The TXgard-IS+ will be discontinued and no longer available to purchase from 31st December 2025. The replacements are either the Xgard type 1 or Xgard Bright.

A versatile, toxic, and oxygen gas detector with LCD display and non-intrusive calibration. Available for detecting a wide range of gases, the Crowcon TXgard-IS+ is Intrinsically Safe, ATEX and IECEx certified for use in Zone 0, 1 or 2 hazardous areas, and UL and cUL certified for use in Division 1 or 2 hazardous areas.

The TXgard-IS+ uses an electrochemical sensor within a reusable bayonet housing. Supplied with a carbon-loaded nylon junction box, which contains the amplifier/transmitter to provide a 2-wire 4 to 20mA output (M20 cable gland entry). The LCD has a 2 x 16 character display with menu functions accessed via a keypad.

Features

Non-intrusive calibration

• Calibration can be performed locally without hot work permits and minimises operational downtime.
• 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.
• Two-wire format.

Rugged and reliable

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

Low cost of ownership

• Non-intrusive one-person calibration – easy to operate and maintain.
• Long-life sensors – minimise interruptions to on-site activity.
• Simple parts replacement.

Wide range of sensors

• An extensive range of electrochemical sensors for toxic gases and oxygen.

Specifications

Parameter	Details
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	Two-wire 4-20mA sink
Terminals	Suitable for up to 2.5mm² cable
Sensor Type	Electrochemical
Repeatability	± 2% FSD typically
Zero Drift	± 2% FSD, six months typically
Response Time	Contact for 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 (with isolation device)
Approvals	Ex II 1 G Ex ia IIC T4 (-40°C to +65°C) Ex ia 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