The WatchGas PDM mono Family Bump and Docking Station keeps the monitor correctly configured and tested and fully functional. Bump testing portable monitors is becoming more and more prevalent in the market. Ensuring sensors are responding to a known concentration of gas remains the best way to verify <BR/>the monitor has not become impeded. User friendly single button operation<BR/>Efficient because of wide operating temperature range<BR/>Easy to transport and lightweight<BR/>Battery powered<BR/>Automatic log storage