The A-22D-A03 is a Belimo duct mounting flange for 6 mm probe-style temperature sensors. The plastic flange holds the cable probe securely in a sheet-metal duct wall with two surface-mount screws, providing a clean exterior penetration and a friction-locking probe grip that maintains alignment over the life of the installation. Rated for continuous exposure up to 120°C [248°F] for general HVAC duct air applications.
Designed for the Belimo 01CT, 22DC, 22DT, 22DTH, 22DTM, and any other Belimo cable or duct sensor with a 6 mm (0.24") probe diameter. Standard choice for typical HVAC duct air installations (chilled water coil leaving air, supply air, return air, mixed air).
Key Features
Mounts to sheet-metal duct walls with two #8 self-tapping screws (not included; use installer-supplied screws sized to duct gauge). The mounting holes are on a 50 mm (1.97") center-to-center spacing. Footprint: 69.6 mm (2.74") long × 46 mm (1.81") wide.
The center bore accepts the 6 mm probe and grips it with a captured fastener that you tighten after inserting the probe to the desired depth. The grip maintains probe position against duct vibration without crushing the probe sheath. Probe can be repositioned or removed for service without removing the flange from the duct.
Plastic body rated for continuous exposure up to 120°C [248°F]. Standard duct air temperatures fall well within this envelope; the polymer construction also resists corrosion in humid duct environments.
Technical Specifications
| Specification | Detail |
|---|---|
| Type | Duct mounting flange for 6 mm probe sensors |
| Material | Plastic |
| Maximum Temperature | 120°C [248°F] |
| Probe Diameter | 6 mm (0.24") |
| Mounting Hole Spacing | 50 mm (1.97") center-to-center |
| Flange Footprint | 69.6 mm × 46 mm (2.74" × 1.81") |
| Mounting Hole Diameter | 4 mm (0.16") |
| Probe Bore Diameter | 6.3 mm (0.24") |
| Mounting Method | Surface-mount via 2 screws (screws not included) |
| Manufacturer | Belimo |
| Manufacturer Part Number | A-22D-A03 |
| Warranty | 5-year factory warranty |
Documentation
Frequently Asked Questions
What sensors is the A-22D-A03 compatible with?
All Belimo cable or duct temperature sensors with a 6 mm (0.24") probe diameter — the 01CT family, 22DC, 22DT, 22DTH, 22DTM, and others. Belimo standardizes on 6 mm probes across these lines so the same flange works for all.
How is it mounted to the duct?
Two surface-mount holes on 50 mm (1.97") centers — use installer-supplied self-tapping screws sized to your duct gauge (typically #8). Drill a clearance hole for the probe (about 7 mm / 9/32") in the center of the mounting pattern, insert the probe through the flange and into the duct, then tighten the captured fastener at the flange center to grip the probe.
Why choose the plastic flange?
Choose the plastic A-22D-A03 (this SKU) for standard HVAC duct air applications — it covers everything up to 120°C (248°F), which is well above any HVAC duct air temperature, and the polymer construction is lower cost and corrosion-resistant in humid environments. Choose the brass A-22D-A05 for process exhaust, industrial drying, or any duct where temperatures could exceed 120°C.
- Sensor Type:
- Duct Mounting Flange
- Compatible Probe:
- 6 mm (0.24)"
- Material:
- Plastic
- Max Temperature:
- 120°C [248°F]
- Mounting Method:
- Surface-mount, 2 screws
- Mounting Hole Spacing:
- 50 mm (1.97) c-to-c"
- Footprint:
- 69.6 mm x 46 mm
- Compatible Sensors:
- 01CT / 22DC / 22DT / 22DTH / 22DTM (6mm probe)
