Yeah put a dual tech in a conservatory so it can look straight through the glass, nice one! 

detectors should never be used for entry exit, this should be carried out using reed switches.

What is the point of installing a system without monitoring or service contract?

Good conservatory detectors optex fx50sq or aritech dd325

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Sorry if I'm sounding a bit 'dumb' but I have no knowledge of 'reed switches' and having looked at one on the net they appear quite daunting for a novice.

I have a basic passive as an exit/entry in our kitchen that has served us without a hitch for the past 9yrs and the system that is the same age (now I'm pushing my luck) has never been serviced. banghead

I didn't realise you could use pet immune PIR's as exit/entry, thanks for that.

I have noticed on some sites there are passives called 'kitchen/conservatory PIR's' what are these about?

Sorry for all the questions, Roy

Plus dual-techs are used all the time in conservatories!! - if adjusted properly they will cope fine! - some people talk cack on here.

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A standard PIR will false alarm in a conservatory, due to extreme heat and sometimes direct sunlight.

A dualtech sensor has a microwave sensor in addition to the PIR. The microwave will not be affected by the heat or sunlight. The microwave and PIR have to activate for the detector to send an alarm condition.

The microwave sensor can see through glass, though, so careful adjustment is needed to prevent this.

Hope this has cleared it up for you