Crowcon TXgard-IS+ Crowcon

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10 OKTOBER 2025

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Crowcon TXgard-IS+ Crowcon

The Crowcon TXgard-IS+ is an intrinsically safe (I.S.) toxic and oxygen gas detector with a local LCD display. A very wide choice of sensors are available for use in a variety of applications. TXgard-IS+ is ATEX certified for use in Zone 0,1 or 2 hazardous areas and also UL and cUL certified for use in Division 1 or 2 hazardous areas.

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 – works with a wide selection of control panels
2 wire format

Rugged and reliable

Made from tough carbon loaded nylon
Ingress protection to IP65 as standard

Low cost of ownership

Non-intrusive one-man 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

Extensive range of electrochemical sensors for toxic gases and oxygen

Size	160 x 123 x 92mm (6.3 x 4.8 x 4.5ins)
Weight	0.7kg (1.5lbs)
Ingress protection	IP65
Enclosure material	Junction box: Carbon loaded nylon Sensor housing: ABD Plastic
Power	8-32Vdc, 4-20mA loop-powered
Cable entries	1 x M20 or 1/2” NPT with adaptor
Operating temperature	-20°C to +55°C (-4°F to 132°F) *
Humidity	15 to 90% RH non-condensing
Display	2-Line, 16 character LCD
Calibration method	Via push-buttons
Electrical output	2 wire 4-20mA sink
Terminals	Suitable for up to 2.5mm2 cable
Sensor type	Electrochemical
Repeatability	+/- 2% FSD typically
Zero drift	+/- 2% FSD, 6 months typically
Response time	Contact Crowcon for a full list of sensor response times
Performance	Tested in accordance with EN60079-29-1
Hazardous area zones	Zone 0, 1 or 2 Division 1 or 2 (when connected via an isolation device)
Approvals	Ex II 1 G Ex ia IIC T4 (-40°C to +65°C) Exia IIC T4 Gb Tamb -20°C to +55°C UL Class I, groups A, B, C and D
EMC compliance	EN 50270, FCC: CFR 47 Part 15, ICES-003