How High Temperature Protection Works
Process Heat Conducts Up the Convoluted Stainless Body
The convoluted stainless steel body extension creates a long, tortuous thermal path between the process connection and the switch housing. This geometry slows the rate at which heat travels up toward the electrical components.
Finned Rings Radiate Heat Away from the Housing
Integrated finned rings along the body extension dramatically increase the surface area exposed to ambient air. Heat is continuously radiated and convected away before it can reach the switch housing. The number of finned rings is precisely matched to the required maximum temperature rating.
Electrical Components Stay Within Their Rated Temperature Range
By the time the thermal path reaches the micro-switch and housing, the combination of convoluted geometry and finned ring dissipation has reduced the temperature to within the electrical components' rated operating range — preserving accuracy, reliability, and service life.
Temperature Configurations
Finned-Ring Body Extension Design
For temperatures above 400°F, PEECO flow switches are supplied with variable-length convoluted stainless steel body extensions featuring integrated finned rings. The number of finned rings is precisely matched to the required maximum temperature rating — more rings for higher temperatures.
Thermally isolates electrical components from extreme process heat
Rapidly dissipates heat away from the switch housing
Preserves switch accuracy and long-term reliability
Extends service life in continuous high-temperature operation
E Series (left) and N Series (right) with finned-ring body extensions
Typical Applications
Furnaces and kilns
Industrial ovens and dryers
Thermal oxidizers and incinerators
Hot gas exhaust and combustion air systems
High-temperature chemical processing
Power generation and refinery services
Steam and condensate monitoring
Boiler feed and hot water systems
Ordering the High Temperature Option
Specify your maximum process temperature when requesting a quote. PEECO will match the correct number of finned rings and body extension length to your temperature requirement. The high temperature option is available on all N, E, and H Series flow switches across all mounting styles.
Also consider the Teflon option for corrosive high-temp mediaSpecifications
| Maximum Temperature | 1,500°F (816°C) |
| Standard Configuration Limit | Up to 300°F — no extension required |
| Micro-Switch Upgrade Limit | Up to 400°F — high-temp micro-switch only |
| Body Extension Material | Convoluted stainless steel |
| Heat Dissipation Method | Integrated finned rings — count matched to temperature rating |
| Compatible Series | N Series, E Series, H Series |
| Ordering Note | Specify maximum process temperature when ordering |