High-Temperature Duct-Mounted Flow Switches
Reliable Airflow Detection Up to 1,500°F
When airflow monitoring must perform in extreme heat, PEECO High-Temperature Duct-Mounted Flow Switches deliver dependable, long-term performance where standard switches fail. Engineered specifically for elevated air and gas temperatures, these switches provide accurate airflow indication in demanding industrial duct applications.
Designed for Extreme Heat Applications
Standard airflow switches are typically limited to 300°F, and even upgraded models struggle beyond 400°F. PEECO’s high-temperature duct-mounted flow switches are purpose-built to operate at air temperatures up to 1,500°F, making them ideal for furnaces, ovens, dryers, incinerators, and high-temperature exhaust systems.
Advanced Thermal Protection Design
For temperatures exceeding 400°F, PEECO utilizes variable-length convoluted stainless steel body extensions, engineered with integral finned rings. These finned extensions:
- Protect internal electrical components from extreme process heat
- Rapidly dissipate thermal energy away from the switch housing
- Extend service life in continuous high-temperature environments
The number of finned rings is precisely matched to the application’s maximum temperature requirement, ensuring optimal thermal protection without over-engineering.
When paired with PEECO’s high-temperature micro-switch, this design delivers reliable switching performance at temperatures other airflow switches simply cannot tolerate.
Precision Duct-Mount Construction
PEECO’s duct-mounted flow switches feature a robust mounting plate and an ultra-wide paddle designed to sense airflow accurately across large duct cross-sections. This configuration ensures dependable actuation even in low-velocity or turbulent airflow conditions.
Available Configurations
PEECO high-temperature duct-mounted flow switches are available in multiple configurations to meet application and code requirements:
- Explosion-Proof Models
- Non-Explosion-Proof Models
- High-Pressure Designs
Typical Applications
- Industrial furnaces and kilns
- Dryers and ovens
- Thermal oxidizers and incinerators
- Boiler exhaust and combustion air ducts
- High-temperature process ventilation systems
Why Choose PEECO?
- Proven performance in extreme heat environments
- Customizable temperature ratings up to 1,500°F
- Rugged stainless steel construction
- Flexible mounting and configuration options
- Designed for long service life and minimal maintenance
When airflow verification must survive extreme temperatures, PEECO high-temperature duct-mounted flow switches are the trusted solution.
High-Temperature vs. Standard 300°F Flow Switches
Not all airflow switches are designed to survive extreme thermal environments. The table below highlights the critical differences between PEECO High-Temperature Duct-Mounted Flow Switches and conventional 300°F-rated airflow switches.
| Feature | Standard 300°F Flow Switch | High-Temperature Flow Switch |
|---|---|---|
| Maximum Temperature Rating | 300°F (400°F with limited upgrades) | Up to 1,500°F |
| Thermal Protection | Minimal or none | Convoluted stainless steel body extensions with finned rings for rapid heat dissipation |
| Electrical Contact Protection | Direct exposure to process heat | Thermally isolated and protected from extreme temperatures |
| Performance in High Heat | Degraded accuracy, premature failure | Stable, reliable switching at extreme temperatures |
| Duct Mounting Capability | Limited paddle size and sensitivity | Ultra-wide paddle with robust duct mounting plate |
| Customization for Temperature | Fixed temperature limits | Custom finned-ring length matched to application temperature |
| Service Life in Hot Applications | Shortened due to heat damage | Extended service life in continuous high-temperature service |
| Suitable for Furnaces / Ovens | ❌ Not recommended | ✔ Ideal |
| Explosion-Proof Options | Limited | Available in explosion-proof, non-explosion-proof, and high-pressure models |
The Bottom Line
Standard airflow switches are designed for moderate conditions and often fail when exposed to sustained high temperatures. PEECO High-Temperature Duct-Mounted Flow Switches are engineered from the ground up to handle extreme thermal environments—providing reliable airflow verification, longer service life, and reduced maintenance in applications where failure is not an option.