Fire Sensor

An inexpensive paper sensor could help detect deadly wildfires sooner than watchtower observers, foot patrols and satellites can spot them. It’s composed of ionic liquids – molten salts that are printed onto ordinary paper at a cost of about 40 cents per sensor. The sensors generate an electrical signal whenever an abrupt temperature change is detected. The heat also provides power, eliminating the need for batteries.

A network of sensors could be placed at the bases of trees to send signals wirelessly to nearby receivers. The network is one component of the complex and highly coordinated effort involved in fighting these fires; the developers hope that saving critical time at the onset will translate into better overall outcomes.

In addition to further testing, the next step will be to expand the wireless range, which is now limited to about 100 meters, as well as to develop a protective shield for the devices.