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The device is a small blue box that measure the rate of temperature rise rather than detecting smoke which helps in reducing false alarms.[5] The network of Lumkani devices in a specific slum uses radio frequency to send text messages and notify people in cases of emergencies. An alarm will be activated in all houses within a 60 metres (200 ft) radius if the initial alarm is not disarmed within 30 seconds.[6][7]

The device detects fires by sensing for a rate of rise of temperature, rather than smoke, which would cause many false alarms. In the event of a fire, the detectors communicate to one another by means of radio frequency (RF) to create a community wide alert – the alert is transmitted to neighbouring detectors within a 60m radius of the fire, giving the community at large the necessary advanced warning to deal with the fire before it becomes unmanageable.

Lumkani is a social enterprise known for its fire detector and system designed to overcome the shack-fire challenge in urban slums in South Africa and across the globe with the use of a heat detection technology. It measures the incidence of harmful fires and alert families inside the shack of the danger, using the rate-of-rise of temperature

Lumkani is a tech company and social enterprise that delivers insurance services dedicated to customers who suffered loss of property or life following slum fired in South Africa and beyond. The company got its name from local Xhosa language, “lumkani” meaning “be careful”. Their main product is a small blue box fire alarm that responds to a rise in temperature rather than smoke with the aim of decreasing false alarms. Its associated network alerts houses within a 200 foot radius if the alarm is not shut off within 30 seconds. In 2014, the company reported having distributed 7000 of these devices across slums in South Africa, and 5000 in 2015 to its highest fire risk neighborhood in Cape Town.

JUMO manufactures and distributes a wide range of measurement, control and automation products. The company is among the world leaders in two areas, namely temperature measurement and control for industries as diverse as food, water treatment, pharmaceuticals, renewable energies, railways, shipbuilding, heating and air conditioning, as well as the plastics and petrochemical industries.