Demco Ionization Smoke Detector

Demco Ionization Smoke Detector

Demco Ionization Smoke Detector

Rp 000

Demco Ionization Smoke Detector The sensing part of the detector consists of two chambers - an open outer chamber and a semi-sealed reference chamber within. Mounted in the reference chamber is a low activity radioactive foil of Americium 241 which enables current to flow between the inner and outer chambers when the detector is powered up. As smoke enters the detector, it causes a reduction of the current flow in the outer chamber and hence an increase in voltage measured at the junction between the two chambers. The voltage increase is monitored by the electronic circuitry which triggers the detector into the alarm state at a preset threshold. An externally visible red LED lights up when in alarm. IP rating = IP23D ADVANTAGES • Features: Flashing LED; Alarm indication: Red LED; Supply voltage: 9 to 33V • Average stand-by current at 24V: 45uA; Average stand-by current at 9V: 21uA • Alarm current at 24V: 52mA; Alarm current at 9V: 17mA • Ambient temperature: 32 to 158°F; Max wind continuous: 2,000ft/min • Remote output (R-) characteristics: Current sink to -ve line, limited to 17mA. Note: when using a remote indicator a current-limiting series resistor may be required.

Smoke Detector Demco D-213

Smoke Detector Demco D-213

Smoke Detector Demco D-213

Rp 000

Smoke Detector Demco D-213 DEMCO Photoelectric Smoke Detector D-213 with its new sensor design incorporates an internal pulsing LED and a photo-diode at an obtuse angle, is ideal for applications where slow-burning or smouldering fires are likely. The D-213 has an advanced solid-state, low-voltage, surface-mount circuitry and are designed for 2-Wire installation using the D3X001 universal base. The detector head is installed into the base with a simple twist-lock action. The 360-degree detector design permits smoke entry from any direction, and a unique sensing chamber that permits operation in open areas with air velocities from 0 to 300 fpm. A fine wire mesh extending between offset ports in the exterior and interior walls screens insects from the chamber and obstructs light from passing directly to the interior part. ADVANTAGES • Certification/Listing-UL, CE and BSI. • Advanced detection and discrimination algorithms. • Advanced solid-state, low-voltage, surface-mount circuitry. • Suitable for the majority of application conditions. • Easy installation, testing and maintenance. • Sleek low-profile housing design. • Flashing LED in standby mode. • Robust and reliable sensor head. • Two red LEDs to allow 360-degree viewing. • A fine mesh insect screen protects the chamber area i.e. to avoid potential nuisance alarms. • Optional/integrated heat detector for D213-2H and D213-2HL models. UNIVERSAL BASE The D3X001 universal base is designed for the D-113 and D-213 series of detectors. It is an electronics free base with a simple and robust design that enables a detector to be plugged in without any need for force – particularly useful when installing to suspended ceiling. Being a common base, it allows detector interchange within the series.