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Dual-Tec PIR's - getting insensitive on walk test


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Hi,

I have a couple of Pyronix Equinox E dual tec PIR's that have been great; however I'm now finding that they are becoming less sensitive during walk test (but no false alarms though).  In fairness they're 20+ years old....

Is such behaviour the norm, and if so I've been looking at Pyronix KX15DT's - are these a worthy replacement?

One last question - the Equinox E states a relay contact via a 4.7 ohm series resistor, yet the KX15DT incorporates selectable alarm resistor values of 6K8, 5K6, 4K7 &1K & tamper values of 5K6, 4K7, 2K2 and 1K.  So what should I select? My panel tech spec. quotes a "Zone Activation Resistance" of 2Kohms (minimum)" if that's of help.

 

Many thanks in advance

polybear01

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I have known older Pyronix sensors to decrease there coverage with age so it is a good idea to consider upgrading.

I imagine most DT's would be suitable replacements. If your panel in double pole you are likely not to need selecting of any resistance and wire like for like.

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2 minutes ago, polybear01 said:

"Normally closed loops which activate when opened or connected to 0 volts from dc power supply" - nothing about double pole though?

 

same  thing

9 minutes ago, sixwheeledbeast said:

sensors to decrease there coverage with age

 

I assume the range has pot on it?

 

Adjusting pot min to max a dozen times will probably see it right ?

Mr? Veritas God

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