DIVER Datalogers by Van Essen
Dedicated to water level monitoring solutions
In the early 1990s, Van Essen began to offer standard water related equipment such as standalone dataloggers, which used external sensors and flow meters for open channels. Van Essen was one of the first companies to develop a tide measuring system for the Rotterdam Harbor. In this project telemetry was used. Telemetry was very advanced for its time and became a key milestone in Van Essen’s growth.
Since the deployment of the first Diver, Van Essen Instruments have sold over 200,000 dataloggers worldwide. Our commitment to quality and performance has established Van Essen Instruments as one of the premier brands in the industry.
TD-Diver
The TD-Diver is a submersible datalogger for long-term uninterrupted, real-time water level monitoring using a pressure sensor when submerged at a fixed level under the water surface. The pressure sensor measures the equivalent hydrostatic pressure of the water above the sensor diaphragm to calculate the total water depth. The Diver autonomously measures pressure and temperature and records them in its internal memory. The Diver is ideal for ground and surface water level applications.
This Diver features a stainless steel (316 L) casing with a 22 mm diameter. The TD-Diver can store a maximum of 72,000 measurements (date/time, pressure, and temperature) in its working memory and 72,000 measurements in its backup memory.
The TD-Diver samples pressure and temperature at fixed length intervals and stores these values in fixed length or continuous memory.
The TD-Diver is available in the following pressure ranges 10 m, 20 m, 50 m, and 100 m.
The TD-Diver features:
- Designed for up to 10 years of use.
- Solid enclosure to make borehole deployments easier.
- Spend less time in the field with fast download speeds
- Large memory enables users to take a sample every 15 minutes for 2 years.
- Enhanced data integrity with the new backup memory feature.
- Compatible with all of your existing Diver accessories.
Baro-Diver
The Baro-Diver® is a datalogger for long-term uninterrupted, real-time atmospheric pressure monitoring. In addition, the Baro-Diver can monitor shallow water levels using a pressure sensor when submerged at a fixed level under the water surface. The pressure sensor measures the equivalent hydrostatic pressure of the water above the sensor diaphragm to calculate the total water depth. The Diver autonomously measures pressure and temperature and records them in its internal memory.
This Diver features a stainless steel (316L) casing with a 22 mm diameter. The Baro-Diver can store a maximum of 72,000 measurements (date/time, pressure and temperature) in its working memory and 72,000 measurements in its backup memory.
The Baro-Diver samples pressure and temperature at fixed length intervals and stores these values in fixed length or continuous memory.
The Baro-Diver features:
- Designed for up to 10 years of use.
- Fast download speed so you spend less time in the field.
- Large memory lets you take a sample every hour for 8 years.
- Enhanced data integrity with the new backup memory feature.
- Compatible with all of your existing Diver accessories.
Cera-Diver
Monitoring groundwater under potentially corrosive conditions, such as brackish water and seawater, requires a robust and durable datalogger.
The ceramic-shelled Cera-Diver is designed specifically for such environments. This highly reliable and compact Diver measures groundwater levels with a typical accuracy of ±0.05% full scale.
In addition to its rugged casing, the Cera-Diver’s memory capacity can store up to 48,000 measurements (date/time, pressure and temperature) – almost one measurement every ten minutes for an entire year.
The Cera-Diver has the following sample methods: fixed length intervals, event dependent, averaging and pumping test.
The Cera-Diver is available in the following pressure ranges: 10 m, 20 m, 50 m and 100 m.
The Cera-Diver features:
- Innovative ceramic housing technology
- Compact size: Ø 22 mm – length 90 mm
- Various measurement methods
- 48,000 records of time stamp, pressure and temperature
- 30-Point Pressure Factory Calibration
CTD-Diver
Where there is a need to monitor groundwater levels and saltwater intrusion, injected wastewater, or contamination from chemical discharges and landfill sites, the CTD-Diver® with its 22 mm diameter rugged, corrosion-proof ceramic (zirconium-oxide) housing, is the instrument of choice. It autonomously measures conductivity, pressure, and temperature and records them in its internal memory. The CTD-Diver is ideal for ground and surface water level applications.
The CTD-Diver is a submersible datalogger for long-term uninterrupted, real-time water level monitoring using a pressure sensor when submerged at a fixed level under the water surface. The pressure sensor measures the equivalent hydrostatic pressure of the water above the sensor diaphragm to calculate the total water depth. The 4-electrode conductivity sensor measures the true or specific electrical conductivity of the water from 0 to 120 mS/cm.
The CTD-Diver can store a maximum of 144,000 measurements (date/time, pressure, temperature, and conductivity) in its working memory and 144,000 measurements in its backup memory.
The CTD-Diver has the following sample methods: fixed length intervals, event-dependent, averaging, and pumping tests. The measurements are stored in fixed length or continuous memory (fixed length only).
The CTD-Diver is available in the following pressure ranges 10 m, 50 m, 100 m, and 200 m.
