MI-LZR High Sensitivity Smoke Sensor

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Enhanced 3 year warranty applicable when commissioned by Fitzgerald Service.

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Features

Extremely high sensitivity LASER based smoke sensor.

Superior early warning performance.

Effective response to both fast flaming and slow smouldering fires.

Stable communication with high noise immunity.

9 sensitivity levels (0.07 - 6.56%/m).

Twin LEDs for 360° visibility.

Built-in test.

Third party tested to EN54-7:2000.

The MI-LZR high sensitivity LASER based intelligent smoke sensor provides an extremely high sensitivity to fire conditions, by detecting the earliest particles of combustion. This is achieved by combining a patented optical chamber, the latest in LASER diode and precision optical technology. This combination enhances the sensitivity of the device. Sophisticated processing circuitry and smoothing filters help eliminate the effects of transient environmental noise, which can be the cause of unwanted alarms.

The result is a very sensitive and stable sensor able to achieve sensitivities of 0.07 % to 6.56% per metre obscuration - up to 100 times more sensitive than a standard photoelectric smoke sensor. Historically, photoelectric smoke sensors have shown a quick response to slow smouldering fires, whilst ionisation smoke sensors have responded quicker to fast flaming fires. The MI-LZR provides a good response to both types of fire by improving the signal to noise ratio. The use of a LASER enables detection of small particles (usually associated with fast flaming fires), that are not as easily detected by a standard photoelectric smoke sensor.

A quick response and pin point accuracy makes the MI-LZR especially suitable for environmental applications where there is substantial cost for down time or a significant investment in installed equipment has been made. Typical installations are Electronics manufacturers clean rooms, telecommunication rooms and computer rooms.

Mechanical

Material	Bayblend FR110

Weight	142g
Colour	Pantone warm grey 1C
Operating temperature	-10°C to +55°C
Relative humidity	10% to 93% (non-condensing)
Terminal wire gauge	2.5mm2 max

Dimensions

Dimensions

Electrical

Voltage	+15 to +32Vdc

Standby current	No communication - 250µA @ 24Vdc max
	One communication every 5 seconds
	LED blink: 300µA @ 24Vdc maximum
	Alarm current: 6.5mA @ 24Vdc maximum
Sensitivity modes	1 - 0.07 %/m
	2 - 0.10 %/m
	3 - 0.16 %/m
	4 - 0.33 %/m
	5 - 0.66 %/m
	6 - 1.65 %/m
	7 - 3.24 %/m*
	8 - 4.85 %/m*
	9 - 6.41 %/m*
	* Sensitivity levels covered by EN54-7:2000 42 mm 102 mm diameter

Part Numbers

F850861	High sensitivity LASER smoke sensor. (MI-LZR)

Accessories
F850725	Detector sensitivity test tool. Use with most analogue or digital multimeters. (MOD400R)
F850726	Surface mounting kit provides for entry of surface wiring conduit. For use with B501 base only. (SMK400)
F850727	Recess mounting kit. For use with B501 only. B501 Detector mounting base. (RMK400)
F850877	Detector mounting base fitted with loop isolator. (B501IEFT)
Note	The MI-LZR is compatible with B500 series bases and other sensors and modules

Wiring

Wiring diagram