senasys
3/4″ Epoxy Sealed Snap Disc Thermostats
Senasys manufactures 3/4″ Epoxy Sealed Snap Disc Thermostats, like the 2570 series, is a unique thermostat switch designed for extended use in extreme environments. It is built using our patented metal sleeve rivet construction and sealed to protect against salt spray, water, moisture and heat.
custom options
Designed & manufactured to meet requirements of original equipment manufacturers worldwide.
high quality
Senasys products are 100% tested before they leave our facilities.
certified
All of our snap disc units are UL approved (USR) and the 2511 family is also Canadian Standard approved (CNR).
made in u.s.a.
Designed & manufactured in Eau Claire, WI, U.S.A.
The 2570 series is a unique thermostat switch designed for extended use in extreme environments. It is built using our patented metal sleeve rivet construction and sealed to protect against moisture and heat. These sealed thermostats are highly versatile, carrying up to 15 Amps at 120VAC. The 3/4″ bi-metal thermodisc within is set to a precise temperature range between -21°-220°F (-29°-105°C). The temperature range determines when the thermal switch will close, or engage the electrical circuit, and when it will automatically reset, or open.
The 2570 Series 3/4″ Epoxy Sealed Snap Disc Thermostats are manufactured with a high temperature ceramic insulated base encased in a protective nylon boot. Devices are sealed, have a comparative tracking index of +600 per UL 746A and IEC 112; water absorption of 0% and exceptional heat resistance.
2570 Series Sealed Thermostats feature a patented metal sleeve rivet construction listed by many European approval agencies with 4mm over surface clearance current carrying parts to ground. The 3/4″ thermal element of the device with its fast response and sensitivity characteristics is processed to maintain close tolerances and narrow differential performance for extended life.
FEATURES
- 3/4″ Bi-Metal Disc
- Sealed thermostats meet MIL-STD-202 specification for humidity, moisture resistance, salt spray, freeze and thaw, and shock and vibration.
- High environmental exposure temperature range of -21°-220°F (-29°-105°C).
- Differential temperature range of 15-80°F (-9 – 25°C).
- Automatic Reset
- Single-pole, single-throw (SPST)
- 15 Amps at 120VAC, 100,000+ cycle life
- Variety of mounting brackets, including pipe mounts.
- Variety of wire lead options available, standard: 18AWG – 12″ or 72″, covered with 1/32″ or 1/16″ thick 100°C plastic insulation. Other custom wire leads, such as gauge, color, length, & connectors available. Contact us for more information.
- UL Approved
- Made in USA
For a more economical solution, Senasys has built relationships with overseas suppliers to provide our customers thermostats at a lower cost, with the same high quality as our snap disc thermostats built in the U.S.A.
Mounting Options
With snap discs, different applications will require a different snap disc mounting style. Temperature switches can be installed in a variety of environments, and the right mounting bracket is needed to make sure that the switch is able to perform accurately. Even if a switch functions at the right temperature, the wrong bracket can cause it switch at the wrong time or even not switch at all. See a variety of available mounting options below, or click here to learn more.
If you need a style that isn’t shown here, contact us! We offer custom bracket options as well.
Select from a variety of mounting options below.
Standard Temperature Options
Below is a list of our common, off the shelf, bi-metal temperature options. Custom temperature options available. Please contact us.
