Lesson 3/Learning Event 1
Step 1. Snap both ends of the detector tube at the scorings and press the unmarked end of the
detector tube into the adapter. Then, with the detector tube pointing down, compress the bulb 60
Step 2. Remove the detector tube from the adapter. If a blue ring appears in the detector tube, AC is
Figure 28 on page 57 shows a summary of the tests using the detector tickets and the detector tubes.
To concentrate vapors for sampling for suspected surface contamination, use a small can or box.
Place the can or box over a portion of the suspected area for about five minutes. Then punch a hole
in the can or box. Hold the detector ticket directly over the hole. If using a detector tube, insert it
into the hole. Do not allow the ticket or the tube to touch the contaminant. Recap reagent bottles
immediately after use. This will prevent contamination of the reagents. Return the bottles to the kit
Collect Samples of an Unknown Chemical
Agent Using the M18A2 Chemical Agent Detector Kit
The M18A2 Chemical Agent Detector Kit is capable of detecting the presence of unknown chemical
agents. Although the kit cannot identify these agents, it can be used to take samples of them. These
samples can then be sent to a field laboratory designated in the unit's SOP. There the suspected
agent can be identified.
The Procedure for Collecting a Sample of an Unknown Chemical Agent. When no positive tests are
obtained with the detector tickets or the detector tubes, the following procedure should be used.
Step 1. Take out a report card from the kit. Complete the card. Be sure to record any information
which may be helpful in determining the nature of the unknown agent. This information should
include identification of the unit taking the samples and the place, date, and time the samples were
taken. Observed characteristics of the agent should be recorded. Its effect on soldiers should be
noted. In addition, the observed color effects on the various types of detector tubes should be
Step 2. Select an area for sampling. This area should be one that is likely to have a high
concentration of agent. A depression in the ground or just above a puddle of liquid agent would be
Step 3. Take samples in five white-band sampling tubes.