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Available on request

Honeywell – D4120 InnovairFlex™ 4-Wire Duct Smoke Detector

Name: Honeywell – D4120 InnovairFlex™ 4-Wire Duct Smoke Detector
Brand: Honeywell
SKU: D4120

MPN: D4120 · Brand: Honeywell

Price on request

Discontinued by Honeywell — we can still source the original D4120 (new, used or refurbished, subject to availability). Request a quote below.

Request a Quote

12-month warranty (new) · 3-month (used/refurbished)

30-day returns, no restocking fee on unused parts

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Quick facts

Availability	Confirmed on request
Category	Honeywell Fire Detectors & Manual Call Points
Lifecycle	Discontinued
Warranty	12-month (new) · 3-month (used/refurbished)

Shipping & availability

Can I still buy the D4120 now that it is discontinued?

Yes. Honeywell has discontinued the D4120, but sourcing discontinued parts is what PartnerPLC specialises in — new old stock, used and refurbished units. Request a quote and we'll confirm availability, condition and lead time.

When can D4120 be shipped?

D4120 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up D4120 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for D4120 and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for D4120, subject to availability and destination.

InnovairFlex™ D4120 4-wire photoelectric duct smoke detectors feature a pivoting housing that fits both square and rectangular footprints and mounts to round or rectangular ductwork. This unit senses smoke in the most challenging conditions, operating in airflow speeds of 100 to 4,000 ft/min, temperatures of –4 °F to 158 °F, and a humidity range of 0 to 95% non-condensing. A plug-in sensor head offers improved false alarm immunity and simple installation, testing, and maintenance. An improved cover design isolates the sensor head from the low-flow feature for simple maintenance.The InnovairFlex D4120W watertight 4-wire photoelectric duct smoke detector is UL listed as a watertight enclosure providing protection against falling dirt, rain, windblown dust, splashing and hose directed water.

Features & Benefits:

Patented sampling tube installs from front or back of the detector with no tools required

Increased wiring space with a newly added 3/4 inch conduit knockout

One easy-access Test/Reset button and improved LED status

Patented interconnect feature for multi-fan shutdown

New high contrast terminal designations

Built-in short circuit protection from operator wiring errors

Field selectable settings for configuring the detector

Two DPDT Form C relay contacts

24V AC/DC or 120V AC

Backward compatibility with existing Innovair products, including remote accessories

Certifications:

UL/ULC

CSFM

Honeywell Farenhyt, Gamewell-FCI, NOTIFIER D4120 — InnovairFlex™ 4-wire photoelectric duct smoke detectors offer 2 sensors to 1 powerboard capability in standard (D4120) and watertight (D4120W) versions. Discontinued by Honeywell — no longer in the current range. PartnerPLC sources new, surplus and discontinued Honeywell parts — request a quote for price, condition and lead time.