Crowcon TXgard-IS+

Code: TIP
  • Intrinsically safe
  • Toxic gas detection
  • Intuitive display

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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 re-usable bayonet housing. Supplied with 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.


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 – keep 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 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 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

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Title Size
TXgard-flamgard-plus-Datasheet 213 KB
TXgard-IS-Iss8-Manual 1 MB

Additional information

Weight 0.09 kg

Ordering Information

TIP-AF-AA-011-ZZ TXgard-IS+ H2-100LEL M20(Top) ATEX/IECEx
TIP-AF-AB-011-ZZ TXgard-IS+ H2-100LEL M20(Side) ATEX/IECEx
TIP-AG-AA-002-ZZ TXgard-IS+ O2-25vol M20(Top) UL/cUL
TIP-AG-AA-011-ZZ TXgard-IS+ O2-25vol M20(Top) ATEX/IECEx
TIP-AG-AB-002-ZZ TXgard-IS+ O2-25vol M20(Side) UL/cUL
TIP-AG-AB-011-ZZ TXgard-IS+ O2-25vol M20(Side) ATEX/IECEx
TIP-AH-AA-011-ZZ TXgard-IS+ CO-500ppm M20(Top) ATEX/IECEx
TIP-AH-AB-011-ZZ TXgard-IS+ CO-500ppm M20(Side) ATEX/IECEx
TIP-AI-AA-011-ZZ TXgard-IS+ H2S-100ppm M20(Top) ATEX/IECEx
TIP-AI-AB-011-ZZ TXgard-IS+ H2S-100ppm M20(Side) ATEX/IECEx
TIP-AJ-AA-002-ZZ TXgard-IS+ SO2-10ppm M20(Top) UL/cUL
TIP-AJ-AA-011-ZZ TXgard-IS+ SO2-10ppm M20(Top) ATEX/IECEx
TIP-AJ-AB-011-ZZ TXgard-IS+ SO2-10ppm M20(Side) ATEX/IECEx
TIP-AL-AA-002-ZZ TXgard-IS+ NO2-10ppm M20(Top) UL/cUL
TIP-AL-AA-011-ZZ TXgard-IS+ NO2-10ppm M20(Top) ATEX/IECEx
TIP-AL-AB-011-ZZ TXgard-IS+ NO2-10ppm M20(Side) ATEX/IECEx
TIP-AN-AA-002-ZZ TXgard-IS+ Cl2-20ppm M20(Top) UL/cUL
TIP-AN-AA-011-ZZ TXgard-IS+ Cl2-20ppm M20(Top) ATEX/IECEx
TIP-AN-AB-011-ZZ TXgard-IS+ Cl2-20ppm M20(Side) ATEX/IECEx
TIP-AP-AA-011-ZZ TXgard-IS+ O3-1ppm M20(Top) ATEX/IECEx
TIP-AP-AB-011-ZZ TXgard-IS+ O3-1ppm M20(Side) ATEX/IECEx
TIP-AQ-AA-002-ZZ TXgard-IS+ HCN-25ppm M20(Top) UL/cUL
TIP-AQ-AA-011-ZZ TXgard-IS+ HCN-25ppm M20(Top) ATEX/IECEx
TIP-AQ-AB-002-ZZ TXgard-IS+ HCN-25ppm M20(Side) UL/cUL
TIP-AQ-AB-011-ZZ TXgard-IS+ HCN-25ppm M20(Side) ATEX/IECEx
TIP-AR-AA-011-ZZ TXgard-IS+ NH3-100ppm M20(Top) ATEX/IECEx
TIP-AR-AB-002-ZZ TXgard-IS+ NH3-100ppm M20(Side) UL/cUL
TIP-AR-AB-011-ZZ TXgard-IS+ NH3-100ppm M20(Side) ATEX/IECEx
TIP-AS-AA-002-ZZ TXgard-IS+ NH3-1000ppm M20(Top) UL/cUL
TIP-AS-AA-011-ZZ TXgard-IS+ NH3-1000ppm M20(Top) ATEX/IECEx
TIP-AS-AB-011-ZZ TXgard-IS+ NH3-1000ppm M20(Side) ATEX/IECEx
TIP-AV-AA-011-ZZ [L] TXgard-IS+ HF-10ppm M20(Top) ATEX/IECEx
