Scott Safety Protege SG Single Gas Monitor (Reusable)
Scott Safety Protege SG Single Gas Monitor (Reusable) Scott Safety Protege SG Single Gas Monitor (Reusable)

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Price From: £171.00 exc VAT £171.00 inc VAT £205.20

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

Please note: This product has been discontinued - visit our single gas monitors page for a suitable replacement.

Reusable single gas detector from Scott Safety. Available in the following gases: O2, H2S, CO, CO-H2, HCN, O3, NO, NO2, PH3, SO2, NH3, Cl2 and ClO2.

Protege ZM Single Gas is still available but limited to O2, CO and H2S. 

Visit our YouTube Channel for Scott Safety Protégé video tutorials and reviews.

Availability: Out of stock

Description / Features / Spec


Scott Safety Protege SG Single Gas Monitor (Reusable)

Please note: This product has been discontinued - visit our single gas monitors page for a suitable replacement.

GMI Protege ZM Single Gas Monitor for measuring - CO, H2S and O2

The Scott Safety Protege SG is a single gas detector that comes in a range of different gases.  Choose from O2, H2S, CO, CO-H2, HCN, O3, NO, NO2, PH3, SO2, NH3, Cl2 and ClO2.  This is a reusable gas detector so it has a lifetime of 1.5 to 2 years, depending on gas type and it can be calibrated every 6 months.

It has the ability to interchange sensors and when a different gas sensor is inserted, the unit will instantly recognise the type and update the gas label on the display.  There's no programming required and the user can change sensors in field.  This provides an advantage as the Protege can be used in various different applications. 

See below the sensor types and range for these sensors.

Factory Default Alarm Setpoint

O2 - 0 to 30%

H2S (Standard) - 0 to 500 ppm

H2S (High Resolution) - 0 to 100 ppm

CO (Standard) - 0 to 1000 ppm

CO (Hydrogen Resistant) - 0 to 2000 ppm

HCN -0 to 100 ppm

O3 - 0 to 3 ppm

NO - 0 to 350 ppm

NO2 - 0 to 100 ppm

PH3 - 0 to 20 ppm

SO2 - 0 to 150 ppm

NH3 - 0 to 300 ppm

CI2 - 0 to 50 ppm

CIO2 - 0 to 5 ppm

LEL IR - 0 to 100% LEL

Key Features

  • Two-button use and one-button activation
  • Adjustable alarm settings
  • Easy to read
  • User-friendly with an intuitive menu
  • IP66-67 protection
  • Carries out a self-test upon start up
  • Replaceable filters and sensors
  • Capable of logging up to 5,000 events and this can be downloaded via software



10.7cm x 5.8cm x 2.2cm (H x W x D)



Temperature Range

-20°C to + 50°C

Run Time

1.5 to 2 years

Multi Language Support

English, French, Spanish, Portuguese, Italian, German, Dutch, Swedish and Finnish

Battery Type


Battery Life

1.5 years

Latching Alarms

Latching alarms are supported (user configurable)



Approved Temperature Range

-20°C to + 50°C


3 Years from date of shipment from Manufacturer
Warranty covers monitor assembly, including sensors: 3 years for CO, O2, H2S,  2 years for NO, NO2, PH3, SO2, NH3, Cl2, ClO2, O3


  • CSA (Class I Div I, Groups A, B, C, D), Intrinsically Safe, Ex ia sécurité intrinsèque
  • Ex (ATEX certification standards and dates: EN 60079-0:2012 and EN 60079-11:2012, Ex ia IIC T4 Gb)

  • CE - RoHS Directive, ATEX Directive, EMC Directive

  • IEC IECEx - IECEx certification standards and dates: IEC 60079-0:2011 and IEC 60079-11:2011, Ex ia IIC T4 Gb


EN50014,   EN50018, EN50020, EN50104, EN45544, IEC60079-0/-1 IEC60079-11


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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. 

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 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.

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