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

The Hochiki ALN-EN(WHT) is an intelligent photoelectric (optical) smoke sensor in a white 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.

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

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: white 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