Crowcon XgardIQ Fixed Gas Detector


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The Crowcon XgardIQ is the most intelligent fixed gas detector, which increases safety by minimising the time operators must spend in hazardous areas.

The Crowcon XgardIQ is a versatile transmitter and gas detector and has a wide range of featuers that protect engineers and support facilities managers of oil, gas, chemical & petrochemical plants to name a few.  The XgardIQ is available with a variety of sensors for flammable, toxic, oxygen or fixed H2S gas detection.

GasSensor TypeUnitsMax RangeStandard RangeAlarm Level 1+Alarm Level 2+Temperature range °C
Oxygen (O2)Electrochemical%Vol302519 (falling)17 (falling)-20 to +50
Ammonia (NH3)Electrochemicalppm100/1000502535-20 to +40
Carbon Monoxide (CO)Electrochemicalppm100025030200-30 to +50
Hydrogen Fluoride (HF)Electrochemicalppm10101.83+5 to +40
Hydrogen Sulphide (H2S)Electrochemicalppm100/20025510-30 to +50
Hight Temp (H2S)Electrochemicalppm200100510-30 to +70
Chlorine (Cl2)Electrochemicalppm205, 10 or 200.51-20 to +50
Ozone (O3)Electrochemicalppm110.10.2-20 to +40
Sulphur dioxide (SO2)Electrochemicalppm1001011-30 to +50
Hydrogen (H2)Pellistor%LEL1001002040-40 to +75
Methane (CH4)Pellistor%LEL1001002040-40 to +75
Pentane (C5H12)Pellistor%LEL1001002040-40 to +75
Propane (C3H8)Pellistor%LEL1001002040-40 to +75
Ethanol (C2H6O)IR%LEL1001002040-20 to +55
LPGIR%LEL1001002040-20 to +55
Methane (CH4)IR%LEL1001002040-20 to +55
Pentane (C5H12)IR%LEL1001002040-20 to +55
Propane (C3H8)IR%LEL1001002040-20 to +55


Additional information


XgardIQ transmitter H278 x W140 x D89mm (10.9 x 5.5 x 3.5ins)


XgardIQ transmitter: 4.1kg (9lbs, stainless steel)


316 stainless steel

IP Rating



Three M20 or 1/2”NPT cable gland entries. Certified, removable plugs are fitted to left-hand and lower right-hand entries


14-30Vdc. < 4W


Indicators: Amber, Red and Green LEDs for detector status Blue Positive Safety LED, Main display: OLED 128 x 64 pixels, yellow text on black background

Electrical Output

4-20mA current sink or source (auto-sense or manual selection) Warning and fault signals are configurable NAMUR NE 43 compliant, HART 7 over 4-20mA signal and via local I.S. test points (optional), Relay configuration options Energised or de-energised Latching or non-latching Rising or falling Configurable On and Off delays for alarm relays, Relays (optional) Alarm 1, Alarm 2, Fault SPDT contacts rated 5A, 230Vac (Fault relay: SPST contacts), RS-485 Modbus RTU

Event Log

Records alarm, fault and maintenance events. Events can be viewed on-screen and downloaded to a PC


Electrochemical, Infrared


Stainless steel

Gas Type

ammonia sensor module (0-100ppm), ammonia sensor module (0-50ppm), carbon monoxide sensor module (0-1000ppm), carbon monoxide sensor module (0-250ppm), carbon monoxide sensor module (0-500ppm), hydrogen sulphide sensor module (0-100ppm), hydrogen sulphide sensor module (0-200ppm), hydrogen sulphide sensor module (0-25ppm), hydrogen sulphide sensor module (0-50ppm), IR ethanol sensor module (0-100% LEL), IR LPG sensor module (0-100% LEL), IR methane sensor module (0-100% LEL), IR pentane sensor module (0-100% LEL), IR propane sensor module (0-100% LEL)


HART disabled & RS485, HART enabled & RS485