This sensor seems popular with the arduino crowd, however I see that it is only rated to 155 deg C. I need a sensor capable of reading around the range of 200 deg C with the reliability of +- a few degrees. Do you think I can push the LM35 this high or it won't work? Any suggestions on other sensors?
I don't think you can/should push it.
At higher temperatures an RTD is often used. Omega claims their RTD's are accurate to within ~2C at 200C:
The Ruggeduino (http://ruggedcircuits.com/html/ruggeduino.html): compatible with Arduino UNO, 24V operation, all I/O's fused and protected
Thanks. They make you buy in packs of 100 though :(. I didn't see any other cost effective RTDs. Is there a cheaper way I can read this temp?
Possibly automotive coolant temp sensors? I live by a junkyard.
How about one of these?
The Rugged Motor Driver (http://ruggedcircuits.com/html/rugged_motor_driver.html): two H-bridges, more power than an L298, fully protected
A K or J type thermocouple will read these temperatures.
To interface these you will need a thermocouple interface
IC which is typically an SMD part.
I am working with the MAX31855 and K-type thermocouples.
I should have a sketch and schematic later this week.
I am using my PICOBEE board http://wiblocks.luciani.org/PICO/PICOBEE-index.html (http://wiblocks.luciani.org/PICO/PICOBEE-index.html)
to periodically measure temperature and transmit the timestamped data
to a PC. The MAX31855 has a 14bit ADC and has a resolution
of 0.25degC. Not sure of the accuracy yet.
(* jcl *)
Thermistors won't last 200 DegC and their housings aren't rated for that temperature. I would use thermocouple too. If you don't need sub DegC accuracy, you can find cheaper infrared remote temperature sensors too.
I just added a thermocouple + XBee application hint to my site -- http://wiblocks.luciani.org/docs/app-notes/picobee-tc.html (http://wiblocks.luciani.org/docs/app-notes/picobee-tc.html).
I interface a K-type thermocouple using the MAX31885KASA. I use the RTC on the PICOBEE
to periodically interrupt the uC. After an interrupt the temperature is read. The timestamped
data is transmitted using the XBEE.
(* jcl *)