Web Data Loggers - Micro-Observatory

The most accurate data logging system for scientific data collection, DLK WMO-1, Web Micro-Observatory

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Whether you have the need to collect data from several sensors or 100 or more, the DLK WMO-1 is the answer.  Data loggers simply collect data, however the Micro-Observatory allows the user to collect raw data and calibrated data and can display it all on the web or directly to a PC or Mac.

AIS has developed a new unique system to collect timed data from almost any type of sensor.  Whether you are collecting multiple pH, temperature, conductivity, light, specific ion electrodes, or data from serial instruments the DLK WMO-1 allows for calibrated data collection from any sensor.

This is the most advanced analytical tool for precise measurements (24 bit AD) of any potentiometric electrode, conductivity electrode, light sensor, thermocouple, or any other sensor.

Standard Instrument Description


Web-based patent pending Micro-Observatory

Similar feature as the AIS WebPstat, ease of use, accessibility, wireless operation

Allows for up to 9 potentiometric, 3 conductivity, 3 light, and 3 thermocouple inputs from the front panel.

7 additional analog inputs from the back panel, including the ability to use   amperometric probes like polarographic oxygen sensors

Multiple RS232 inputs from any other type of instrument

24 bit resolution

Instrument Specifications


 u  9 High Impedance Electrometers

These inputs can be configured as single ended or true differential depending on the application.  The input range is +/- 8 volts.  The resolution is 1 uV/bits so you will not lose any data.

u  3 Conductivity Meters

These inputs allow you to connect up to 3 individual conductivity probes for precise data collection of conductivity.  The range of these units typically are from 1 ~ 100,000 micro-seimens, measured resolution is < 0.003% of the reading.


u  3 Photo-Current Meters

These inputs are configured to take data from any photodiode sensor. The range of these inputs are from 0 to ~ 8 mA with 1 nA/bit resolution.

u  3 K-type Thermocouple Amplifiers

These inputs have a range from -200° C ~ + 750° C with a resolution of 1,000 bits/C°, user calibration required for best accuracy.


u  7 Low Impedance Aux Voltmeters

These 7 inputs allow for low impedance devices to be connected to the instrument via a 25 pin connector.  The input range is +/- 8 volts.  The resolution is 1 uV/bits so you will not lose any data.

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A typical system configuration.  The standard Micro-Observatory comes complete with a pH sensor and thermocouple for lab applications.

Ask about our portable kits which include everything you need for short field deployments or long field deployments with a solar charging station.


The DLK-WMO-1 has been used to collect data from basic lab experiments to some very extreme field environments.

Field Application of the new micro-observatory being deployed at Yellowstone National Park, Fry Pan geyser area for the first time.


This photo shows the instrument being used at Yellowstone to monitor geyser chemistry.  The instrument is being set up with a laptop computer and will then be disconnected from the system so that it can run autonomously.  Sensors were deployed in several key areas of the geyser outflow.


This is a deployment at the Rio Tinto River site in southern Spain, where two distinct out flows are mixing.  Shown here the DLK-WMO-1 was placed in a shallow submersible housing with internal battery monitoring these two microbial mats.  A complete diurnal cycle was captured from these two distinct out flows.

This is a local fresh water pond in New Jersey.   Here an algae bloom is being monitored with pH, Eh, conductivity temperature and light probes over a complete diurnal cycle for several days.

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Here you can see the placement of the surface electrodes used in the pond above.  Electrodes were also placed at the bottom of the white rod to compare the surface with bottom sensors over time.  Several very interesting weather events occurred during the course of this monitoring.  Data was presented at a recent American Chemical Society Conference.

These are but a few applications of this new technology.  Only your imagination limits the applications of these instruments.

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