The Senasys’ manual reset limit switch is a temperature sensing device with normally closed contacts. The contacts open (limit) at a factory set point. Once that limit is reached, a human must manually press the red reset button for the switch to return back to the normally closed state. Manual reset limit switches are commonly found in areas where temperature should not increase and needs to be looked at before returning back to normal before the equipment or appliance can work again. Common appliances you will find manual reset limit switches are in are generators, coffee makers, and water heaters.
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MANUAL RESET LIMIT SWITCH OPTIONS
Senasys designs and manufactures two different manual reset switches – 25 Amps or 15 Amps at 120VAC.
Our 25 Amp manual reset thermostat switch is available with exposed caps, great for unique applications which require a faster response time. The 15 Amp manual reset switches are available in many different mounting options for custom applications.
Senasys manual reset thermostat switches are UL approved and made in the U.S.A.
25 AMPS – 404 SERIES
The 404 series is our 3/4″ manual reset snap disc. This series is ideally suited for application where you want to call special attention to a specific temperature malfunction. The 404 series feature a trip-free operation. Physical depression of the reset button holds the contact open and renders the device inoperative until the reset button is released. These switches are available in a single-pole, single-throw device, rated up to 25 Amps at 120VAC. Our 404 manual reset snap disc thermostats have a temperature range of 100-350°F, ±25°F differential. Many standard ranges are available, or we can easily design a custom temperature range to suit your application. Visit our online store for our standard temperature ranges. For a custom temperature, contact our technical support.
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15 AMPS – 432 SERIES
The 432 Series is our 1/2″ manual reset snap disc. This series is ideally suited for applications where you want to call special attention to a specific temperature malfunction. The 432 series can be used as a safety limit that will break on temperature rise. The thermostat requires a human to intervene as the switch must be manually reset once tripped. These switches are available in a single-pole, single-throw device, rated up to 15 Amps at 120VAC. Our 432 manual reset snap disc thermostats have a temperature range of 100-350°F, with a differential temperature of 25°F minimum. Many standard ranges are available, or we can easily design a custom temperature range to suit your application. Visit our online store for our standard temperature ranges. For a custom temperature, contact our technical support.
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For more information about our manual reset switch, check out our below articles!
Manual reset or auto reset? How to pick the correct switch for your application.
Manual reset limit switch FAQ.
I am supporting electrical commissioning of an air separation unit in Indianapolis, IN for Messer LLC.
We have an immersion heater in the lube oil system of a major piece of equipment.,
The heater (Wattco) was supposed to be provided with a high limit switch set at 175F with manual reset.
It did not meet either criteria.
Does Senasys have a unit that could meet this specification?
the control system is 120VAC with a load of less than an amp.
The existing switch has a 40″ +/- capillary.
We should have something that works for you. I’ll send you an email and we can figure out what part would work for you. We offer custom temperatures that aren’t listed on our website, so I’m sure we’ll be able to find something that fits your application.