Want to Buy WTB: Tray Warmer

Trader history for Renato Tonelli (13)

removed account4

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hi renato

not sure if this sort of stuff is helpful, or not, i haven't ever needed a tray warmer
( i have a washing tray that i drilled holes into and use as a water jacket with warm running water instead )

(there was a url link here which no longer exists)
(there was a url link here which no longer exists)

i tried to find the hog warming blanket murray and evan were posting about but couldn't find it
( the seedling warmers are still there though )

i did find a waterproof theromostatically controlled warmer
http://www.dhgate.com/product/new-w...lectric/268783946.html#s1-2-1;disc|4025737120

i also found something you just stick in the microwave oven and it stays warm, but it doesn't have a thermostat ...
http://www.sheepman.com/ecommerce/ecomm_product_details.asp?prodid=1800&source=cat&catid=55

good luck !
john
 

AgX

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Another alternative could be a dish-warming plate to put on a dinner table. Adding an inline dimmer might get the temperature low enough.
But then there would be no thermostatic control. One "just" would have to find setting that yields an equlibrium state at the desired temperature.

Electric safety with trays of conductive fluid on such plate is another issue to consider.

A further alternative might be a bain-marie set-up with a larger tray and a low power aquarium heater.
 
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Renato Tonelli

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AgX said:
A further alternative might be a bain-marie set-up with a larger tray and a low power aquarium heater.
Click to expand...

I have been using this very system when I need the temperature to be 24C; it gets much harder to maintain it when the requirement is a much higher temperature; the added problem is that I am using a darkroom where the air condition system is centralized.
 

Steve Goldstein

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For B&W printing I use a non-thermostatic warmer from Kane Manufacturing, along with a variac. Over time I've found a variac setting that's pretty stable, giving a very slow temperature rise, maybe a couple of degrees Fahrenheit per hour. I turn off the variac when the thermometer in my developer tray shows the temp is too high, which I define as 73F or above, and I turn it back on when the temp goes below about 66F. A chart derived from the Zone VI compensating timer allows me to adjust my developing times for the indicated temperature so I always develop for the equivalent of 2.5 minutes at 68F.
 
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