Availability
Mfr. part #: FDT421
Available to orderCall or email us for the lead time
Delivery across Canada in 2 to 4 business daysFree shipping on orders over $250 CAD
Buying for a project or in bulk?Request a volume quote
Genuine stockBrand new, factory sealed
1 year warrantyOn every product
30 day returnsSee our return policy
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Need help with this part?Call +1 909 235-5810 or email info@jemsystems.ca
Frequently bought together
The Siemens FDT421 is an intelligent addressable thermal detector that uses a thermistor and microprocessor so the panel reads temperature continuously, with seven field-selectable parameter sets.
- Fixed set points 135, 145, 155, 165 and 175°F plus two rate-of-rise sets
- Optional 40°F low-temperature warning
- UL 521 and ULC listed; mounts on DB-11 or DB-11E bases
| Brand | Siemens |
|---|---|
| Manufacturer part number | FDT421 |
| Product type | Heat Detectors |
| Shipping weight | 0.5 lb |
| Condition | Brand new, factory sealed |
| Warranty | 1 year |
| Currency | Canadian dollars (CAD) |
Need a manual, listing or cut sheet that is not here? Email info@jemsystems.ca with the part number.
- Delivery across Canada in 2 to 4 business days.
- Free shipping on orders over $250 CAD.
- Returns within 30 days of the invoice date for unused items in original packaging, with an RMA number. Restocking fees may apply. See our refund policy.
- 1 year warranty on all products.
- Questions about an order? Email customerservicegroup@jemsystems.ca or call +1 909 235-5810.

