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Available on request

Honeywell – D4S InnovairFlex™ D4S 4-Wire Photoelectric Sensor

MPN: D4S · Brand: Honeywell

Price on request

Discontinued by Honeywell — we can still source the original D4S (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 D4S now that it is discontinued?

Yes. Honeywell has discontinued the D4S, 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 D4S be shipped?

D4S 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 D4S 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 D4S 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 D4S, subject to availability and destination.

The InnovairFlex D4120 4-wire photoelectric duct smoke detector features 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 feet per minute, temperatures of –4°F to 158°F, and a humidity range of 0 to 95 percent (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 housing provides ample wiring space, a ¾-inch conduit knockout, and built-in short circuit protection to prevent damage to sensitive components during installation. High contrast terminal designations make wiring easy. With its 2:1 sensor-to-power capability, the power board of the D4120 may be used to monitor a second sensor, D4S, simultaneously (i.e., supply and return side). As many as 50 InnovairFlex detectors can be interconnected. When one unit senses smoke, all interconnected detectors will switch their relays; only the detector sensing smoke will go into alarm, thus pinpointing the fire source.

Features & Benefits:

4-Wire Photoelectric, integrated low-flow technology

Air velocity rating from 100 ft/min to 4,000 ft/min (0.5 m/s to 20.32 m/sec)

Versatile mounting options: square or rectangular configuration

Plug-in sensor offers superb false alarm immunity and the latest sensor technology

Broad ranges for operating temperature (–4°F to 158°F) and humidity (0% to 95% non-condensing)

Rotary address switches

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

Increased wiring space with a newly added ¾-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

24 VAC/DC or 120 VAC

Backward compatibility with existing Innovair products, including remote accessories

Certifications:

UL S911

FM 3033744

CSFM 3242-1653:0207

Honeywell Farenhyt, Gamewell-FCI, NOTIFIER D4S — The InnovairFlex™ Series are the only duct smoke detectors flexible enough to fit configurations from square to rectangular and everything in between. 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.