Hochiki ESP Addressable Optical Smoke Detector (Ivory Case) (ALN-EN)

The Hochiki ALN-EN is an addressable optical smoke detector for Hochiki ESP fire alarm systems, with a removable High Performance Chamber that helps reduce false alarms.

See all Hochiki smoke detectors: ESP addressable, CDX conventional, multi-sensor and specialist models, with a guide to bases and panel compatibility.

The Hochiki ALN-EN is an intelligent photoelectric (optical) smoke sensor in an ivory case, fully compatible with Hochiki's ESP analogue addressable protocol. It uses Hochiki's High Performance Chamber, which allows the alarm threshold to be raised, improving the signal-to-noise ratio and reducing susceptibility to false alarms, and removes the need for ionisation smoke sensors in most applications.

Key features

• Removable High Performance Chamber for easy cleaning or replacement
• Improved baffle design lets smoke in while keeping ambient light out
• Twin LEDs for 360° viewing - green when polling, red in fire
• Locking mechanism (sensor to base)
• Variable sensitivity
• Electronically addressed (e.g. with the TCH-B200 hand-held programmer)
• Pulsing/non-pulsing LED controlled from the panel (panel compatibility required)
• Approved by LPCB and VdS

Technical specifications

• Protocol: Hochiki ESP (digital communications)
• Operating voltage: 17-41 V DC
• Low power mode current (typ.): 120 µA
• Quiescent current (typ.): 400 µA
• Alarm current (controlled by panel): 9.1 mA, excluding remote indicator
• Operating temperature: -10°C to +50°C
• Operating humidity: 95% RH non-condensing (at 40°C)
• Storage temperature: -30°C to +60°C
• Case: ivory ABS
• Dimensions: 100 mm diameter x 45 mm high
• Weight: 95 g
• Compatible bases: YBN-R/3, YBN-R/3(SCI), YBO-R/SCI, YBO-BS, YBO-BSB
• Base fixing centres: 48-74 mm
• Approvals: LPCB and VdS

Used for: Hochiki ESP analogue addressable systems. Pair with the Hochiki YBO-BS base sounder where a sounder base is needed.