Check with the industrial sales rep for Honeywell HVAC instruments. I
have some older Honeywell units that have 50' capillary tubes. I didn't
see any of these in the McMaster catalog.

Karl Townsend wrote:
Each of the evaporators in the apple cooler has a thermostat like item C on
page 603 of http://www.mcmaster.com/ They are mounted on the 13' ceiling in
the dark area behind the evaporator. I have to climb to the top of a 10 foot
step ladder to adjust them and they need several adjustments per season. My
old tired eyes almost can't see the dial anymore, trying to look through
bifocals to the ceiling while holding a flashlight and leaning over a stack
of apple boxes just ain't fun.

So, I'm looking for a better thermostat. First I looked at an electronic
thermostat - item E on the same Mcmaster page 603. I could move it about
four foot down the wall as it has a longer bulb length. That would put it
9-10' high on the wall. easier to see but still need a ladder.

Then I noticed item 331K21 on page 544. If I could lengthen the cables from
3' to 30', the control unit could be placed near the cooler walk door at eye
level - no more ladder. It says the sensor is a thermistor probe with a 3.5'
cable. So, can a thermistor probe cable be lengthened?

Or, any other good suggestions? I'd really like to adjust cooler set point
without a ladder and at the front of the room if at all possible. The back
evaporator often gets stacked in. FWIW, any thermostat just energizes a 220
VAC solenoid to let the refrigerant flow.

Karl