Page 14
770-300M Issue E
www.skcltd.com
Passive or Active Sampling
Connect the outlet hosetail of the IOM sampler body at the rear of the sensor head to the inlet
hosetail of the air sample pump using a suitable length of 1/4” bore flexible tubing (such as
Tygon tubing). The tubing can be passed through the coiled sensor cable which will help prevent
snagging of the tubing on the worker’s clothing.
The pump flow rate must be adjusted to 2 l/min using a suitable air flow calibrator such as the
SKC chek-mate and a calibration adapter for the IOM sampler (SKC part number 391-01).
In Active mode with a size selective foam plug fitted to the IOM inlet at the front of the sensor head
the Split2 monitor will respond to the respirable fraction. Without a size selective foam fitted to
the IOM inlet the Split2 monitor will respond to the inhalable fraction.
If a filter sample is to be taken for subsequent gravimetric and/or chemical analysis, place a 25mm
diameter filter into the supplied IOM cassette (part of the sensor head assembly). Pre-weigh the
filter and cassette and then fit it into the IOM body at the rear of the sensor head. Ensure that all
of the sealing O rings are in place (refer to Sensor Head Exploded Diagram on page 6). The sensor
head must be removed from the bracket to enable this.