Eko Temperature sensor accuracy...

I thought my sensor was reading low, because a temp sensor ( Azel ds 60p) on my supply to storage and house always reads 5-6 deg hotter than the boiler sensor, and when I set my boiler to 195 deg I had all kinds of problems so I keep it 183 deg. I checked to make sure the sensor was seated in the well and it seemed fine.

Mine sets on top of the boiler not in a well and when I hit it with a infa red it reads with in 1* of the digital gage My azel temp gage on the out side of my boiler is - 5* cooler. Have you set any of your hysteresis on your control settings?


Rob

Mine is within a degree or two as verified by several digital gauges downstream of my boiler outlet. Maybe you have a bad one. I would say your experience hardly constitutes all eko sensors being "a joke".

I also have a sensor attached to the top of the EKO, I placed a pice of fire rated EPDM (from commercial roofing) between the boiler body and the temp sensor to achieve a slightly higher boiler temp, and to try to protect the probe if an overheat situation occured.

I have a pid temp controler that controls the temp leaving the boiler, and the temp for the boiler controller varies up to 10* at times depending on when in the burn and other variables. The probe is on the top of the boiler where my pid probe is in the line going out. When I put cold wood in, or when there isn't alot of coals the boiler temp will only be 8* or so low. Then after it's been in a hot burn and alot of coals are there it might be only 2* low. I think it's reading more the temp of the water just above the chamber where my pid is reading the water as it comes off the hx tubes. I read where the garn does sort of the same thing. You would think the temp would be uniform but it don't seem to be that way. You can fool the probe by placing it in a different location but becarefull or you could cause an overheat situation.
leaddog

I have been suspecting my EKO 40 reads at least 10* less but that is based on downstream measurements and just a hunch right now. If it warms up like it is supposed to next week I may shut down for awhile to flush, make a few piping changes, and add my thermowells for my one wire sensors as well as mechanical thermometers too. Hopefully, with the Dallas and a mechanical one right at the output I will know for sure. Without storage right now mine is set at 183 and it creeps up 4-5 degrees after it goes into idle. This is even with water circulating 24/7 through my homemade barn heater (w/coil fan off) which pulls probably 5-10k btus with fan off. I hope to crank it up to 195 when I add storage if it indeed is reading low. I wouldn't doubt whether EKO designed some cushion on these sensors intentionally. If I can get 180 on the storage tanks I will be happy. I think Jbeatty mentions something in one of his posts indicating it takes much more wood to get the storage up beyond this point.