Dendrometer Data Logger DL18 BLE
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1. Introduction
Thank you for purchasing our ECOMATIK DL18 BLE data logger set. This BLE-enabled
(Bluetooth Low Energy) data logger is an outstanding choice to be used in combination
with ECOMATIK dendrometers (all models), temperature sensors (leaf: LAT-B2; air, sur-
face, tissue, soil: T-Surface/-Tissue/-Soil), air temperature and humidity sensor (T/RH-
Sens), soil moisture sensor (EM 35) or light sensors (PAR: EM 20, Pyranometer: EM 25).
Using the four channels of the DL18 BLE you can operate up to 4 dendrometers, or other
sensor combinations. The DL18 BLE can be conveniently configured and the logged data
read out via mobile devices (Andriod, iOS) or PC (Windows10).The logger is powered by
two user replaceable batteries. In standard use the batteries will last more than one year.
2. Components
After unpacking you should have following items:
1 dendrometer logger with two AAA alkaline batteries already inserted
1 weather box for using the logger under outdoor conditions
1 bag of desiccant (dry silica gel)
2 two wood screws for mounting the logger box
Fig. 1: Dendrometer Data Logger (DL18 BLE)
3. Safety information and Maintenance
For the functionality it is very important to protect the logger against moisture. Screw the
cable gland firmly and replace the silica gel when necessary. In tropical regions the pro-
tection from moisture is particularly important.
In normal use the battery lasts for more than a year. But remember, some batteries have
poor quality. Therefore, it is useful to log the battery voltage. Check the battery indicator at
data download. If you are planning a long measurement period under low temperature,
you should use Lithium batteries instead of provided alkaline batteries. Lithium battery has
much better properties at low temperature.