The CTD-Diver features:
- Innovative ceramic housing technology
- Three sensors in one sealed housing
- Conductivity range up to 120 mS/cm
- Compact size: Ø 22 mm – length 135 mm
- Various measurement methods
- Memory: 144,000 measurements of time stamp, pressure, temperature and conductivity with backup
- 200-meter pressure range version available
Micro-Diver
Measuring only 88 mm (3.46″) in length and 18 mm (0.71″) in diameter, the Micro-Diver is Van Essen’s smallest Diver. The Micro-Diver® is a submersible datalogger for long-term, uninterrupted, real-time water level monitoring using a pressure sensor when submerged at a fixed level under the water surface. The pressure sensor measures the equivalent hydrostatic pressure of the water above the sensor diaphragm to calculate the total water depth. The Diver autonomously measures pressure and temperature and records them in its internal memory. The Diver is ideal for ground and surface water level applications.
The Micro-Diver is specifically designed for monitoring wells or drive-points too small to accommodate larger dataloggers. In addition to its compact size, the Micro-Diver’s memory capacity can store up to 48,000 measurements (date/time, pressure and temperature) – almost one measurement every ten minutes for an entire year.
The Micro-Diver has the following sample methods: fixed length intervals, event dependent, averaging and pumping test.
The Micro-Diver is available in the following pressure ranges: 10 m, 20 m, 50 m and 100 m.
The Micro-Diver features:
- Compact size: Ø 18 mm – length 88 mm
- 48,000 records of time stamp, pressure and temperature
- 30-Point Pressure Factory Calibration
- Pre-programmed and user defined pumping tests
Remote Monitoring
The Diver-Link is a durable and easy to install telemetry unit for remote monitoring of ground and surface water levels. The Diver-Link features a compact design with the latest 4G/LTE wireless technology and can be used in a variety of bore hole locations such as flush mount and stick-up wells.
The Diver-Link is part of a complete telemetry solution. A remote monitoring system that integrates field instrumentation with wireless communication and data management to effectively manage (ground)water resources. The Diver-Link is suitable for continuous long and short-term monitoring projects.
The Diver-Link transmits data from a single Diver datalogger, connected by a DXT Cable, over a cellular or mobile network. Up to 3 Divers can be connected to the Diver-Link Triple. Both versions of the Diver-Link are available with an internal or external antenna. An external antenna provides better signal strength and coverage, especially in areas with poor reception or in case the Diver-Link is placed inside a metal well casing.
Configuration and management of the Diver-Link is done through the Diver-HUB web portal, a web portal for real-time management of site data, monitoring equipment and water levels.
Deployment of the Diver-Link is simple; insert the battery and connect the unit to a Diver. In the field, the Diver-Link can be operated using the magnetic function keys to activate the unit. Future firmware updates are automatically executed ‘over-the-air’, so there is no need for additional site visits.
- Connect up to 3 Divers
- Data logging and transmission
- Compact enclosure
- Lithium battery operated
- Internal or external antenna
- Barometric datalogger
- IP67 rating and magnet operated, Bluetooth Smart enabled
- Over-the-air firmware update
- Compatible with all Diver dataloggers and cables
If access to the well is limited, by fences or water for example, the Diver-DXT can be installed to wirelessly collect Diver data up to 500 meter.
The Diver-Gate(M) is a portable low-power device that communicates wirelessly with the Diver-DXT to retrieve data from Diver dataloggers within a range of 500 meters. The Diver-Gate(M) connects to a laptop equipped with Diver-Office.
The Diver-SDI integrates Divers with SDI-12 remote monitoring systems. A typical SDI-12 system illustrated in the figure below. On one end the Diver-SDI is connected to the SDI-12 system through the 3-wire SDI-12 bus, which also include the power supply of 12 Volt. On the other end a Diver cable (AS2xxx) is attached to connect the Diver-SDI to a Diver. Diver cables up to a length of 500 meters (1,640 ft) can be used with the Diver-SDI.
The Diver-MOD is the Modbus interface for Divers and is used to connect Divers to an RS485 network using the Modbus/RTU protocol. The Diver-MOD features a barometric sensor, which can be used to convert the Diver pressure in to a water level.
Software
Diver-App allows you to wirelessly connect to Van Essen Instruments Diver dataloggers from your phone or tablet via Bluetooth and the Diver-Mate. Diver-App is available at no cost at the Google Play Store.
With Diver-App, you will be able to:
- Read Diver settings
- Start and stop your Diver datalogger
- Validate real-time Diver and manual measurement data
- Validate the Diver time and project time
- Download data from your Diver-Mate and Diver datalogger
- Display downloaded data in a graph
- Share your data via other apps, for example WhatsApp or e-mail
- Transfer your data automatically to the Diver-HUB web portal (or your own FTP server)
Start/stop and other features can be switched off to prevent unwanted changes.
Streamline your fieldwork workflow and make decision-making in the field easier with Diver-Field.
Diver-HUB® is an easy-to-use, cloud-based web portal delivering centralized and secure access to your groundwater monitoring data from anywhere in the world – allowing you to manage groundwater monitoring data in real-time on your desktop, smart phone or tablet. Diver-HUB analyzes Diver datalogger time-series, and creates interactive maps and graphs based on your monitoring data, effectively keeping track of all hardware deployed in the field and supporting the overall management of your monitoring network.
Diver-Office is an important part of your water level monitoring workflow and supports all Diver equipment. Setup your monitoring projects and identify your fieldwork tasks; such as a site visit sequence, collection of Diver data and deployment of Divers. Use Diver-Field to carry out the fieldwork and download Diver data. Once the data collection is complete, use Diver-Office to merge time series, barometrically compensate the Diver data to convert them into water levels. Visualize data including manual measurements and export data to MON, CSV or XLSX files for further use in third-party applications.