Crowcon Gasmaster 4 - Gas Detection Control Panel
Crowcon Gasmaster 4 - Gas Detection Control Panel Crowcon Gasmaster 4 - Gas Detection Control Panel

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Price From: £1,267.00 exc VAT £1,267.00 inc VAT £1,520.40

Price as configured: exc VAT £0.00 inc VAT £0.00

Price as configured: exc VAT £0.00 inc VAT £0.00

Availability: In stock

Description / Features / Spec


Crowcon Gasmaster 4 - Gas Detection Control Panel

This Crowcon Wall mounted control unit with LCD display is for up to four 4-20mA or mV pellistor-type gas detectors, fire zones (up to 20 heat/smoke detectors or call points per zone), flame detectors or ESU sampling units. It features RS-485 Modbus communications for DCS/PLC/SCADA connection, event logging, as well as dedicated drives for 12/24Vdc audible/visual alarms.

Double-pole relays with contacts rated 8A 250Vac (non-inductive) are supplied to indicate Alarm 1, Alarm 2 and Fault. 4-20mA or 1-5Vdc analogue outputs are provided per channel. Gasmaster operates from 90-264Vac and has 1.2Ah back-up batteries fitted as standard.

Display language options are available: English (as standard), French, Dutch, Spanish, German, Italian, Czech and Polish. If the display is required in a language other than English, please state the language clearly on the order.

Key Features

  • IP65 Rated
  • Multi-language display options


Gasmaster 1

Gasmaster 4


288 x 278 x 110mm (11.3 x 10.9 x 4.3 inches)


4.5kg (10lbs)

Enclosure material

Back-box: cast aluminium
Front cover: ABS (flame retardant)

Ingress protection



100-240Vac 50-60Hz or
20-30Vdc, 60W max

Battery back-up

1.2Ah batteries fitted internally

Operating temperature

-10°C to +50°C (14°F to +122°F)


Gas    One 2 or 3 wire 4-20mA gas detector (sink or source) or mV pellistor flammable gas detector

One to four 2 or 3 wire 4-20mA gas detectors (sink or source) or mV pellistor flammable gas detectors

Fire     One loop of up to 20 conventional smoke/heat detectors or manual call points, or one flame detector (4-20mA or digital contact signal)

One to four loops of up to 20 conventional smoke/heat detectors or manual call points, or one to four flame detectors

ESU    For use with one Crowcon ESU fan

Remote inhibit/retest    Via normally open contact


Relays DPCO contacts rated 250Vac 8A
Low alarm. High alarm. Fault. Alarm relays can be set for rising or falling alarms. Hysteresis can be adjusted on low alarms

Low alarm and high alarm per channel plus common low, high and fault. Alarm relays can be set for rising or falling alarms. Hysteresis can be adjusted on low alarms

A/V alarm drive    12Vdc or 24Vdc 650mA max. drive. Suitable for +ve or -ve switched alarms

Analogue     4-20mA (current source, max. loop resistance 700?) or 1-5Vdc (min. load 50k? )

4-20mA for each channel (current source, max. loop resistance 700?) or 1-5Vdc (min. load 50k?)

Serial link    RS-485 Modbus RTU for monitoring and control via DCS/SCADA/PLC systems

Communications port

Optional port for PC configuration and event log upload

Event logging*

Time-stamped log of up to 300 alarms, fault or system intervention activities

Panel indication

LCD back-lit display shows gas level (in ppb, ppm, % volume or % LEL units), and scrolling alpha-numeric status indication.
LED’s for Alarm, Fault, Power and Warning. Integral 85dB sounder (at 10cm)


EMC: EN50270, EN60945, FCC: CFR 47 Part 15; ICES – 003
ATEX: May be used in a non-hazardous area as part of Intrinsically Safe System conforming to EN60079-25 Baseefa 05Y0090/1

Functional safety

Validated to IEC61508


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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.

Please note: we're currently facing high demand for all Facemasks and Filters, due to the Coronavirus outbreak.  Our stock levels are changing constantly and we're working hard to fulfill demand where we can. This means that express delivery may not always be available and standard lead times may vary, however our Sales Team will be in touch to advise latest delivery timescales. 

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UK Mainland Standard Delivery on orders under £75 ex VAT - £5.95 ex VAT*
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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.

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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 fourteen 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.