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Chaps, I have an internal garage which has a 225mm thick (2x 100mm thermalite block with a tiny air gap + plaster on one side) wall separting it from the hall way in the house. Due to a wonderful piece of 1980s design the front door is currently is in a bit of a rubbish place. I would like to...

I went with the AICO units with a relay module connected to a zone on the alarm in the end and I'm happy with it. I get texts when the smokes go off, I don't know which one caused the alarm but thats not really a worry. I like having the two systems separated for the reasons above.

I have a COMIP connected to my premier elite 48, using it I can connect to the panel from Wintex and the android app and everything is reliable. The module is connected to COM2, the problem I have is that it only seems to work if I leave the port configuration for COM2 as not used. Setting the...

I have the stairs, kitchen and lounge at one end of my hallway and the front door is at the other end. What would then ideal placement be for the smoke detector? Half way along the hall or nearer the end with all the rooms attached? I guess the latter but this would mean the alarm would be just...

http://www.conformance.co.uk/info/technicalfile.php not obliged to provide to joe bloggs but some do. If you look at various hook up wire specs a fair few will pass a 3kV HiPot.

http://slideplayer.com/slide/5885546/ may be worth a flick through as it explains some of the requirements it should be tested against. To be class II it doesn't have to be double insulated. The wire could be single insulated but providing a level of insulation classed as "reinforced...

I found that all the double and tripple light switch metal back boxes in a relatives 2007 mass built estate house were not earthed. The earth cables were present but terminated into a nylon choc block with no link to the actual back box. This only came to light when someone got a "tingle" off...

Thanks chaps. I already have flow sensors with PT1000 sensors embedded in them on this project so this valve will be in the control loop :o)

Thanks Bernard, I had seen some graphs, we will just put a map in our firmware to linearise things. If we look at something like a ESBE ARA659: http://www.plumbcenter.co.uk/product/esbe-ara659-actuator-property-24vac-dc-50hz/ it mentions one of the properties is a variable run time setting...

Thanks chaps it has given me some more magic terms to google. One of these: http://www.heatingcontrolsonline.co.uk/mixing-valve-actuator-24v-proportional.html And one of these: http://www.heatingcontrolsonline.co.uk/mixing-valve-body.html Gets me pretty close, juat need a bit more data on...

0-10V is very doable, got any info? Dan, would be a rotary encoder and a dc motor?

Thanks Dan What sort of drive would it likely be?

Water <80deg C <150l/m If there is something which is a lower spec it would still be handy to have details as I may be able to limit my test to suit.

Why not? :D Its for a test rig that I'm building for a piece of equipment that I have designed so that I don't have to pay a chap to sit there and adjust a couple of manual valves during extended life testing.

Do any of you chaps know of a (ideally 22mm) 3 port valve which is stepper motor controlled? I'd need a cold input and hot input and a blended output with the mixture set by the position of the stepper motor.

I've been considering adding 6 Menvier M12 smoke / heat detectors to my existing intruder alarm system. These would cover Garage, Kitchen, Hall, Lounge, Landing and Loft space. Would this be the best way to go or would using mains interconnected alarms be a better bet? If so are there any...

If you want to buy a copy you can get it from estonian standards www.evs.ee for sub 10 euro....

We use these for doing the same thing in a slightly different application and they work very well. You just need to integrate them with a micro and an enclosure.... https://na.industrial.panasonic.com/products/sensors/sensors-automotive-industrial-applications/grid-eye-infrared-array-sensor

I have an integral garage that is about 100mm wider that the up and over door that makes up one end of it. At the moment there is contact on the door and a PIR in the corner pointing across the up and over door and along one of walls. When opening the up and over door it hides the PIR sensor...

You have to get into the compliamce mindset.... as far as en60950 is concerned there are only different installation (overvoltge) categories defined. If your building fixed equipment it has to be tied to something and they use the term building for that. They couldnt give a monkeys if its a...