
18021-0 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $29.99 | Top Pick! Condition is New – Open box, Fenwal 18021-0 Thermoswitch Thermostat -100 To 400 F 120/240V, shipping cost = $8.99 | 99.8% |
![]() | $30.00 | Condition is New – Open box, New Open Box Fenwal 18021-0 Temp. Range -100 to 400F Thermoswitch 51784HM, shipping cost = $17.56 | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $21.99 | Top Pick! Condition is Used, New Open Box Fenwal 18021-0 Temp. Range -100 to 400F Thermoswitch 51784HM, FREE SHIPPING | 99.8% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $21.64 | Condition is D'occasion, FENWAL CONTROLS 18021-O THERMOSWITCH THERMOSTAT SWITCH -100 TO 400F + BRACKET, shipping cost = $20.75 | 100.0% |
![]() | $21.64 | Top Pick! Condition is D'occasion, FENWAL CONTROLS 18021-0 THERMOSWITCH THERMOSTAT 10-120VAC 5-240VAC -100 TO 400F, shipping cost = $20.75 | 100.0% |



The Thermoswitch 18021-0 is a versatile and reliable temperature switch designed for both 120V and 240V AC applications. This device is an essential component in various electrical systems, offering precise temperature control and safety features.
The Thermoswitch 18021-0 is constructed with high-quality materials, ensuring durability and longevity in harsh operating environments. It features a robust, corrosion-resistant housing that can withstand extreme temperatures and humidity, ensuring reliable performance even in challenging conditions.
The thermoswitch operates based on a bimetallic strip, which expands or contracts in response to changes in temperature. This mechanism allows the switch to accurately detect and respond to temperature fluctuations within the range specified by the user. The switch can be set to activate at a predetermined high temperature or low temperature, depending on the application requirements.
The Thermoswitch 18021-0 is easy to install and use, with clear and concise instructions provided in the user manual. It features a screw terminal connection for easy wiring, and the switch can be mounted on a DIN rail or directly to a surface using the included mounting brackets.
Safety is a top priority with the Thermoswitch 18021-0. The device includes an over-temperature protection feature, which automatically shuts off power to the system if the temperature exceeds the set limit. This feature helps prevent damage to electrical components and reduces the risk of fires.
In summary, the Thermoswitch 18021-0 is a reliable and versatile temperature switch that is suitable for a wide range of applications. Its durability, accuracy, and safety features make it an excellent choice for maintaining optimal temperature control in various electrical systems, such as HVAC systems, industrial machinery, and appliances.
Pros of buying Thermoswitch 18021-0:1. Reliable: The Thermoswitch 18021-0 is a reliable temperature switch that is designed to work with both 120V and 240V AC power. It is a common choice for industrial applications due to its durability and reliability.
2. Wide temperature range: The Thermoswitch 18021-0 has a wide temperature range, allowing it to be used in a variety of applications. It can switch from off to on at temperatures between 140 F and 220 F (60 C and 104 C).
3. Easy to install: The Thermoswitch 18021-0 is easy to install, making it a convenient option for DIYers and professionals alike. It can be mounted on a flat surface or in a panel using the included mounting hardware.
4. Cost-effective: The Thermoswitch 18021-0 is a cost-effective option for temperature control applications. It is a relatively inexpensive device compared to other temperature control solutions.
Cons of buying Thermoswitch 18021-0:1. Limited adjustability: The Thermoswitch 18021-0 has a fixed temperature range of 140 F to 220 F (60 C to 104 C). This may not be suitable for applications that require more precise temperature control.
2. No digital display: The Thermoswitch 18021-0 does not have a digital display, making it difficult to monitor the current temperature. This may be a drawback for applications that require real-time temperature monitoring.
3. Limited input voltage range: The Thermoswitch 18021-0 is designed to work with a voltage range of 120V to 240V AC. This may not be suitable for applications that require a wider voltage range.
Conclusion:Overall, the Thermoswitch 18021-0 is a reliable and cost-effective option for temperature control applications. It has a wide temperature range and is easy to install. However, it has limited adjustability, no digital display, and a limited input voltage range. If precise temperature control or real-time temperature monitoring is required, a different temperature control solution may be more suitable.
Recommendation:If you are looking for a reliable and cost-effective temperature switch for a wide range of industrial applications, the Thermoswitch 18021-0 is a good option to consider. However, if more precise temperature control or real-time temperature monitoring is required, you may want to consider a different temperature control solution.
Details:
Pressure regulator valves. Relief valves. Safety and security. Valve bodies and manifolds.
Diverging valves. Rotary lobe blowers. Check valves.
Roller chains.
specifications indusswitch:
- brand: Thermoswitch
- mpn: 18021-0
- part type: Switch
- product condition: New Without Factory Packaging
- voltage: Ac , 240 V-ac
payments indusswitch:
- credit card: discover
- wallet: apple-pay
shipping indusswitch:
- transit: 6-6 days
- class: standard, expedited, one-day
- type: fixed
- service: standard, expedited, overnight
returns indusswitch:
- time: 30 days
- policy: returns accepted
- paid by: seller
- method: money back
seller indusswitch:
- city: delta, ohio
- rating: 99.9%
- # reviews: 109762
general indusswitch:
- category: Business & Industrial > Electrical Equipment Supplies > Switches > Accessories
offer indusswitch:
- started: april 18, 2024
- best offers: true
- options: ship-to-home
- in stock #: 5
- prices: $21.64–$30.00
- item condition:
- New – Open box
- Used
- D'occasion
- availability: in stock
- sold #: 32




