Frontline 404
Frontline 404

Product Code - Frontline-404

exc VAT £0.00 inc VAT £0.00
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Description / Features / Spec


The Frontline 404 has been designed with features that provide an effective response to the detection of gas hazards in a wide range of environments, from commercial premises through to heavy industrial applications requiring hazardous area sensing.  Typical monitor locations are public buildings, boiler plant rooms, swimming pools, water treatment works, H&V control systems, manufacturing and processing plants.

Key Features

  • Versatile System Configuration
  • Flammable, Oxygen and Toxic Gases
  • 1 to 4 sensors
  • Plug in sensor channel cards
  • Two alarm stages


Sensor Points

1 ~ 4


  • Combustible Gas - L.E.L., % vol, ppm
  • Toxic Gas - ppm, % vol
  • Oxygen - % vol Depletion/Enrichment
  • Any 4~20mA input signal

Power Supply

230/115v AC or 24v DC and specials

Power Consumption

12 watts - full alarm


  • Power - Green L.E.D
  • Mains Fail - power indicator change green to amber
  • Alarms - Red L.E.D.s
  • Fault - Amber L.E.D
  • Digital Display - 31/2 Digit - gas readout
  • Sensor channel selection indicator - Amber L.E.D
  • System test - Alarm L.E.D.s flashing
  • Alarm Relay Inhibit - Fault L.E.D on


  • High Alarm Relay - Common D.P.C.O
    Normally energised or de-energised, latched or unlatched
  • Low Alarm Relay - Common D.P.C.O
    Normally energised or de-energised, latched or unlatched
  • Fault Alarm Relay - Common S.P.C.O
    Normally energised or de-energised
  • Channel Relays - 1 per channel high or low selectable S.P.C.O
    Normally energised or de-energised, latched or unlatched
  • General Alarm Relay - resetable S.P.C.O
  • All contacts rated 5A-230vAC
  • Analogue 4 ~ 20mA output per channel
  • Output 24vDC @ 100mA max - auxiliary equipment (non inductive)

Audible Alarm

  • Permanent mute option.
    Lo, Hi, Fault alarms

Alarm Settings

  • Digital Setting (fully adjustable between zero and fullscale)
  • Delay to alarm T1 - 10 seconds, T2 - 30 seconds, T1 + T2 - 10 minutes

Sensor inputs

  • Bridge type 3 wire mV input
  • 4~20mA (electrochemical/infrared)

 Sensor cable

3 core 1.5mm2 screened < 1.5km


  • EMC approvals EN50270 Marine EN60945
  • Enclosure - cable entry - bottom/rear
  • Operating temperature -10 to +50˚C
  • Relative Humidity 0 - 90%
  • Protection IP52 - option IP65
  • Optional backup battery
  • Field terminals - 2.5mm quick release
  • System/lamp test
  • Remote Accept/Reset
  • Alarm isolate during service - inhibit


  • Size - 310W x 265H x 75Dmm
  • Weight - 3.6kg

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Take advantage of our web-exclusive free UK mainland* delivery offer on orders over £75 ex VAT.  See all costs for delivery below and visit our main delivery page for more information on timescales as some restrictions may apply.

UK & Ireland Delivery Options

UK Mainland Standard Delivery on orders under £75 ex VAT - £5.95 ex VAT*
UK Mainland Express Delivery - £21.50 ex VAT (timescales vary – please see delivery page)
Highlands Delivery - £25.00 ex VAT
Channel Island Delivery - £40 ex VAT
Northern Ireland & Republic of Ireland - £25 ex VAT
Saturday Delivery Options – Please contact us on 0141 771 7749 for more info

Standard delivery timescales are normally 3-5 working days, depending on stock availability.  Express delivery is normally 1-3 working days, depending on stock availability.  Although we carry an extensive stock, there may be some items that are unavailable due to quantities or otherwise.  In this case we will inform you of the status of your order and whether or not it can be fulfilled within our standard delivery timeframe. *Mainland UK delivery excludes Northern Ireland, other charges apply.

Please visit our main delivery page for more terms and conditions or contact our Sales Team on 0141 771 7749  or [email protected] for more information.

International Delivery Options

Delivery costs vary between countries.  Please visit our main delivery page for more information.



Should you wish to cancel an order or return unwanted goods please follow the procedures detailed below to help us ensure cancellations/returns are processed as quickly and efficiently as possible.

Simply log on to your customer account, note the order reference number and email the full cancellation details to [email protected] or contact us on 0844 550 0001. Assuming the order has not been despatched we will cancel.

You have the right to cancel the purchase of goods without having to give a reason at any time within the “cooling off period” of seven working days, beginning the day after you take delivery of your order.

You must notify us of your cancellation in writing via email to [email protected] or to our contact address. (Details Here)

If you are in possession of the goods you are under the duty to retain them and take reasonable care of them.

You must send the goods back to us in their original condition to our contact address at your own cost (unless we delivered the item to you in error or the item is damaged or defective) as soon as possible once you have cancelled the contract.

Alternatively we will collect the goods from you which will incur a charge no greater than the actual cost of arranging the collection and shipping. In this case you must make the goods available for collection. We will contact you to make further arrangements.

We reserve the right to make a charge not exceeding our direct costs of recovering the goods if you do not return the goods or return them at our expense.

Upon receipt of returned items in satisfactory condition we will arrange a full credit by the same method used to pay for the goods originally. Any credit due will be processed within a maximum of thirty days.

Note: If you wish to return goods for refund or exchange after 14 days, a re-stocking fee of 20% of the full order total will apply.

If upon receipt of goods you find them to be faulty, damaged or if you have been incorrectly supplied an item, you should notify us within 24 hours by contacting 0844 500 0001 or [email protected] and quoting your order number and contact details.

Frontline Safety will arrange uplift of any damaged or wrongly received goods and if on inspection of goods we also find them to be damaged, faulty or incorrectly supplied, we will offer replacement goods or provide a full refund.

We recommend you inspect all goods prior to signing for and accepting delivery. If there is any visible damage to the outer packaging, ensure goods are sign for as damaged. In instances where it isn’t possible to sign for goods as damaged, these should be signed for as unexamined.

Note: If your goods happen to develop a fault out with the standard returns period but within supplied warranty period or if you require any additional assistance, please contact us on 0844 550 0001 or email [email protected]


All postage, handling, customs and duty charges for all returned goods are the responsibility of the customer. We recommend using a fully traceable, insured service as goods are your responsibility while in transit.