The MI-PTSE multi sensor combines optical smoke detection, heat detection and microprocessor control with analogue addressable communications. For smoke detection the MI-PTSE incorporates an improved sensing chamber design, linked to sophisticated processing circuitry with smoothing filters. This helps to eliminate the transient environmental noise conditions which can be the cause of false alarms. The sensor's performance is further enhanced by the integration of special algorithms which automatically compensate for contamination of the sensing chamber. This enables the sensor to provide a consistent level of sensitivity and increased immunity to unwanted alarms. In combined modes of operation both the inputs from the optical and thermal sensors are processed using special algorithms before an alarm decision is made. If the presence of smoke is detected above a threshold value for a period of time, or if the heat sensor detects temperatures above 58°C then an alarm condition will be generated. In "heat only" mode only temperatures above 58°C will generate an alarm condition.

• Optical and thermal sensors • Microprocessor controlled with internal algorithms • Enhanced signal processing for improved stability • High immunity to unwanted alarms • 2 autolearn sensitivity settings • 3 fixed sensitivity photo thermal settings • Thermal only detection mode • Twin LEDs for 360° visibility • Built-in test • Third party certified to CEA 4021, EN54-7:2000 and EN54-5:2000

mechanical Dimensions: Weight: 115g Colour: Pantone warm grey 1C Material: Bayblend FR110 Terminal wire guage: 2.5mm2 max. Operating temperature: -20°C to +60°C Relative humidity: 10% to 93%(noncondensing) electrical Voltage: +15 to +32Vdc Standby current: No communication: 250μA @ 24Vdc maximum One communication every 5 seconds, LED blink: 300μA @ 24Vdc maximum Alarm current: 7mA @ 24Vdc maximum Sensitivity modes 1 High (1%/ft) 2 Medium to high - auto adjusting (1-2%/ft) 3 Medium (2%/ft) 4 Low to Medium - auto adjusting (2-3%/ft) 5 Low (3.5%/ft) 6 Thermal only - Class A1R (58°C)