Disc Number
Temperature
356
Close 15°F, Open 5°F (±3°F)
640
Close by 35ºF max, Open by 25ºF min
618
Close 45ºF, Open 34ºF (±5°F)
518
Close 50°F, Open 40°F (±5°F)
669
Close 65ºF, Open 40ºF (±5°F)
563
Close 70ºF, Open 60ºF (±5°F)
029
Close 80ºF, Open 65ºF (±5°F)
047
Close 90°F, Open 80ºF (±5°F)
351
Close by 100ºF max, Open by 85ºF min
021
Close 110ºF, Open 95ºF (±5°F)
201
Close 120ºF, Open 105ºF (±5°F)
152
Close 130ºF, Open 115ºF (±5°F)
121
Close 140ºF, Open 110ºF (±5°F)
078
Close 150ºF, Open 135ºF (±5°F)
216
Close 170°F, Open 155 (±5°F)
214
Close 180ºF, Open 165ºF (±5°F)
185
Close 200°F, Open 185ºF (±5°F)
Disc Number
Temperature
2204
Open 15°F, Close 5°F (±5°F)
2164
Open by 30ºF max, Close by 20ºF min
2166
Open by 40ºF max, Close by 30ºF min
2132
Open by 45ºF max, Close by 35ºF min
750
Open at 50ºF ±5°F, Close at 40ºF ±5°F
2085
Open 60ºF, Close 50ºF (±5°F)
1671
Open 70ºF, Close 60ºF (±5°F)
702
Open 95°F, Close 85°F (±5°F)
227
Open 100ºF, Close 85ºF (±5°F)
180
Open 110°F, Close 100°F (±5°F)
256
Open 120°F, Close 110°F (±5°F)
157
Open 130°F, Close 120°F (±5°F)
155
Open 140ºF, Close 125ºF (±5°F)
269
Open 150°F, Close 140°F (±5°F)
311
Open 160°F, Close 150°F (±5°F)
312
Open 170°F, Close 160°F (±5°F)
304
Open 180°F, Close 170°F (±5°F)
707
Open 190°F, Close 180° (±5°F)
454
Open 200ºF, Close 185ºF (±5°F)
863
Open 220ºF, Close 205ºF (±5°F)
Frequently Asked Questions
YOUR QUESTIONS, ANSWERED.
Our snap disc thermostats are created with bimetal discs in them that react to temperature changes (rise or fall) and ‘snap’ causing the circuit to open or close. We form our discs from one of three bimetal compositions. Click here to learn more.
For small quantities, we can build anything from -20°F to 220°F. Contact us for higher temperatures.
Our epoxy sealed thermostat switches are UL rated for 100,000 cycles 15 Amps at 120VAC / 10 Amps at 240VAC, and 0.5 Amps at 24VDC. We did some additional testing in house. Check out our results here!
Our standard wire leads are black, 18 AWG at 12″ or 72″ length. We recommend the 72″ length, and then cutting down to what you need. We have other options available including color, lengths and gauge sizes. Click here to learn more.
Senasys manufacturers two different lines of sealed thermal switches, 431 series and 2570 series, which are UL873 approved to be hermetically sealed. Our sealed snap disc thermal switches are commonly found in environments where condensation, dust or other material may be present.
Senasys performed a series of tests with our sealed thermostat switches by submerging them into fresh water and salt water. Click here to see the results!
Our complete switches aren’t rated for UL94, or any other particular flammability rating for that matter, individual components are. We did some testing in-house as well. Check out the results here!
Senasys tests our snap disc thermostats through air, fluid, hot plate and other testing standards. Learn more about our quality inspection here.
Continuity! Whether you have a hot or cold temperature thermostat, this test is easy and one of the first things we ask customers. Learn how to do so here.
For these types of switches 10ºF is about the smallest range they can maintain cost effectively and consistently.
For complex systems actual testing is usually pretty important. We support this process by making it easy to test multiple package styles and disc temps in sequence or all at once just give us a call. Learn more about temperature differentials here.
Our standard tolerance is between 5°F to 10°F, but tighter tolerance options are available. We also offer a min/max type. Click here to learn more, or contact us with your requirements.
The location of the temperature switch inside your heating element should be well thought through. Temperature will change in various locations within the system depending on the heating element location. The further you distance from the heating element, the lower the temperature. Where a temperature switch is located will determine how accurate it can measure and control the system. Senasys typically recommends with all of our temperature switches the closer you can get to the heating element the better for the most accurate reading and fastest response time.
The 2570 series has an IP68 rating. To learn more about IP ratings, click here!
Cross Reference
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BRANDS
Senasys
2570 Series
Thermodisc
37T Series
3/4″ Bi-Metal Disc
Automatic Reset
Fixed Temperature
-20°F to 220°F
Single Pole, Single Throw
SPST
15 Amps @ 120VAC
100,000 cycles
Variety of Mounting Options – Pipe & Surface
Variety of Wire Options
UL Listed
Made in U.S.A.
Build A Thermostat
Follow the below nomenclature guide to determine the 3/4″ epoxy sealed thermostat to meet your application requirements.
Other custom body, wire options, and more available. Contact our technical support team to get started!
Request A Quote
Complete the form below with your application information, and a product specialist with follow up with you in 1-2 business days.