Instruments: Stove Use Monitoring System (SUMS)

2011 World Bank BEIA IMG_2062

The Stove Use Monitoring System (SUMS) provides information on adoption of new technologies and their effect on cooking habits. SUMS are based on low-cost commercially available temperature loggers coupled with our fit-for-purpose processing software developed with the Kirk Smith Research Group at the University of California-Berkeley. By recording stove temperature, SUMS provides insights into usage patterns, number of meals cooked and time of use.

The sensors we use in the SUMS are Maxim iButtons. These sensors connect to a computer or hand-held device via a probe and usb adapter for launching and uploading data.

There are several types of iButtons that can be used with cookstoves. It is important that the stove’s maximum temperature does not exceed the ibutton’s temperature range. The 8,192 data point capacity of the DS1922L and DS1922T iButtons translates to readings every seven minutes for 40 days.

iButton Model Temperature Range Accuracy Resolution Memory (data points) Logging Rate
DS1921G -40°C to +85°C ± 1°C: -30°C to +70°C
± 1.3°C outside this range
0.5°C 2048 1 to 255 min
DS1922L -40°C to +85°C ± 0.5°C: -10°C to +65°C 0.5°C – 8 bit /
0.0625°C – 11 bit
8192 – 8 bit /
4096 – 16 bit
1 sec to 273 hrs
DS1922T 0°C to +125°C ± 0.5°C: +20°C to +75°C 0.5°C – 8 bit /
0.0625°C – 11 bit
8192 – 8 bit /
4096 – 16 bit
1 sec to 273 hrs

For more detailed information on specifications of the iButtons see the DS1921G Data Sheet (414 kB) or the DS1922T and DS1922L Data Sheet (505 kB).

Berkeley Air markets a SUMS kit consisting of iButtons, a probe, usb adapter, launching software, processing software, heat resistant tape and an instruction manual. Kits can be bought with any number of iButtons. Please contact us for pricing information and quotes on kits.

Individual components are also available for purchase. Contact us for for more information.

References on SUMS development and performance

Low-cost temperature dataloggers as Stove Use Monitors (SUMs). Ruiz-Mercado, I., Lam, N., Canuz, E., Davila, G., Smith, K.R. Boiling Point. 55:16-18. 2008.

Adoption and sustained use of improved cookstoves. Ruiz-Mercado, I., Masera, O., Zamora-Maldonado, H., Smith, K.R. Energy Policy. In press, 2011.

These publications are available at the Household Environmental Monitoring website.