Stove Use Monitoring System (SUMS)
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 |
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 / |
8192 - 8 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 / |
8192 - 8 bit / |
1 sec to 273 hrs |
For more detailed information on specifications of the iButtons see the 
DS1921G Data Sheet (463.07 kB) or the DS1922T and DS1922L Data Sheet (576.97 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 quotes on kit sizes not listed below.
SUMS Kit Price List
|
Number of iButtons |
DS1921G | DS1922L | DS1922T |
| 5 |
$130 | $235 | $325 |
| 10 | $210 | $410 | $625 |
| 15 | $300 | $600 | $860 |
| 20 | $390 | $790 | $1,135 |
| 25 | $435 | $900 | $1,405 |
| 30 | $515 | $1075 | $1,560 |
| 40 | $675 | $1,425 | $2,070 |
| 50 | $775 | $1,650 | $2,400 |
Individual components are also available for purchase at the following prices:
probe: $5.00
usb adapter: $23.50
processing software: $99.00
individual iButtons:
| Quantity | DS1921G | DS1922L | DS1922T |
| 1-5 | $21.00 | $44.00 | $64.00 |
| 6-25 | $20.00 | $41.50 | $60.00 |
| 26-45 | $19.00 | $38.50 | $55.00 |
| 46-50 | $17.00 | $34.00 | $50.00 |
| 50+ | call for quote | call for quote | call for quote |
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: http://ehs.sph.berkeley.edu/hem/?page_id=12.
