Quick Installation Guide
00825-0200-4809, Rev CA
September 2003 Flange-Lok 485 Annubar
STEP 2: DRILL HOLE INTO PIPE
1. Determine the sensor size based on the probe width (see Table 2).
2. Depressurize and drain the pipe.
3. Select the location to drill the hole.
4. Determine the diameter of the hole to be drilled according to the
specifications in Table 2. Drill the mounting hole into the pipe with a
hole saw or drill. DO NOT TORCH CUT THE HOLE.
Table 2. Sensor Size / Hole Diameter Chart
5. If opposite-side support model is supplied, a second identically
sized hole must be drilled opposite the first hole so that the sensor
can pass completely through the pipe. (To determine if you have an
opposite-side support model, measure the distance from the tip to
the first slot or hole. If the distance is greater than 1 in. (25.4 mm),
it is the opposite-side support model.) To drill the second hole,
follow these steps:
a. Measure the pipe circumference with a pipe tape, soft wire, or
string. (For the most accurate measurement the pipe tape needs
to be perpendicular to the axis of flow.)
b. Divide the measured circumference by two to determine the
location of the second hole.
c. Re-wrap the pipe tape, soft wire, or string from the center of the
first hole. Then, using the number calculated in the preceding
step, mark the center of what will become the second hole.
d. Using the diameter determined in step 3, drill the hole into the
pipe with a hole saw or drill. DO NOT TORCH CUT THE HOLE.
6. Deburr the drilled holes on the inside of the pipe.
Sensor
Width
Sensor
Size Hole Diameter
0.590-in.
(14.99 mm)
13/4-in.
(20 mm)
+ 1/32-in (1 mm)
– 0.00
1.060-in.
(26.92 mm)
215/16-in.
(35 mm)
+ 1/16-in. (1 mm)
– 0.00
1.935-in.
(49.15 mm)
321/2-in.
(65 mm)
+ 1/16-in. (1 mm)
– 0.00 Drill the appropriate diameter
hole through the pipe wall.
Note: Drill the hole 180° from
the first hole for opposite- side
support models.
4809-0200 Rev CA.fm Page 9 Monday, September 22, 2003 11:13 AM
