New to this catalogue are a number of luminaires with the option of an integral micro-wave sensor.

In the past, integral sensors in luminaires have been passive-infra-red, typically with one PIR per luminaire.

The main features of micro-wave technology when compared with PIR technology are:

• Micro-wave devices can operate from behind a solid object, so they can be mounted inside a luminaire, behind the diffuser.

• They have a longer detection range / wider detection area than a PIR.

In addition, our luminaires with integral micro-wave sensors are wired for master/slave operation, with an optional manual switch over-ride. Taking a long corridor as an example, this means that most of the luminaires could be normal (or slave) type, with master luminaires (equipped with integral micro-wave sensor) only being required at each end and, if desired, with one in the middle. A person approaching from either direction would cause the lights to switch on, but this could be over-ridden from a manual switch if desired. Each micro-wave sensor has a high-inrush relay and can switch 10A of incandescent or fluorescent load.

The ambient light-level threshold at which the lights switch on, and the time delay before the lights are switched off once no movement is detected are both adjustable.

The benefits of this are:

• The luminaires look better. PIRs mounted in a luminaire can be very unsightly. Our micro-wave sensors are mounted in the fitting, behind the diffuser, and so the good looks of the luminaire are not compromised and all the luminaires in an installation look the same.

• The luminaires retain their IP rating. Traditionally it has not been possible to offer an IP65 rated luminaire with an integral PIR sensor. With the advent of a micro-wave sensor mounted behind the diffuser it is now possible to offer integral energy saving controls in harsh environments because an IP65 rating can be maintained.

• Lower acquisition cost. Because our micro-wave sensors have a wider detection area than a traditional PIR sensor, fewer of them are required. This reduces overall costs.

• Lower installation costs. Unless an installation is being completed with marshalling boxes and modular wired luminaires and sensors, luminaires with integral sensors are quicker to install than standard luminaires with separate sensors.

• Improved lit environment. The wide detection area of the micro-wave and its 10A switching capacity mean that lights can be controlled in larger groups, giving a more uniform light-level. The alternative with PIR sensors is often pools of light surrounded by wide areas of darkness.

• Lower energy bills and closer compliance to building regulations. Circulation area are often excluded from lighting control projects due to the lack of suitable, integral sensors. Now, fittings are available that are suited to harsh environments and circulation areas that have integral sensors.

Initially, the fittings we are offering with integral micro-wave sensors are:

Jupiter - An IP65 rated luminaire with black base and clear prismatic diffuser, ideal for many situations both internal and external. See index.

Municipal - Designed to meet the stringent requirements of educational establishments & health care applications whilst retaining a stylish appearance. See index.

Nimbus - The Nimbus is a simple but stylish surface mounted circular luminaire, providing both direct lighting and a diffused up-light via a "halo" ring. See index.

Purlieus - A linear vandal resistant IP65 surface mounted fitting ideal for internal and external applications, particularly in onerous environments prone to vandalism. See index.

In addition to the control products listed on the preceding pages we can also offer a range of Tridonic products on a project by project basis. These include Tridonic's DSI-SMART, smartDIM and smartSWITCH.

Please consult your local Fitzgerald sales engineer for details.