TXGARD IS+

TXgard IS+ is an Intrinsically Safe (I.S.) toxic and oxygen gas detector with local LCD display. Toxic gas detectors are 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, with a wide choice of sensors available for use in a variety of applications.

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This Intrinsically Safe (I.S) gas detector is designed to operate safely in environments where flammable gases, vapours, or combustible dust may be present, making it the perfect choice for hazardous environments.

With an extensive range of electrochemical sensors for oxygen and toxic gas detection, the Txgard IS+ provides multi-gas detection with an uncompromising approach to safety. Rugged and reliable, the Txgard IS+ is made from tough carbon loaded nylon, with ingress protection to IP65 as standard.

Calibration can be performed locally without the need for hot work permits, as local display and buttons enable calibration without opening the junction box, minimising operational down-time.
With flexible output options, simple parts replacement and long-life sensors designed to keep interruption to on-site activity to a minimum, the Txgard IS+ offers comprehensive gas detection with low ownership costs.

Intrinsically Safe detector

Wide range of electrochemical sensors

Rugged and reliable

Non-intrusive calibration

Flexible output options

Non-Intrusive Calibration

Calibration can be performed locally without the need for hot work permits, minimising operational down-time
Local display and buttons enable calibration without opening the junction box
No opening of the detector is required for calibration, meaning there is no need to declassify the area for calibration

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

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

Gas	Range Available
Ammonia (NH₃)	50, 100, 1000ppm
Chlorine (Cl₂)	5, 10, 20ppm
Carbon monoxide (CO)	250, 500ppm
Chlorine dioxide (ClO₂)	1ppm
Hydrogen (H₂₎	2000ppm, 50% LEL, 100% LEL
Hydrogen cyanide (HCN)	25ppm
Hydrogen sulphide (H₂S)	25, 50, 100, 200ppm
Hydrogen fluoride (HF)	10ppm
Nitrogen dioxide (NO₂)	10ppm
Oxygen (O₂)	25% vol.
Ozone (O₃)	1ppm
Phosgene (COCl₂)	1ppm
Phosphine (PH₃)	2ppm
Sulphur dioxide (SO₂)	10, 20, 30ppm

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