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Marcland draw off systems come as a controller, a temp. probe and a draw off valve.
You mount the control box anywhere it is convenient for you to access, mount the temp. probe from the top and down...

MARCLAND has had a Barometric Compensated Auto Draw-Off for over fifteen years. These units work fine but are actually "OVERKILL" and usually cost much more than a regular On/Off auto draw-off. As...

As for your standard draw off valves...they are normally closed, and just on/off.
PID control os used for tougher, faster processes. Maple syrup production temperature is SLOW REACTING
and only...

The third wire is for temperature compensation and lead length reistance balance.
Using two wires you will get drifting as the ambient temperature cahnges and the contoller warms up and cools down....

Hey, this is almost a direct COPY of the Marcland Economy Draw off. Even the labels are correct...wow!
Where did all your research and expertise come from???
This is usally how the Off Shore...

these OLD draw off units are Quebec made CHOLETTE. They are 6 and 12 vdc valves. The temperature contoller is a"filled" bulb probe where temperature causes the fill to expand and moves contacts...

It is a Marcland Economy Draw Off #EDA-TP3-1"V3 list $728.00.
One of several models available. It still performs as all other Marcland units.
Dual 0.1F display, reading, setting and accuracy.
This...

Danno, if you have a ball valve in front of your on/off auto draw-off valve....start closing it down and let a smaller amount of syrup to draw off more often.
You should be able to force your auto...

Sunrise Metal Shop in Topeka Indiana make superior evaporators ....and high polished as well.
Their equipment is made with heavier gauge stainless and the workmanship is almost flawless.
They are...

An RTD is more accurate, stable, will indicate tenths of a degree F, is unaffected by ambient temperature changes around the sugarehouse and the controller. It generates resistance (ohms) in a very...

Boiling point of water is directly linked to barometric pressure.
Barometric pressure takes into account elevation, so you just need to use a good barometer. Here is a simple MARCLAND baro/boil chart