kingsnake.com - reptile and amphibian classifieds, breeders, forums, photos, videos and more

return to main index

  mobile - desktop
follow us on facebook follow us on twitter follow us on YouTube link to us on LinkedIn
 
click here for Nature Zone
This Space Available
3 months for $50.00
Locate a business by name: click to list your business
search the classifieds. buy an account
events by zip code list an event
Search the forums             Search in:
News & Events: Herp Photo of the Day: Gecko . . . . . . . . . .  Herp Photo of the Day: Reticulated Python . . . . . . . . . .  Central Illinois Herp Society Meeting - Dec. 01, 2022 . . . . . . . . . .  Exoticon Pet Expo Salisbury MD - Dec. 03-04, 2022 . . . . . . . . . .  Greater Cincinnati Herp Society Meeting - Dec. 07, 2022 . . . . . . . . . .  Madison Herp Society Meeting - Dec. 09, 2022 . . . . . . . . . .  All Maryland Reptile Show - Dec. 10, 2022 . . . . . . . . . .  York County Reptile Show - Dec. 11, 2022 . . . . . . . . . .  Madison Herp Society Meeting (Milwaukee) - Dec. 14, 2022 . . . . . . . . . .  Madison Herp Society Meeting (FoxValley) - Dec. 14, 2022 . . . . . . . . . .  Lancaster Herp Society Meeting - Dec. 16, 2022 . . . . . . . . . .  Northern Virginia Reptile Show - Dec. 17, 2022 . . . . . . . . . . 

rack system heating question


[ Follow Ups ] [ Post Followup ] [ The Caging Forum ]

Posted by markg on April 28, 2003 at 10:57:04:

In Reply to: rack system heating question posted by rick s. on April 27, 2003 at 21:21:30:

The Helix is a proportional controller - that is, it pulses the heater as needed to maintain the setpoint temperature. The heat tape temperature will stay within a close range (probably within a degree or less) of where you set it.

The standard waterbed controller is a thermostat - it has an ON-OFF differential. For example, heats to 80, contacts open, cools to 76, contacts close, heats to 80..etc etc. It works for a waterbed because the water temp changes slowly, so the thermostat contacts aren't cycling all the time. Heat tape or heat pads can change temperature very quickly, which means the thermostat contacts will be opening and closing all day long. Not good for metal contacts. (Proportional controllers use solid-state relays which can cycle open and closed millions of times with no wear and tear.) It can work but is just not the best tool for the application when you have a better choice.

Proportional is better for maintaining a more stable temperature on heat tape and ceramic emmiters. The waterbed thermostat will work but not hold the temp as constant and will cycle an aweful lot.


Follow Ups:




[ Follow Ups ] [ The Caging Forum ]