Hydro Logger H40
User manual
FIEDLER
electronics for ecology
9
2.1.
Mechanical design
The Hydro-Logger H40 is housed in a cylindrical stainless steel housing with a diameter
of 40 mm, which is terminated on one side with a K2 connector for connecting the sensor
and on the opposite side with a K1 communication connector for connecting a PC (lap-
top). The H40G variant of the instrument equipped with a built-in GSM/GPRS communi-
cation module has a small SMA coaxial connector next to the K1 connector for connect-
ing an external GSM antenna.
The robust mechanical design protects the electronic circuits from external interference as
well as from adverse climatic influences and is highly resistant to intentional and unintentional
mechanical damage.
LEVEL METER WITH TSH22 PROBE
Typically, the Hydro-Logger H40 is used as a level gauge to monitor wa-
ter level and temperature. In this case it is convenient to order the H40
station together with the TSH22 sensor and the DH40 stainless steel
mounting bracket. The bracket includes clamps for mounting the H40
station and a screw hanger for clamping the cable of the submersible
transducer (TSH22). The entire measuring assembly can then be sus-
pended from the bracket, e.g. in a borehole. The small dimensions of the
H40 station itself and the DH40 holder allow the measuring assembly to
be placed in a borehole with an inner diameter of only 50 mm.
Detail of the DH40 bracket mounting holes, the DA284 filter location
on the connector body and the TSH22 level sensor cable attach-
ment.
The special hydrostatic level sensor cable contains a capillary to com-
pensate for the atmospheric air pressure acting on the submerged sen-
sor. A semi-permeable filter located on the body of the level gauge con-
nector prevents air moisture from penetrating the capillary to the sensor
electronics and possible subsequent corrosion inside the level gauge.
M o u n t i n g b r a c k e t
D H 4 0
F i l t e r D A 2 8 4