A heater limit switch is used to prevent a heater from reaching dangerous temperatures. While the purpose of a heater is to warm up an area, it is possible for a heater to get too hot. When this happens, this can cause a fire hazard. Luckily, that’s what a heater limit switch is for. This switch will cut off the power to a heater so that it can cool back down.
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The Heater Limit Switch
This 2511 switch senses the surrounding air temperature and opens its contacts once things get too hot. A heater is wired to the two terminals on the switch so that the switch can shutoff power to the heater. Once the air temperature cools back down, the contacts will close and power will be restored to the heater. This means that you don’t have to worry about restarting your heater after the switch turns it off.
Our 2511 series switches can be used in high current applications; carrying up to 25 amps at 240VAC, for over 100,000 cycles (30 Amps at 12VDC for 30,000 cycles). These switches are available in a single-pole, single-throw device. A 3/4″ bimetal thermodisc at the heart of our thermostat is set to a precise temperature range within 0-350°F (-18-176°C). The temperature range determines when the thermal switch will close, or engage the electrical circuit, and when it will automatically reset, or open. Over 40 standard temperature ranges are available.
For more information on limit switches in heaters, check out this article.
If you would like to know more about the various applications our snapdisc thermostats are used in, click here!
For more information about our snap disc thermostats, click here.
Senasys is also able to provide custom options to fit your specific requirements. If you are unable to find a snapdisc that fits your specific needs, contact us!
As always, we love to hear from our customers about how they use our products. If you have an interesting application, tell us more about it here!