Chatter datalogger

Logging data today is not just processing data such as oxygen, pH or levels. We measure and log data from reservoirs, lakes, rivers, streams, creeks, groundwater, surface water, harbors and many other places to help adapt and improve our infra structure.

Logging data far away from urban areas is handled by a battery powered data logger, that gather information and send the information to a SCADA system, dedicated databases or even as e-mails when its suitable to do so.

Publicly placed data loggers are vandal protected, and will send a warning when intruders act.

Sending data once a day will provide at battery life time of up to 5 years.

Information on ground water levels and early warning sewer systems in correlation with buildings nearby urban construction can save millions of Euros in damage.

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    Get information via the public GSM/GPRS network

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    Ready to Give Early Warning

    By sending warning in case of heavy rain

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    Chatter can do on-site calculations on stormflow and more

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    Leak Monitoring

    On levels in storage tanks and sends alarm e.g. a text messages upon sudden level drops

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    MJK will continue to develop firmware and software

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    Easy installation via application wizards

Chatter is an advanced data logging device, developed by MJK to be working stable and secured in the nature, just as well as in wells, storm flow systems and public places.
Chatter records the levels via MJK Digital Expert Hydrostatic Level Transmitters, stores the data and transfers data via GSM/GPRS as e-mail, SMS or directly to SCADA using the standard ModBus RTU protocol.
Chatter is mainly used to register ground water levels, and storm flow incidents.
Furthermore, today the Chatter can also calculate rain intensity and compare this to defined time frames and the data can be used to start pumps, thereby avoiding sewage overflow.
Warnings are send from the device in case of low battery or unauthorized access. This makes it easier to plan maintains routines, as the Chatter does not need manned monitoring.

Chatter is used to monitor and log ground water levels, pressure, temperature, flow etc. in drinking water distribution network systems and boreholes, placed on long distances from main power supply.
Data transmissions can be via a simple SMS or as e-mail with attached CSV package on over cell phone network GSM/GPRS to SCADA systems.

Chatter is perfect for logging the level and state of spare basins. The Chatter works independently of power resources as it is battery powered.
The logged data can be transferred via GSM/GPRS on schedule or triggered by alarms.
The incoming data can with great advantages be used for to overview the level of for instance sludge tanks, spare basins and clearing tanks.

In Denmark alone more than 1,200 Chatter devices are constantly monitoring water level in ground water, lakes streams and such, in the forest areas the data is providing the Danish Nature Agency with important data on how the nature changes, or if there are immediate danger of flooding on roads or areas.
To save power, the Chatter only supplies power to the connected MJK Expert Hydrostatic Level Transmitters while they actually measure, this often lasts for approximately 10 seconds. This will make the battery will last up to 5 years.
Chatter is also used on many construction sites, to monitor the lowering of the ground water level, to give a warning in regards to avoid damage to the construction site and structures.

Here you see the wall mounted Chatter version, logging the stormflow from a V-Notch in a sewage stormflow construction.

Right next to the mounted cabinet, you can see the antenna. 

Chatter data logger provides a vandalism alarm, sending a SMS in case of an intruder. This is often used to protect the Chatter devices placed in forests, or similar places, but the alarm function has also proven popular with water works, providing additional security on their invaluable resources.

A Chatter data logger will work for up to 5 years without maintenance.

That makes Chatter perfect for monitoring in the nature.

This Chatter device is placed to monitor the level of the lake, and will send the data for statistical usage. The device will send a warning in case of vandalism, or if running out of battery.

Chatter Link Introduction Video

short intro video showing the installation process and a brief guide to the UI

Chatter Wall 1. Intro

Introduction to the Wall mounted version of Chatter

Chatter Tube 1 Introduction

A short introduction video to Tube mounted Chatter



The separate up to five years additional warranty contract must be ordered upon ordering of your MJK product.


Power supply
Built-in 3,6 VDC, 19 Ah lithium battery
Better than 5 years@1 measurement/day and 1 call/day
Memory storage
RTU and E-mail version: 90.000 measured values (date- and timestamped)
Build-in GSM/GPRS quad-band 850/900/1800/1900 MHz modem w/ on-board SIM- card holder
Digital inputs
4 pcs. 2 - 5 VDC (min. time for state 1 second)
Analog inputs
4 pcs. 0 - 2,5 VDC
Serial Data input
1 pcs. RS-485 Modbus® com port for max. 4 units Modbus® RTU-mode, 9600 baud, 2-wire RS-485, Master mode, Function 3, Read only