1. Direct Reading Scale.
In this type, the colorimetric stain varies in length proportional to the amount of gas or vapor being measured. The concentration is read directly off a scale etched on each tube.

2. Chart Comparison Tubes. This type works similar to the direct reading type above. A sample is taken and the stain length is compared to a printed concentration chart enclosed with each box of tubes.

3. Color Comparison Tubes. In this type, the intensity of color change, rather than the length of stain, is compared to a standard color chart.

4. Multi-Part Tube Sets. The multi-part tube sets use a pre-treat or primary reaction tube in addition to the detector tube. The “front-end” tube scrubs the sample air of either moisture or potentially interfering gases, which might otherwise cause erroneous results.

Operation is Simple
Only three easy steps are needed to operate the detector: first, you break off the tips of a fresh detector tube; second, you insert the tube, with arrow pointing toward the pump, into the pump’s inlet; third, you pull out the pump handle to automatically lock, and the pump begins to draw a 100cc sample through the detector tube. A proprietary Sample Vue indicator shows when sampling is completed. More detailed information is on an instruction card enclosed with each pump and box of detector tubes. The precision sampling pump is certified by the Safety Equipment Institute (SEI).