Thermal Flow SwitchesSeries DTFF Duct Thermal Flow/No-Flow Switch
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Series DTFF
Series DTFF Duct Thermal Flow/No-Flow Switch
Duct-mount thermal flow/no-flow switch for HVAC air handling applications. Detects air flow presence in ducts without moving parts. Adjustable trip point with LED status indication.
Key Features
- Duct-mount design for HVAC air systems
- No moving parts — thermal sensing principle
- Adjustable trip point
- LED flow/no-flow status indication
- SPDT relay output
- Easy duct installation via 1/2" NPT fitting
Specifications
OutputSPDT relay
SensingThermal dispersion
MountDuct insertion, 1/2" NPT
SetpointField adjustable
IndicationLED (flow / no-flow)
Supply Voltage24 VAC/VDC
Switch Rating5A @ 120/240 VAC
Typical Applications
- HVAC fan proving
- Air handling unit monitoring
- Duct air flow detection
- Ventilation system control
- Filter change indication
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