TIP-AV-AB-011-ZZ [L] TXgard-IS+ HF-10ppm M20(Side) ATEX/IECEx
TIP-BB-AA-011-ZZ TXgard-IS+ COCl2-1ppm M20(Top) ATEX/IECEx
TIP-BB-AB-002-ZZ TXgard-IS+ COCl2-1ppm M20(Side) UL/cUL
TIP-BB-AB-011-ZZ TXgard-IS+ COCl2-1ppm M20(Side) ATEX/IECEx
TIP-CC-AA-002-ZZ TXgard-IS+ Cl2-5ppm M20(Top) UL/cUL
TIP-CC-AA-011-ZZ TXgard-IS+ Cl2-5ppm M20(Top) ATEX/IECEx
TIP-CC-AB-002-ZZ TXgard-IS+ Cl2-5ppm M20(Side) UL/cUL
TIP-CC-AB-011-ZZ TXgard-IS+ Cl2-5ppm M20(Side) ATEX/IECEx
TIP-CK-AA-011-ZZ TXgard-IS+ ClO2-1ppm M20(Top) ATEX/IECEx
TIP-IG-AA-002-ZZ TXgard-IS+ CO-250ppm M20(Top) UL/cUL
TIP-IG-AA-011-ZZ TXgard-IS+ CO-250ppm M20(Top) ATEX/IECEx
TIP-IG-AB-011-ZZ TXgard-IS+ CO-250ppm M20(Side) ATEX/IECEx
TIP-II-AA-002-ZZ TXgard-IS+ H2S-25ppm M20(Top) UL/cUL
TIP-II-AA-011-ZZ TXgard-IS+ H2S-25ppm M20(Top) ATEX/IECEx
TIP-II-AB-002-ZZ TXgard-IS+ H2S-25ppm M20(Side) UL/cUL
TIP-II-AB-011-ZZ TXgard-IS+ H2S-25ppm M20(Side) ATEX/IECEx
TIP-IL-AA-011-ZZ TXgard-IS+ H2S-50ppm M20(Top) ATEX/IECEx
TIP-IL-AB-011-ZZ TXgard-IS+ H2S-50ppm M20(Side) ATEX/IECEx
TIP-IN-AA-002-ZZ TXgard-IS+ H2S-200ppm M20(Top) UL/cUL
TIP-IN-AA-011-ZZ TXgard-IS+ H2S-200ppm M20(Top) ATEX/IECEx
TIP-IO-AB-002-ZZ TXgard-IS+ SO2-20ppm M20(Side) UL/cUL
TIP-IQ-AA-011-ZZ TXgard-IS+ SO2-30ppm M20(Top) ATEX/IECEx
TIP-IQ-AB-011-ZZ TXgard-IS+ SO2-30ppm M20(Side) ATEX/IECEx
TIP-IS-AA-011-ZZ TXgard-IS+ Cl2-10ppm M20(Top) ATEX/IECEx
TIP-IS-AB-011-ZZ TXgard-IS+ Cl2-10ppm M20(Side) ATEX/IECEx
TIP-IT-AA-011-ZZ TXgard-IS+ H2-2000ppm M20(Top) ATEX/IECEx
TIP-IT-AB-011-ZZ TXgard-IS+ H2-2000ppm M20(Side) ATEX/IECEx
TIP-IU-AA-011-ZZ TXgard-IS+ H2-50LEL M20(Top) ATEX/IECEx
TIP-IU-AB-011-ZZ TXgard-IS+ H2-50LEL M20(Side) ATEX/IECEx
TIP-IV-AA-002-ZZ TXgard-IS+ NH3-50ppm M20(Top) UL/cUL
TIP-IV-AA-011-ZZ TXgard-IS+ NH3-50ppm M20(Top) ATEX/IECEx
TIP-IV-AB-002-ZZ TXgard-IS+ NH3-50ppm M20(Side) UL/cUL
TIP-IV-AB-011-ZZ TXgard-IS+ NH3-50ppm M20(Side) ATEX/IECEx
TXgard-IS+ Accessories
C01338 Spray deflector. For outdoor installations & protection from water sprays.
C01339 Flow adaptor, for use in sampling applications.
00027D Stainless steel duct mounting plate – for GRP junction boxes. Maximum duct airflow: 6m/s. Use TXgard-IS+ detector with side-entry.
C03005 Calibration adaptor
M02025 Cable gland M20 nylon.
Spare Sensor Assemblies
S011185 ammonia (Sensoric), 0-1000ppm (-20C min.): for TXgard-IS, IS+
S01730 ammonia (Sensoric), 0-50ppm & 0-100ppm (-20C min): for TXgard-IS, IS+
S01171 carbon monoxide (CO-BF): for TXgard-IS, IS+
