Honeywell FSP-851G

I³™ Series Smoke Detector with Isolated Thermal Sensor, Sounder, Relay

MPN: FSP-851G
Category: Honeywell Fire Detectors & Manual Call Points

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12-month warranty (new) · 3-month (used/refurbished)
30-day returns, no restocking fee on unused parts
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What is the Honeywell FSP-851G?

Throughout the i³ Series, installation is simple with its installer-friendly base and plug-in design. The base accommodates a broad range of back box and direct mounting options and provides ample space for pre-wiring the device. To complete the installation, the i³ detectors plug into its base with a simple Stop-Drop ’N Lock action.

To reduce the likelihood of nuisance alarms, all i³ detectors are equipped with both drift compensation and smoothing algorithms. These capabilities minimize both short- and long-term causes of nuisance alarms, such as RF interference and dust accumulation.When connected to the 2W-MOD2 loop test/maintenance module or an i3 Ready™ panel, 2‑wire i3 detectors can generate a remote maintenance signal when in a maintenance or freeze trouble condition. To measure the sensitivity of any i³ detector, the SENS-RDR displays the reading, in terms of percent-per-foot obscuration, within seconds.

i³ detectors have red and green LEDs to simplify local status indication during power-up, standby, alarm, maintenance, and freeze trouble conditions. If connected to the RRS-MOD reversing relay/synchronization module, all i³ sounders on the loop will activate when one detector is in alarm. The RRS-MOD also synchronizes i³ sounder output to ensure a clear audible signal.

Should the application call for differentiating between a local and a general alarm, the isolated thermal model initiates a local alarm when smoke is detected and a general alarm when the thermal sensor is activated.Features & Benefits:

85 dB sounder

Form C relay

Isolated thermal sensor

Plug-in design (base included)

In-line terminals

Flexible mounting options

Stop-Drop ’N Lock™ attachment to the base

Removable cover and chamber

Remote maintenance signaling

Drift compensation and smoothing algorithms

Simplified sensitivity measurement

Dual-color LEDsCertifications:

UL Listed S911

FM Approved 3015195

CSFM Listing 7272-1653:164

MEA Approved 372-02-E

MSFM Approved 2133

ETL Listed 3180932

C2WTA-BA: ULC Listed

C2WTR-BA: ULC Listed

C4WT-BA: ULC Listed

C4WTA-BA: ULC Listed

C4WTR-BA: ULC Listed

C4WTAR-BA: ULC Listed

C4WITAR-BA: ULC Listed

Honeywell Farenhyt, NOTIFIER, System Sensor FSP-851G — i³™ Series smoke detectors with isolated thermal sensors, sounders, and relays apply the guiding principles of installation ease, intelligence, and instant inspection. PartnerPLC sources new, surplus and discontinued Honeywell parts — request a quote for price, condition and lead time.

Specifications

Product

Lifecycle	Active
Brand line	Farenhyt, NOTIFIER, System Sensor

Others

Brand	Farenhyt, NOTIFIER, System Sensor
Detection Sensor Type	Photoelectric

Ordering codes

Part numbers on this product page

FSP-851G, HD100SD, JTY-GD-882, JTY-GD-NP3251ISO

FSP-851G: frequently asked questions

When can FSP-851G be shipped?

FSP-851G 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 FSP-851G 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 FSP-851G 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 FSP-851G, subject to availability and destination.