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Hi Emma,

Thank you very much for all your help - excellent service!

Fiona McGregor

Hi Dave,

Thank you for sending the information on the detectors I have passed this on to our client.

Thank you also for your continued help and assistance it is much appreciated.

Sam

Truly thank you for all of your help, Emma. This process was quick and painless.

David Jackson

Hi Deborah

Thank you very much for going extra mile for me. Great!

Best Regards

John

Dear Emma and Dear Robyn,
 
The 3 Beam 6500E-26 sensors arrived this week.
 
I would like to take this opportunity to thank you for your help and work in this somewhat complicated matter.
 
I wish you a nice week and a good weekend.
 
Thank you very much again!

Richard Molnai

Quick and easy help, just typical Acorn as usual. Thanks

Micheal Dunbar

Many thanks as always for the quality and speed of the service!

Shaun

Hi Emma,

Thank you for your awesome work!

William J

Good Morning Emma,

I must say you are the best.  Normally I do not receive such fast replies from overseas suppliers, and that too complete with courier charges.

Have a nice day.

 

Parvez

Hi Emma

Many thanks for your quick response. Just discovered your website today but it looks excellent!

Nicola Allan

Dave,

Always a pleasure bud and thank you for the information it worked an absolute treat!

Have a good weekend and take care sir!

Kind Regards 

Christopher Stevenson

Christopher Stevenson

Good afternoon Lauren.

Thank you for the fast response.

As ever I am very impressed with the excellent service you offer.

Alan

Thank you so very much Emma – quite amazing to receive such a prompt and pleasant response to my enquiry.

Carol Shield

Thanks for all the help

Lauren and Amelia - you are STARS.

Andy

Also want to say thanks to everyone at Acorn Fire & Security for a great day.

The training was extremely helpful and a good balance of practical to theory work in the course.

We look forward to sitting in on another training course in the near future.

Phil

Dear Lauren,
 
Thank you so much and very glad to be your customer.
 
Juladit C.
 

Juladit C

I would just like to point out how helpful Lauren has been. We have an issue where our office is next to a railway crossing and currently the crossing is closed for roadworks. This is causing an issue with deliveries. Lauren called me to discuss and has arranged for our delivery to be redirected. Customer service is very important and clearly displayed by Acorn and the whole team. We have used Acorn several times since setting up our account and nothing but praise.
 
Efficient, speedy, helpful, detailed, professional  are just a few words to describe your team.
 
I will continue to place our orders from Acorn. 
 
Regards 
Andrew

Andrew Wooding

Thanks to Lauren for helping resolve a problem.

She was helpful, efficient, and above all pleasant.

A real asset.

Catriona

Excellent Thanks. 

We are really happy with acorn since we started using you guys, the staff have been excellent. You have delivered items and me and my colleagues have collected. Thankyou for your help.

Regards Richard (Dalby Fire Group)

Richard

You provide a great service, you have an excellent range of products and deliver on the double. 

Here in Cork, Ireland it can be difficult to get certain brands and parts of fire alarm systems. You have been a great help. So thank you.

Trevor

Dave,

Installed these today, worked a treat.

Thanks.

Andrew

Good morning Emma,

Order has been well received yesterday, I can say that we are very happy with your service.

Best regards,

Denmark

We enjoy one of the best supplier relationships with Acorn due to the professionalism & quick response times allied with an enjoyable friendly nature of all the staff.

Paul

Morning Robyn,
 
I have just received the new battery in perfect order and would like to thank you for your quick response in this matter. It is in these situations that make the difference in who you choose to deal with. 
Thank you.
 
Kind Regards 
 
Alan Tapley 

Alan Tapley

Bless you Robyn, thank you so very much, your service is absolutely amazing!!
 
So many thanks 
 
Heather

Heather

I had a technical question regarding removal of detector heads and my query was answered quickly with a fast to & fro response with a positive outcome. Thanks to Jane!

Dennis

Ladies,

Thanks for all your help and excellent customer service! :-)

Kind Regards,

Ainsley Cooper

Hi Lauren,

Thank you very much, excellent service as usual.

Thanks

Paul

Thank you Elise, 
 
You have been so helpful with everything;  I hope your boss is paying you well you are an asset to your company. 
 
Have a lovely day.

Clive Morris

Hi Dave

Just a quick note to say thanks for the advice on the replacement of the Mother board. We attended a week ago and all went smoothly, no problems since (touch wood!).

Tim

Amelia - thank you so much for your reply.

Wonderful, knowledgeable customer service - a rarity these days and you even supplied me with a link to the product.

Jonathan Farquhar

Hi guys just giving a big shout out to Roxanne for her brilliant service provided to my company.
A pleasure to work with and this is a person who is extremely good at her job.
She has my vote for employee of the month! WELL DONE ROXANNE WHITWORTH! 

Gordon Gill

We have just purchased a SOLO kit from yourselves and I have say we have been very impressed with the service and support provided – thank you 

Darren

Thank you Jane! A fantastic member of staff, couldn't of been more helpful. An incredible asset to your company. 

James Sutton

Dear All,

We would just like to express our absolute gratitude with the support of these upcoming projects we have found ourselves working on. The level of customer support within Acorn Fire is unmatched within the industry. A massive credit to Acorn are two staff members in particular Lyndsey and Jess who are always on hand to answer calls when we need emergency parts. Their knowledge within the industry are second to none and we are proud to have Acorn as our supplier and partner.

