Liquid-Level Sensors - MTS Sensors

3.0 INSTALLATION AND MOUNTING
The method of mounting the Level Plus M-Series transmitter is dependent on the vessel or tank in which it is being used, and
what type of sensor is being mounted. Most applications will require one of two methods: threaded or flange mounting, shown
in Figures 3-1a and 3-1b below. See section 3.2 for detailed information about Sanitary application mounting.
3.1 Mounting Options for Rigid or Flexible Sensor
3.1a Threaded Flange Mounting
In applications with smaller vessels and tanks, the sensor can be mounted directly to the tank or flange via a
NPT threaded fitting, assuming there is a proper threaded connection available. If the float will not fit
through the flange, there must also be some means to mount the float on the transmitter from inside the vessel;
this may require an access port nearby the entry point of the transmitter (as shown in Figure 3-1a).
First, the float(s) is removed from the transmitter by removing the float retaining hardware. The tip of the
transmitter is inserted through the threaded vessel opening or flange. Before completely inserting the transmitter
to the bottom of the vessel, you must remount the float(s) through an access port and also reattach the
float retaining hardware.
The tip of the transmitter rod can now be lowered to the vessel bottom and the connection can be made from
the threaded NPT fitting to the vessel. In general, there should not be more than 12 inches of the transmitter’s
rod extending above the vessel.
3.1b Welded Flange Mounting
The M-Series transmitter can also be mounted to a tank flange (as shown in Figure 3-1b). First, install the
float(s) onto the transmitter. Second, install the float retaining hardware on the tip of the sensor. To complete
the installation, mount the transmitter, flange and float(s) as a unit in to the tank. In general, there should not
be more than 12 inches of the transmitter’s rod extending above the vessel.
Figure 3-1a
Threaded Flange Mounting
for Rigid and Flexible Pipe
Figure 3-1b
Welded Flange Mounting
for Rigid and Flexible Pipe
NPT Fitting
Riser
Tank flange
(provided by customer
or ordered separately)
Float access port
Welding sleeve
1.125 in.
(28.6 mm) dia.
Flange (welded)
Tank flange
Riser
Stainless steel
flexible sensor pipe
Product
float
Interface
float
Tip of transmitter
Tip of transmitter
Bottom-fixing weight,
magnet, or hook
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