Select a Mounting Configuration
The flow meter can be used with these transducer types: DTTR, DTTN, DTTL, DTTH, DTTSU and DT94 . Meters that use
transducer sets consist of two separate sensors that function as both ultrasonic transmitters and receivers . The transducers are
clamped on the outside of a closed pipe at a specific distance from each other .
The transducers can be mounted in:
• W
-Mount where the sound traverses the pipe four times . This mounting method produces the best relative travel time
values but the weakest signal strength .
• V
-Mount where the sound traverses the pipe twice .
V
-Mount is a compromise between travel time and signal strength .
• Z
-Mount where the transducers are mounted on opposite sides of the pipe and the sound crosses the pipe once .
Z
-Mount
yields the best signal strength but the smallest relative travel time .
Transducer
Mount Mode
Transducer
Pipe Material
Pipe Size
W-Mount
DTTR/DTTN/DTTH
Plastic (all types)
2…4 in . (50…100 mm)
Carbon Steel
Stainless Steel
Copper
Ductile Iron
Not recommended
Cast Iron
DTTL
Plastic (all types)
8…16 in . (203…406 mm)
Carbon Steel
Stainless Steel
Copper
Ductile Iron
Not recommended
Cast Iron
V-Mount
DTTR/DTTN/DTTH
Plastic (all types)
4…12 in . (203…406 mm)
Carbon Steel
Stainless Steel
Copper
4…30 in . (100…750 mm)
Ductile Iron
2…12 in . (50…300 mm)
Cast Iron
DTTL
Plastic (all types)
16…48 in . (406…1220 mm)
Carbon Steel
16…36 in . (406…915 mm)
Stainless Steel
Copper
16…48 in . (406…1220 mm)
Ductile Iron
16…30 in . (406…750 mm)
Cast Iron
Z-Mount
DTTR/DTTN/DTTH
Plastic (all types)
> 30 in . ( > 750 mm)
Carbon Steel
> 12 in . ( > 300 mm)
Stainless Steel
Copper
> 30 in . ( > 750 mm)
Ductile Iron
> 12 in . ( > 300 mm)
Cast Iron
DTTL
Plastic (all types)
> 48 in . ( > 1220 mm)
Carbon Steel
> 36 in . ( > 915 mm)
Stainless Steel
Copper
> 48 in . ( > 1220 mm)
Ductile Iron
> 30 in . ( > 750 mm)
Cast Iron
Table 2: Transducer mounting modes for DTTR, DTTN, DTTL and DTTH
Transducer Installation
Page 20
November 2016
HYB-UM-00090-EN-04