Campbell CS510 User Manual download pdf (Page 7)

Campbell Scientific CS511-L Sensorex Dissolved Oxygen Probe

3. Optional Probe Accessories

Agitator for stagnant conditions.

Membrane replacement tool.

DO electrolyte, 500 ml.

Teflon membranes, 5 pack.

Teflon membranes, 25 pack.

4. Optional Agitator

The PT4 Agitator is a reliable and robust agitator for use in conjunction with

probes subjected to bio-fouling in ponds and stagnant water conditions.

probes require a minimum water velocity across their membranes to function

properly. Therefore, to measure DO in stagnant water conditions, it is necessary

to move the water past the membrane to get accurate and reliable DO

measurements. In many instances the water also has a high bio-loading and the

probes become fouled resulting in inaccurate DO measurements.

FIGURE 4-1. Preventing Bio-fouling of the CS510-L

The PT4 Agitator overcomes these problems. The device is designed so that a

soft bristle brush sweeps across the probe membrane or sensor tip. This sweeping

action of the brush provides the required water velocity as well as prevents the

membrane from becoming bio-fouled.

The optimum sweeping frequency depends upon the design of probe and type of

membrane used and water conditions. An ON-time of 0.25 seconds and OFF-

time of 5 seconds is suitable in most circumstances.

Agitator’s overall size: 7-1/8" x 3-1/4" diameter, 1-1/4 lb. (180mm x 83mm, 0.6 kg)

Supplied with 10 ft. (3 meters) cable.

Power required: 10.5 to 18 VDC at the agitator, 1.1 amps. Maximum ON-time is

3 seconds.

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Campbell CS510 User Manual Page 7