
- 4-20mA
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Rugged Troll 100, 200
- Designed for groundwater and surface-water monitoring
- Titanium construction for harsh conditions
- Modbus, RS485 or SDI12
- Linear, fast linear and event logging modes available
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Level Troll 700
- Integrated Modbus/RS485, SDI-12, and 4-20 mA communication protocols
- Connects to Frog RX unit for use as low-cost GSM/GPRS telemetry outstation
- Sensor accuracy of ±0.1% full scale
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Level Troll 500
- Integrated Modbus/RS485, SDI-12, and 4-20 mA communication protocols
- Connects to Frog RX unit for use as low-cost GSM/GPRS telemetry outstation
- Narrow diameter body (18.3 mm OD)
- Sensor accuracy of ±0.1% full scale
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DBi Ultrasonic Level Sensor
- Non contact Ultrasonic air-ranging sensor
- Suitable for culverts, sewers and tanks
- Use with ISODAQ Telemetry loggers
- Accuracy is ± 0.25% or 6mm (whichever is greater)
- ATEX zone 1 certification as standard
