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Product Features
  • Local Calibration

  • 20mA current sink or source

  • 3 wire format

  • IP65 as standard

Delivery options

At Cadmus Products we aim to deliver orders efficiently and at highly competitive rates. 

  • We can ship consignments of all shapes and sizes and hazardous content across the UK and worldwide. Most of our orders are sent via DHL, however sometimes we may use other couriers.
  • If you are purchasing a laboratory product online you can find out the price of shipping checkout. If you are obtaining a quote for a product, then we will email you
    with our best shipping prices along with your quote.
  • Please see our delivery page for full information

Crowcon Flamgard Plus EXD Flammable Gas Detector

The Crowcon Flamgard Plus is a flameproof (Ex d) pellistor based detector with display & 4-20mA output, for hydrocarbons, hydrogen & petrol vapours. The Flamgard Plus is a Flameproof (Exd) flammable gas detector which uses poison-resistant pellistors to detect explosive levels of hydrocarbons, hydrogen and other flammable gases and vapours, including aviation fuel and leaded petrol vapours.

Non-intrusive calibration
  • Calibration can be performed locally without the need for hot work permits – minimises operational down-time
  • Local display and buttons enable calibration without opening the junction box
Flexible output options
  • 4-20mA current sink or source – works with a wide selection of control panels
  • 3 wire format
  • Optional relays for alarm and fault – can be used for switching local alarms
Rugged and reliable
  • Constructed using marine-grade aluminium with a stainless steel sensor housing – proven track record for operation in the harshest environments
  • Ingress protection to IP65 as standard
Low cost of ownership
  • Non-intrusive one-person calibration – easy to operate and maintain
  • Long-life sensors – keeps interruption to on-site activity to a minimum
  • Simple parts replacement
Wide range of sensors
  • Choice of catalytic beads for a wide selection of flammable gases and vapours – gas detector tailored to your requirements
Size 200 x 115 x 115mm (7.9 x 6.1 x 6.1ins)
Weight 2.2kg (4.9lbs)
Ingress protection IP65
Enclosure material Junction box: Marine grade alloy
Sensor housing: 316 stainless steel
Power 10-30Vdc, 210mA max (relay version)
160mA max (non relay)
Cable entries 2 x M20 or 1/2” NPT
Operating temperature -10°C to +55°C (-14°F to 131°F) *
Humidity 0 to 99% RH non-condensing
Relays (optional) SPNO or SPNC contacts rated
30Vdc 1A (non-inductive load) for Alarm 1, Alarm 2, Fault
Display 3-digit LCD back-lit display, LED status indicator
Calibration method Via magnetically operated buttons
Electrical output 3 wire 4-20mA, sink or source
Terminals Suitable for up to 1.5mm2 cable
Sensor type Catalytic bead
Repeatability +/- 2% FSD typically
Zero drift +/- 2% FSD, 6 months typically
Response time T90 <15 seconds typically
Performance Tested in accordance with EN60079-29-1
Hazardous area zones Zone 1 or 2
Approvals Ex II 2 G
Ex db IIC T6 Tamb -20°C to +55°C
EMC compliance EN 50270, FCC: CFR 47 Part 15, ICES-003

* Figures shown exclude the sensors – Please contact us for a full list of sensor operating temperatures

Gases and Ranges

Gas LEL (% vol.) Range Available
Acetylene (C2H2)*  2.3 0-100% LEL
Ammonia (NH3) 15 0-100% LEL
Butane (C4H10 1.4 0-100% LEL
Ethanol (C2H5OH) 3.1 0-100% LEL
Ethane (C2H6) 2.4 0-100% LEL
Ethylene (C2H4) 2.3 0-100% LEL
Hexane (C6H14) 1.0 0-100% LEL
Hydrogen (H2) 4 0-100% LEL
LPG 2 0-100% LEL
Methane (CH4) 4.4 0-100% LEL
Methanol (CH3OH)  6 0-100% LEL
Pentane (C5H12) 1.1 0-100% LEL
 Petrol vapor   1.3 0-100% LEL
Propane (C3H8) 1.7 0-100% LEL
Propanol (C3H8O) 2.1 0-100% LEL
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