Just thought we would drop you this note to show our gratitude.

Have a wonderful weekend.

Dale

Dale

Thanks Lauren

I wish all suppliers got back to me as quickly as you do!

Dani Webster

Hi Dave,

One happy customer, thanks for the assistance with this.

Trevor

Many thanks to you and your wonderful staff for your continued support throughout the year.

Much appreciated.

Dave

Thankyou so much for your assistance, I don't know how you managed to source this equipment, but I'm very glad you did. All fitted and working now!!

Med vennlig hilsen

K Larsen

Hi Lauren,

The below parts have just arrived! That was very quick and efficient!

Thankyou for organising that

Harriet

Hello

Perfect service, thank you

Regards

Rory

Bless, over and above call of duty. Honestly Jess you been a little star with this one...

Regards,

Sharon

Sharon

Hi Dave
 
Thanks again for your valued advice and support.
 
Regards
 
Chris

Chris McCormick

Thank you for your speedy service, our order arrived this morning.

Karen

I received and checked through my order today and everything is as it should be.

Thanks again to you and to Acorn fire and security for a great and efficient service.

Costa

Thank you Amelia

Very much appreciated, if only all suppliers where as quick and efficient as you guys, I would be laughing!

Tony

Robyn,

You my dear are an angel sent from the heavens of wonderfulness!

Thanks a lot for your help its appreciated!

Luke B

You’re the best, thanks!

Have a nice weekend.

Best regards / Met vriendelijke groet

Netherlands

To all at Acorn,

On behalf of myself, and our Service staff, thankyou for your continued support, and thankyou for going the extra mile last week; our Client is now extremely satisfied!

Patrick

Hi Robyn, 
  
Thank you so much I really appreciate all your help, you have been an absolute star!

Lorna Jones

Many many thanks for the amazingly prompt service. Having been told that Syncro AS units were obsolete I thank God for Google and Acorn! Keep up the good work! 

John Gaskin

Thanks Lauren,

it’s so nice to deal with a company who are so accommodating, it’s been a refreshing change for us!

Catherine

Hi,
 
Fantastic work over the last few weeks keeping up with our ever increasing (sometimes difficult) demands.
 
Have a great weekend and keep up the good work! 

Chris

Good Afternoon, Lauren
 
Thank you for your very prompt reply to my email, so unusual in these days, so much appreciated.

Martin Singleton

Dear John, 
  
Many thanks for your support. Thanks to your advice system is back in proper operation. Much appreciated. 

Marek

Dear Emma,
Thank you for your kind answer.
I very appreciate your excellent support. You are probably only one person of distributors (except manufacturers who have excellent technical support also).

Tibor Lelkes

Perfect, thank you.
 
Brilliant Customer Service, Speedy Response!

Kayleigh Williams

Hi Dave,

Many thanks for your swift reply & valued advise. (great service)

Regards.

Nick

Acorn Fire & Security have vastly improved our business, through excellent customer service from point of order, through to rapid delivery to our Engineers in the field.

Steven Troy

Brilliant response, had immediate information. Told me next steps. Couldn't have been more helpful. Thank you Jane.

James

Cheers Dave you're a star

Kind Regards

Neil

Fireclass 516.300.411FC FV411F Triple Infrared Flame Detector

Fireclass 516.300.411FC FV411F Triple Infrared Flame Detector

Fireclass

£2,315.65 Ex VAT £2,778.78 Inc VAT
Product Code: 516.300.411FC
Qty:   Add to Cart
UK Mainland Delivery £8.34 Inc VAT
£6.95 Ex VAT

Got a Question? Email or Call Us on +44 (0) 1254 207532

Fireclass 516.300.411FC FV411F Triple Infrared Flame Detector

The FV400 series uses Triple IR Solar Blind technology for flame detection. This provides a reliable and cost-effective solution in standard flame detection applications especially where there is a single hazard in the field of view. The FV400 detectors use Triple IR Solar Blind sensing technology and flame detection algorithms to provide high performance sensing capabilities for hydrocarbon fires. This includes the ability to reliably sense flames through high densities of solvent vapours and black smoke, increasing the probability of early detection with consistent high sensitivity to flame throughout the whole field of view.

They also ensure consistent detection of many different types of hydrocarbon fuels from alcohol to aviation fuel. Multiple interfaces are provided with the option of an integral CCTV camera to provide a visual means of operator verification.

Key Features

  • Triple IR solar blind sensing technology
  • Multiple Field Interfaces
  • Detection range: Up to 65 m for 0.1 m2n-heptanepan fire
  • Automatic optical path monitoring
  • Integral flame simulation and remote walk test help reduce the ongoing life time cost of the flame detection installation
  • Video verification via the integrated optional flameproof camera
  • Fast and reliable, high sensitivity flame detection with high false alarm immunity, throughout a wide field of view
  • Consistent detection of different sizes of flames from a wide range of hydrocarbon fuels such as wood cellulose, alcohol to aviation fuel (JP4 and JP5)
  • Simplifies alarm handling for remote control situations
  • Excellent false alarm immunity. Proven to be immune to common radiation sources (continuous or modulated) such as halogen lamps, lightning, X-rays, sparks, corona, welding, heaters, etc
  • Unaffected by sunlight, completely solar blind

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