TESTO 6381 Instruction Manual page 128

6 testo 6610 probes
B1 Duct mounting of probe
Only atmospheric processes up to approx. 1000 hPa positive
pressure. Alternatively, the single-hole duct holder (order no.
0554 1793) can also be used.
128
1 Engage transmitter in
the holder on the end of
the duct probe
2 Wall/duct holder (order
no. 0554 6651)
3 Hole  12.5 mm
4 max. 70 mm