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Re: Temp sensors

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Posted by Bill on Monday, 5 May 2008, at 1:26 p.m.,
in response to Re: Temp sensors, posted by Phil

I know that the sensors work fine with the WEL up to at least 60 - 70 °C, as I have one of my WEL sensors installed on a pipe that periodically gets very hot.

I use this sensor as my 'on/off' sensor for a gas-fired hot water heater. It's mounted on the gas exhaust pipe that exits through the roof. The sensor is WEL-scaled in °C, with a -50° offset factor.

I use the 'zero transition' as the on/off indicator by having a WEL Expression 'GasOn = D04 > Zero', where D04 is the sensor with the -50° offset.

Then, since GasOn is a binary zero or one value, to make it useful for charting purposes, I have another WEL Expression 'GasOnScaled = GasOn + Zero' with a 60 multiplication scale factor.

An example chart is show below.

In summary, up to at least about 70°C, the sensors are working just fine for me.

Best regards,

Bill

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