S01182 chlorine (City): for TXgard-IS (with 0-5ppm header, may also be used for 0-10ppm detectors provided the original header is retained), TXgard-IS+ (0-20ppm).
S011189 chlorine (Sensoric): for TXgard-IS (originalgain header within the amplifier must be retained) TXgard-IS+ (0-5, 10ppm )
S01900 chlorine dioxide (City): for TXgard-IS
S01642 ethylene oxide (City): for TXgard-IS
S01728 hydrogen chloride (Sensoric): for TXgard-IS
S01178 hydrogen cyanide (City): for TXgard-IS
S01729 hydrogen cyanide (Sensoric): for TXgard-IS, IS+
S01983 hydrogen fluoride (Sensoric): for TXgard-IS, IS+
S01176 hydrogen/Hi (City 3-Series): for TXgard-IS, IS+
S01177 hydrogen/Lo (City 7-Series): for TXgard-IS, IS+
S013000 hydrogen (Sensoric), 0-100% LEL: for TXgard-IS+
S011975 hydrogen sulphide (H2S-BH 0-50ppm): Low Range for TXgard-IS, IS+. Supplied with a 0-10ppm header for TXgard-IS.
S01170 hydrogen sulphide (H2S-B1 0-200ppm): High Range for TXgard-IS, IS+. Supplied with a 0-25ppm header for TXgard-IS.
S01174 nitric oxide (City): for TXgard-IS
S01175 nitrogen dioxide (City): for TXgard-IS, IS+
S012028 oxygen (7OX-V): for TXgard-IS+ 2009 onwards
S01186 ozone (City): for TXgard-IS
S011201 ozone (Sensoric): for TXgard-IS+
S01640 phosphine (City): for TXgard-IS, IS+
S011987 silane: for TXgard-IS
S01172 sulphur dioxide: for TXgard-IS, IS+
S011226 sulphur dioxide – hydrogen immune: for TXgard-IS
S01641 volatile organics (City): for TXgard-IS
S01343 Bayonet sensor housing for 3-pin 32mm diameter sensors: for TXgard-IS, IS+
TXgard-IS+ Spares
S011160/S Personality module for ozone or chlorine detectors
S01997/S Personality module for oxygen detectors (1 year C/2 sensor)
S011007 Terminal PCB (Base board)
Spares for ATEX certified detectors manufactured since October 2008 (detectors with part number TIP-**-**-011-**):
S011051 Terminal PCB (Base board)
S011050 Main/Display PCB
S012126/S Personality module for general toxic versions (Non Biased)
S012127/S Personality module for ozone or chlorine detectors (Non Biased)
S012128/S Personality module for hydrogen cyanide or phosgene detectors (Non Biased)
S011052/S Personality module for oxygen detectors (2 year 7OX-V sensor)
Spares for UL and cUL certified detectors manufactured since March 2009 (detectors with part number TIP-**-**-002 or 033-**):
S011224 Terminal PCB (Base board)
S011061 Main/Display PCB – UL version
General TXgard-IS+ spares to suit all models:
E01755 Front panel display/membrane label
M07214 Installation, Operating and Maintenance Manual

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