Termometros para PC

For monitoring temperature on solar water heating systems, greenhouses,
data centers and so on.
Monitoring can be done over the internet.
Alarms can be sent by email.
Humidity, solar radiation and other variables can be read as well, using
the same technology.

My name is Ricardo Seelmann, I'm an electric engineer and I'm interested in solar water heating systems, because of the fuel cost savings and also trying to decrease the air pollution. On the roof of my house in Santiago, Chile, I have installed solar water collectors along with an insulated tank.

	I have also setup sensors to monitor temperatures in the system. This is useful in order to optimize the collectors position, to know if there is any failure, to check how good is the system doing and see if something needs to be modified. The same sensors can be used on any industrial or home process where temperatures have to be known and recorded. In my solar water heating system I am measuring temperatures at 5 different points: collector, tank, incoming water, outgoing water and ambient. The sensors are of the "1-wire" type and are all connected in parallel using a 2-wire phone cable to the serial port of a PC, through a special adaptor. Sensors can be several meters (up to 100 meters) away from the PC. For long distances it should be used a UTP Cat 5 cable.
	Program LOGTEMP reads the sensors every couple of minutes, according to user configuration. Data is received by the PC, shown on screen, stored and transmitted to a web site. You can check my home system online by clicking on www.lula.cl/solar. Graphics are in real time, updated every 5 minutes. Alarms can be set and you can have the system send you an email, should an alarm condition occur.
	Temperature sensors to be connected to a PC Sensors can be purchased from Lula . They are handcrafted products, but they work pretty good.