HTM-20N Series
HITROL CO., LTD. 7
The HTM-20N Series is installed on the top or the side of a container and silo to detect the
upper or the lower limit, respectively. The level switch can be installed on any material, so it
is applicable to ferrous or nonferrous tanks and silos.
When installing this product, considering the following:
Side Installation (Horizontal Installation)
■ A-Type or B-Type can be installed on the side of a tank. A screw-socket shape under 24mm
shall be used for installing the A-Type on the side. Otherwise, dust or foreign matter may enter,
resulting in a malfunction. The extended B-Type supports the screw and the flange.
■ When side installation, it shall be installed slopingly (more than 15°) with a direction of
wider side of tuning fork vertically to avoid build-up of the medium on the tuning fork.
(Refer to Fig. 1)
■ Sensor shall be installed at the place far from inlet of the tank and protector shall be installed
in order to protect the sensor from damage by falling medium if it is installed at the inlet. The
protector shall have sufficient area to protect the sensor from incoming medium and be
installed at a distance that does not affect sensor operation. (Refer to Fig. 1)
■ Cable lead-in inlet shall be installed facing the ground as shown in the figure. (Refer to Fig. 1)
■ Sun cover shall be installed to protect the housing from the damage by direct sunlight. (Refer to Fig. 1)
Top Installation (Vertical Installation)
■ Both B-Type and the C-Type can be installed
with the socket or flange on top.
■ Sensor shall be installed at the place far
from inlet of the tank.
■ Sun cover shall be installed to protect the
housing from the damage by direct
sunlight. (Refer to Fig. 1.)
When installing the product, install it using a tool that fits the hexagon connector of
the screw.
Max. Length shall be 500mm or less for the side installation.
For the side installation, an arrow on the connection shall be located on the top.
Attachment
& Precautions
<Fig. 1>
Sun Shade
Protector
