13:38 The sweet sound of fire drills

There are loads of bells in the UK, in fact every school I've been to used bells as a fire alarm signal

Thanks fore testing the difference between 10-24 and 439D-AWC

Hands down, without a doubt the 439D gets my vote. It is not only louder but has a far better sound compared to the motorized MB-24s. A little history on the 2 bells: The 439D first began it's life in Canada in the 1950's under the Adaptabel name. Then in around 1969 "Edwards of Canada" (based in Owen Sound Ont) began using the "Durabel" name for it's continuous vibrating bells only. The adaptabel name was only used on the special application/single stroke bells thereafter. In 1984 Edwards of Canada renamed and rebranded the Durabel under The 439D ident and shortly after outsourced it's product line to it's parent Company located in Norwalk Connecticut (Edwards USA) In 2001 Edwards began phasing out it's higher quality 439D line to the cheaper and lower quality MB-24s which were then made in China by what was then "Amseco" but is now owned by Potter Signal Corporation. Potter now makes bells for Edwards as well as a number of other manufacturers (Mircom Siemens, Notifier) The 439D bells were available for a few more years in Canada but have since been succeeded by The MB-24 and are generally only used for replacements in existing bell based systems and are rarely featured in new systems today (with electronic signals now taking their place) There my friend; is the history of the Edwards Fire bell in Canada.

My old school had a Edward’s fire bell.

I grew up with bells and electro-mechanical horns. My kindergarten classroom had a Simplex 6 inch bell and hallway had Simplex 10 inch, all on Simplex 4080 light plates. Well, pre-k was a Wheelock 34T on a Simplex 4080 light plate. School bells from K-5th grade were 10 inch gongs. From first through fifth grade had Wheelock 7002T and 7001T. Replaced with System Sensor spect alerts. Middle school had GS-895B-201...I think and 270SPO pull stations. Replaced with Wheelock NS. No clue what the pull stations are now. High school had 10 inch grey bells for burglary and single stroke bells and vibrating bells were used for class change in high school. Pull stations in elementary school, daycare, and high school were BG-10...all replaced with BG-12. They were like music! I went back to visit my high school after I graduated and ALL of the bells were all gone! Class change bells were converted to P.A. bells (a pre-recorded tone would play over the P.A. system) and the burglar alarm system was converted to a silent alarm. And, my elementary school was converted to P.A. bells and System Sensor specter alert classics horn/strobes. I miss the old electro-mechanical horns and bells that I grew up with. Today's alarms are just simply awful.

In the first test you did, I noticed that after the bell stopped ringing it took a while for your camera to readjust its automatic level control, so the loud sound of the bell must have caused the ALC to pump way down.

yay fire bells! I love these videos!! Thanks Nic!

Sound difference levels of the MB-10 and the 439D at 10 feet and in the room MB-10: 27.9 439D: 20.7 So it appears that the sound of the 439D dropped by 20.7 decibels when it was in the room because the sound that it makes is more cleaner than the MB-10 espically on Filtered DC making the sound more better at traveling through walls than the System Sensor P2R In the last video. But the reason why the 439D's sound difference levels came up as the same as the MB-10 in the last video because in this video the MB-10 was tested in the room where the couch is and in the last video it was tested on a demo board touching the bathroom door because distance can affect sound pressure loss which must be why the MB-10 in the room dropped by 27.9 dB instead of 20.7 dB (7.2 difference) and I'm thinking if the System Sensor P2R was tested in this exact same spot then it will drop by 22.7 dB because it's farther away from the spot in the last test making the sound pressure level drop a lot more from this difference. Here's how these signals are ranked on sound penetration #3: MB 10-24 #2: System Sensor P2R #1: 439D

Cool. Keep up the good content.

Me getting so happy to get the notification if a ne video that u posted

Personally I think the 439D series was the best product Edwards ever made. Durable, reliable, and sound really great.

my schools have both of those same bells installed

Where I am in Canada we have way more simplex bells. Next try the simplex and the 10-24.

My school has the 439D series with simplexes and a few G.S. Alarms. I hear them a lot bc people pull fire alarms

Good job , keep up the good work

It’s the notifier bells the same?

Nic does the fire lite ms-2 have a FACP on it and what? Is it but anyways love your videos can’t wait to see that new room u did in your monthly test

Motor bells are more "fire-alarmy", while solenoid-driven bells sounds like class changing bells in schools. Just my personal view(

Can you put a Vibrating bell on a motor bell box and vice versa

Maybe notifier made a better bell?

I think the notifier KMS-10-24A is the same

Cool video

I don’t understand the crisp clear temporal 3 it sounds fine at my school but it’s notifier not edwards

why the bright in this video so high

NIC'S - forgive my lack of knowledge, but why would you need an end of line resistor? Wouldn't it just be a loop system of positive-negative?

How does a vibrating bell work vs motor bell?

Are bells cheaper?

What's the difference between a motor bell and a vibrating bell?

10-24 and 439D-AWC effects are the same

What device did you use to get the temporal 3 output?

What ones are being manufactured still?

Is there anything better with a notifier bell vs the 10-24

Hey Nic, what year do you think the 439D was released?

I think the vibrating bell sounds better in temporal code 3.

Want is your favorite fire alarm brand

Ok But is BELL

So I heard Canada is having wifi problems. You still have wifi