6700 Portable Sampler User Manual - Isco

6700 SAMPLERS
STRAINERS
Isco offers four strainers that help prevent solids from clogging
the suction line:
Stainless steel strainer for priority pollutant sampling
Polypropylene strainer for routine sampling conditions
CPVC strainer for acidic liquid sources
Stainless steel low-flow strainer
To select the right strainer for your application, refer to Table 8.
Debris Deflector
A debris deflector prevents debris from accumulating on the hose
clamp that attaches the strainer to the suction line.
Alternative to Strainers
When sampling from high velocity streams with heavy sus-
Attaching the Debris Deflector
pended solids, some field investigations suggest that more representative
samples are obtained without the strainer. Consider
attaching a short piece of thin walled aluminum tubing to the
end of the suction line; anchor the tubing so that the inlet opens
upstream. The aluminum tubing’s thin wall will not disturb the
flow stream, and most sample analyses disregard aluminum
ions. Under most conditions, the presample purge removes any
debris over the tubing entrance.
Table 8 Selecting the Right Strainer
STRAINER DIMENSIONS APPLICATION MAXIMUM DEPTH
Stainless Steel
Polypropylene
CPVC
Stainless Steel
Low-Flow
.430
diameter
.430
diameter
.430
diameter
23/32
23/32
23/32
1
.430
diameter
9-9/32
9-5/8
11-1/4
7
47
1-1/8
diameter
1-1/4
diameter
1-1/4
diameter
1.0
diameter
1.0
diameter
9/16
diameter
1-5/8
diameter
Prioritypollutant
sampling.
Routine
applications.
Highly acidic
liquids.
Very low flow
stream depths.
Vinyl Line:
22 feet.
Teflon Line:
15 feet.
Vinyl Line:
11 feet.
Vinyl Line:
4feet.
Vinyl Line:
7feet.
Notes: The suction lines will float when filled with air during the purge cycles and when depths exceed the listed
ratings. Secure the suction lines when sampling at depths exceeding the maximum ratings.
All strainer dimensions are in inches.
Teflon suction line is compatible only with the 1 inch diameter, stainless steel strainer.