Nice to see the standards are kept. 

I’m going to speak to the customer tomorrow morning. HKC I think.

Those were very popular racal Apollo and I like their bright LEDs that do the double wink.

@richardwilson2447 I’ve been on call 24/7 since 1980 and I’ve had my share of faults on these older detectors. If feel hope for the next generation of engineers because they won’t have the same false alarm rate as the old days. Quality is improving, my Callout and false alarm rate is 0.01% and has been for a few years. False alarm’s these days are usually subscriber related.