--- title: "Van Essen Instruments Diver DCX Water Level & Flow | Aethair" description: "Van Essen Diver groundwater dataloggers in the Aethair sensor catalog: 4 models for water pressure, temperature, and conductivity, read through Thiamis." url: https://aethair.io/sensors/van-essen-instruments-water-level-flow/ --- Sensors · Water Level & Flow # Van Essen Instruments Diver DCX Water Level & Flow Van Essen Diver submersible groundwater dataloggers: self-contained water-column pressure + temperature loggers, barometrically compensated via a companion Baro-Diver, with conductivity added on the CTD-Diver. Zirconia-ceramic models (Cera/CTD) resist brackish- and seawater corrosion. Read over SDI-12. [Schedule a call](https://calendly.com/d/ctdd-mkr-v9v/aethair-demo-website) [Build a Configuration](https://aethair.io/build/?params=water_pressure,water_temperature,conductivity) At a glance **3** parameters **4** models [**Connects via Thiamis** SDI-12](https://aethair.io/products/thiamis/) Measures ## What the Van Essen Instruments Diver DCX Measures 3 parameters, each linked to its page: the sensors, units, and standards behind it. [Water Pressure cmH₂O](https://aethair.io/parameters/water_pressure/) [Water Temperature °C](https://aethair.io/parameters/water_temperature/) [Conductivity µS/cm / mS/cm](https://aethair.io/parameters/conductivity/) [Connects via **Thiamis**](https://aethair.io/products/thiamis/) Wired interface [SDI-12](https://aethair.io/products/thiamis/#port-sdi-12) Models ## Van Essen Instruments Diver DCX Models 4 models, each with what it measures and the ranges its datasheet gives. | Model | Description | Measures & specs | | - | - | - | | **Mini-Diver** | Basic groundwater datalogger: water-column pressure (for level) and temperature. 316L stainless steel, Ø22 mm; fixed-interval logging, 24,000-reading memory. Not for seawater. | [Water Pressure](https://aethair.io/parameters/water_pressure/) [Water Temperature](https://aethair.io/parameters/water_temperature/) | | **Cera-Diver** | Zirconia-ceramic Ø22 mm pressure and temperature logger for brackish, salt, and other aggressive water; 48,000-reading memory. | [Water Pressure](https://aethair.io/parameters/water_pressure/) [Water Temperature](https://aethair.io/parameters/water_temperature/) | | **Micro-Diver** | Smallest Diver: Ø18 mm 316L stainless steel for wells/pipes ≥20 mm, logging water-column pressure and temperature with event, pump-test, and averaging modes; 48,000-reading memory. Not for seawater. | [Water Pressure](https://aethair.io/parameters/water_pressure/) [Water Temperature](https://aethair.io/parameters/water_temperature/) | | **CTD-Diver** | Ceramic Diver that adds a 4-electrode conductivity cell (0–120 mS/cm, true or specific conductance) to water-column pressure and temperature; for brackish/seawater and aggressive environments; 48,000-reading memory. | [Water Pressure](https://aethair.io/parameters/water_pressure/) [Water Temperature](https://aethair.io/parameters/water_temperature/) [Conductivity](https://aethair.io/parameters/conductivity/) | Solutions ## Where the Van Essen Instruments Diver DCX Is Used Solutions whose recommended configuration uses this instrument or whose standards it is built to, followed by solutions whose core panel it partly measures. ### [Water Quality Monitoring](https://aethair.io/solutions/water-quality/) Rivers, lakes, drinking water, and stormwater On the platform ## What the Van Essen Instruments Diver DCX Gets From Aethair Connected through Thiamis, its readings arrive in the same Environet account as Aethair's own monitors. ### [Live data and alerts](https://aethair.io/platform/environet/) [Environet](https://aethair.io/platform/environet/) shows the instrument live and alerts the people you choose by email, SMS, and webhook, at the thresholds you set. [Noesis](https://aethair.io/platform/noesis/) sets up a dashboard, a report, or an alert from a plain-text request. ### [Compliance reports](https://aethair.io/platform/reports/) [Aethair Reports](https://aethair.io/platform/reports/) produces scheduled or on-demand reports from the instrument's readings, as a PDF or secure link. Templates cover Aethair Blue, WELL v2, cabin air (ISO 23875), and the CMS-2567 healthcare codebook (ASHRAE 170), or you can report against custom limits such as OSHA PELs, NAAQS, EPA guidance, or your own program limits. ### [Dashboards and the app](https://aethair.io/platform/dashboards/) Environet dashboards and the [Aethair App](https://aethair.io/platform/app/) show the instrument's readings just like any Aethair device. The occupant-facing [Aethair Dashboards](https://aethair.io/platform/dashboards/) status display is built around Aethair IAQ and Aethair PRO. Similar ## Other Water Level & Flow ### [Temposonics](https://aethair.io/sensors/temposonics-water-level-flow/) [Water Level & Flow](https://aethair.io/sensors/temposonics-water-level-flow/) [Temposonics (formerly MTS Sensors) Level Plus LP-Series magnetostrictive liquid-level transmitters…](https://aethair.io/sensors/temposonics-water-level-flow/) Questions ## Van Essen Instruments Diver DCX FAQ Does a Diver measure water level or water pressure? Each Diver logs absolute water-column pressure (in cmH₂O) and temperature; the CTD-Diver also logs conductivity. Groundwater level is not stored directly. It is derived from the pressure by subtracting barometric pressure in Van Essen's Diver-Office software, so this integration ingests pressure rather than a computed level. Why is a separate Baro-Diver needed? A Diver measures absolute pressure, so it also senses the atmosphere pushing on the water surface. One Baro-Diver per site, at roughly the same elevation and within about 15 km, records barometric pressure so the software can compensate and recover the true water column. The Baro-Diver is a barometric reference and is not one of this driver's models. Which Diver models can be used in seawater? Not the Mini-Diver or Micro-Diver: their 316L stainless-steel housings corrode in brackish and salt water. The Cera-Diver and CTD-Diver use a zirconia-ceramic housing built for brackish, salt, and other aggressive environments. What conductivity does the CTD-Diver report? Its 4-electrode measuring cell (range 0–120 mS/cm) can be programmed to report either true conductivity at the sample temperature or specific conductance referenced to 25 °C (temperature coefficient 1.91 %/°C). Typical waters: tap 0.2–0.7, groundwater 2–20, seawater 50–80 mS/cm. How does the Thiamis integration read a Diver? Over SDI-12 (1200 baud, 7 data bits, even parity). An I-command returns the model, firmware, serial number, and battery percentage; an M-command then returns the measured values: pressure and temperature, plus conductivity on the CTD-Diver. Sources: [www.vanessen.com](https://www.vanessen.com/images/PDFs/Diver-ProductManual-en.pdf)