NB 338 4H

NB 338 4H is a 4-wire optical smoke detector with an integrated heat sensing element. The combination of optical and thermal detection provides broader fire recognition, improved accuracy and reduced false alarm probability.

Main Features

• Dual detection technology: optical smoke and heat sensing in a single unit.
• 4-wire connection offering extended integration options.
• Reliable response to both slow-smoldering and fast-developing fires.
• Enhanced resistance to dust, airflow disturbances and environmental noise.
• Built-in LED for operational status indication.
• Compact, low-profile design suitable for multiple indoor environments.

Applications

This model is used in areas requiring combined smoke and temperature monitoring: office buildings, storage rooms, public spaces, residential complexes, commercial facilities and industrial zones.

Technical Summary

• Detection type: optical smoke + heat sensing.
• Connection: 4-wire system.
• Mounting: ceiling installation with a compatible base.