## 3 Survey Results
### Sensing  
Table 3 lists the sensing subsystem and sampling characteristics used in deployments. \begin{table}
\begin{tabular}{c l l l l} \hline \hline
**Nr** & **Codename** & **Sensors** & **Sampling rate, Hz** & **GPS used** \\ \hline
1 & Habitats & temperature, light, barometric pressure, humidity and passive infrared & 0.0166667 & n \\
2 & Minefield & sound, magnetometer, accelerometers, voltage and imaging &? & y \\
3 & Battlefield & magnetometer, acoustic and light & 10 & n \\
4 & Line in the sand & magnetometer and radar &? & n \\
5 & Counter-sniper & sound & 1,000,000 & n \\
6 & Electro-shepherd & temperature &? & y \\
7 & Virtual fences & - &? & y \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Deployments: sensing. Figure 2: **Maximum mote count in surveyed deployments, in each year— peak size in the years 2004–2006; over 100 motes used. ** \begin{table}
\begin{tabular}{l l l l l} \hline
**Nr** & **Codename** & **Sensors** & **Sampling rate, Hz** & **GPS used** \\ \hline
8 & Oil tanker & accelerometer & 19,200 & n \\
9 & Enemy vehicles & magnetometer and ultrasound transceiver &? & y, on powered \\  & & & nodes \\
10 & Trove game & accelerometers and light &? & n \\
11 & Elder RFID & RFID reader & 1 & n \\
12 & Murphy potatoes & temperature and humidity & 0.0166667 & n \\
13 & Firewxnet & temperature, humidity, wind speed and direction & 0.8333333 & n \\
14 & AlarmNet & motion, blood pressure, body scale, dust, temperature and & \(\leq 1\) & n \\  & & light & \\
15 & Ecuador Volcano & seismometers and acoustic & 100 & y, on BS \\
16 & Pet game & temperature, light and sound & configurable & n \\
17 & Plug & sound, light, electric current, voltage, vibration, motion & 8,000 & n \\  & & and temperature & & \\
18 & B-Live & light, electric current and switches &? & n \\
19 & Biomotion & accelerometer, gyroscope and capacitive distance sensor & 100 & n \\
20 & AID-N & pulse oximeter, Electrocardiogram (ECG), blood pressure & depends on queries & n \\  & and heart beat & & & \\
21 & Firefighting & temperature &? & n \\
22 & Rehabil & temperature, humidity and light &? & n \\
23 & CargoNet & shock, light, magnetic switch, sound, tilt, temperature and humidity & 0.0166667 & n \\
24 & Fence monitor & accelerometer & 10 & n \\
25 & BikeNet & magnetometer, pedal speed, inclinometer, lateral tilt, & configurable & y \\  & & Galvanic Skin Response (GSR) stress, speedometer, CO2, & sound and GPS & \\
26 & BriMon & accelerometer & 0.666667 & n \\
27 & IP net & temperature, luminosity, vibration, microphone and movement detector &? & n \\
28 & Smart home & Light, temperature, humidity, air pressure, acceleration, &? & n \\  & & gas leak and motion & & \\
29 & SVATS & radio Received Signal Strength Indicator (RSSI) &? & n \\
30 & Hitchhiker & air temperature and humidity, surface temperature, solar &? & n \\  & & radiation, wind speed and direction, soil water content and & & \\  & & suction and precipitation & & \\
31 & Daily morning & accelerometer & 50 & n \\
32 & Heritage & fiber optic deformation, accelerometers and analog temperature & 200 & n \\
33 & AC meter & current & \(\leq\) 14,000 & n \\
34 & Coal mine & - (sense radio neighbors only) & - & n \\
35 & ITS & anisotropic magneto-resistive and pyroelectric & varies & n \\
36 & Underwater & pressure, temperature, CDOM, salinity, dissolved oxygen & \(\leq\)1 & n \\  & and cameras; motor actuator & & \\
37 & PipeProbe & gyroscope and pressure & 33 & n \\
38 & Badgers & humidity and temperature &? & n \\
39 & Helens volcano & geophone and accelerometer & 100,000? & y \\ \hline \end{tabular}
\end{table} 
Table 3: _Cont._The most popular sensors are temperature, light and accelerometer sensors (Figure 3). _Design rule 4_: The WSN operating system should include an Application Programming Interface (API) for temperature, light and acceleration sensors in the default library set. **Figure 3. Sensors used in deployments**--Temperature, light and acceleration sensors are the most popular: each of them used in more than 20% of analyzed deployments.