Worldwide Shipping
Large Orders? Request a Quote
Delivery To UK Mainland £6.95 + VAT
Manufacturers
Testimonials

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 for all the help

Lauren and Amelia - you are STARS.

Andy

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

Ladies,

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

Kind Regards,

Ainsley Cooper

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

Chris McCormick

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

Robyn,

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

Thanks a lot for your help its appreciated!

Luke B

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

David Jackson

Cheers Dave you're a star

Kind Regards

Neil

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

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

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

Hi Deborah

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

Best Regards

John

Hi Emma,

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

Fiona McGregor

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

Lorna Jones

Thanks Lauren

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

Dani Webster

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

Kayleigh Williams

Hi Emma

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

Nicola Allan

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

Hi Dave,

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

Regards.

Nick

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

Carol Shield

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

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

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

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

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

Thanks to Lauren for helping resolve a problem.

She was helpful, efficient, and above all pleasant.

A real asset.

Catriona

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

Thank you Amelia

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

Tony

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

Hi Dave,

One happy customer, thanks for the assistance with this.

Trevor

Hi Emma,

Thank you for your awesome work!

William J

Good morning Emma,

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

Best regards,

Denmark

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

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

Marek

Hi Lauren,

Thank you very much, excellent service as usual.

Thanks

Paul

Hello

Perfect service, thank you

Regards

Rory

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

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

Martin Singleton

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

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

Thanks Lauren,

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

Catherine

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

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

Heather

Hi Lauren,

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

Thankyou for organising that

Harriet

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

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

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

James

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

Good afternoon Lauren.

Thank you for the fast response.

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

Alan

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

Shaun

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

Karen

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

Regards,

Sharon

Sharon

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

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

Juladit C

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

Micheal Dunbar

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

Much appreciated.

Dave

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

James Sutton

Notifier NFX-TDIFF-IV A1R Rate Of Rise & Fixed Heat Detector - Ivory

Notifier NFX-TDIFF-IV A1R Rate Of Rise & Fixed Heat Detector - Ivory

Notifier

£75.71 Ex VAT £90.85 Inc VAT
Product Code: NFX-TDIFF-IV
Base Option:



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

Notifier NFX-TDIFF-IV A1R Rate Of Rise & Fixed Heat Detector - Ivory

The Opal NFXI-TFIX58 & NFXI-TFIX78 are fixed temperature analogue addressable sensors employing low mass thermistors and microprocessor technology for fast response and linear temperature sensing. Their linear response allows these sensors to be used to signal temperatures over the range of 58°C (Class A1S) to 78°C (Class BS).

The Opal NFXI-TDIFF uses the same thermistor and microprocessor technology to provide an alarm when the rate of rise in temperature exceeds 10°C/minute (typical) or if the temperature exceeds a threshold of 58°C (Response Class A1R). Notifier’s Opal protocol allows it to be software configured to be either a fixed 58°C, a fixed 78°C unit or a 58°C with rate of rise device. For backwards compatibility and approval continuity, three separate versions continue to be available as separate part numbers.

The sensing elements of all three heat sensors are panel controllable through the Opal Protocol so the sensitivity thresholds of each element can be changed by the panel offering the ability to customise the device for the changing use of the area it is protecting. The detectors have built in short circuit isolation and two integral tri-colour LEDs that provide 360° local visual indication of the device status. The LEDs are programmable with static or blinking red, amber and green status indications available.

Key Features:

  • Built in short circuit isolation
  • New advanced Opal protocol allows mapping of the loop for precise fault location using isolators
  • Tri colour LED offering red, green and amber colours
  • Rotary decade address switches
  • Pure white colour to complement modern buildings
  • 100% mechanical and electrical backwards compatibility
  • Base designed to ease installation and wiring
  • Kantech
  • ACT
  • Baldwin Boxall
  • Apollo
  • Crowcon
  • System Sensor
  • Fike
  • C-Tec
  • Morley
  • Patol
  • Ziton
  • Nittan
  • Gent
  • Kentec
  • Tyco
  • Vimpex
  • Menvier
  • Vesda
  • Hyfire
  • Hochiki
  • Advanced Electronics
  • KAC
  • JSB
  • Crowcon
  • Global Fire
  • Scope