HomeGas AnalysersSafety › Crowcon Flamgard Plus and TXgard Plus


Crowcon Flamgard Plus and TXgard Plus


Reliable detection of flammable, toxic or oxygen gases with a local display and optional relays, is what the Crowcon Flamgard Plus and TXgard Plus range of detectors have been built for.

There are three different versions of these detectors, available to suit all requirements:

  Flamgard Plus - Exd - Flameproof flammable gas detector with local display and optional relays.

  TXgard Plus - Exd - Flameproof toxic or oxygen gas detector with local display and optional relays.

  TXgard-IS+ - I.S. - Intrinsically Safe toxic or oxygen gas detector with local display.

Low cost of ownership

  Non-intrusive one man calibration
  Long life sensors
  Simple parts replacement

Rugged and reliable

  TXgard Plus and Flamgard Plus are constructed using marine grade aluminium with a stainless steel sensor housing
  TXgard-IS+ is made from tough carbon loaded nylon
  Proven track record for operation in the harshest environments


Flexible output options

  4-20mA current sink or source
  2 or 3 wire formats
  Optional relays for alarm and fault

Wide range of sensors

  Choice of catalytic beads for a wide selection of flammable gases and vapours
  Extensive range of electrochemical sensors for toxic gases and oxygen


Data Sheet

Ordering Information


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: 6 metres per second. Use TXgard-IS+ detector with side-entry.
C03005 Calibration adaptor
M02025 Cable gland M20 Nylon.

TXgard-IS & TXgard-IS+ Spare Sensor Assemblies

S011185 NH3 (Sensoric), 0-1000 ppm (-20C min.): for TXgard-IS, IS+
S01730 NH3 (Sensoric), 0-50 ppm (-20C min): for TXgard-IS, IS+
S01181 NH3 (Bionics), sensor assembly: for TXgard-IS
C01187 NH3 (Bionics), sensor electrolyte: for TXgard-IS
M02096 NH3 (Bionics), sensor membrane: for TXgard-IS
S01984 B2 (Sensoric): for TXgard-IS
S01872 B2 (Bionics): for TXgard-IS
491/1 B2 (Bionics) sensor electrolyte: for TXgard-IS
S01171 CO (City): for TXgard-IS, IS+
S01182 CL2 (City): for TXgard-IS, IS+ 0-20ppm only)
S011189 CL2 (Sensoric): for TXgard-IS, IS+ (0-5, 10ppm )
S01900 CLO2 (City): for TXgard-IS
S01642 ETO (City): for TXgard-IS
S01187 F2 (Bionics): for TXgard-IS
C01235 F2 (Bionics) sensor electrolyte: for TXgard-IS
M02196 F2 (Bionics) sensor membrane: for TXgard-IS
S01728 HCL (Sensoric): for TXgard-IS
S01178 HCN (City): for TXgard-IS
S01729 HCN (Sensoric): for TXgard-IS, IS+
S01983 HF (Sensoric): for TXgard-IS, IS+
S01188 HF (Bionics): for TXgard-IS
M02197 HF (Bionics) membrane: for TXgard-IS
C01236 HF (Bionics) sensor electrolyte: for TXgard-IS
S01176 H2/Hi (City 3-Series) Hi: for TXgard-IS, IS+
S01177 H2/Lo (City 7-Series) Lo: for TXgard-IS, IS+
S013000 H2 3E 4%, 0-100% LEL: for TXgard-IS+
S01170 H2S (7H sensor): for TXgard-IS, IS+
S01174 NO (City): for TXgard-IS
S01175 NO2 (City): for TXgard-IS, IS+
S01169 O2 (C/2): for TXgard-IS, IS+
S012028 O2 (7OX-V): for TXgard-IS+ 2009 onwards
S01186 O3 (City) (Citi): for TXgard-IS
S011201 O3 (Sensoric) (Sensoric): for TXgard-IS+
S01640 PH3 (City): for TXgard-IS, IS+
S011987 SiH4: for TXgard-IS
S01172 SO2: for TXgard-IS, IS+
S011226 SO2 - hydrogen immune: for TXgard-IS
S01641 VO (City): for TXgard-IS
S01343 Bayonet sensor housing for 3-pin 32mm diameter sensors: for TXgard-IS, IS+

TXgard-IS+ Spares

S01999/S Personality module for general toxic versions
S011160/S Personality module for ozone or chlorine detectors
S011161/S Personality module for hydrogen cyanide or phosgene detectors
S01997/S Personality module for oxygen detectors (1 year C/2 sensor)
S011007 Terminal PCB (Base board)
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)
S011224 Terminal PCB (Base board)
S011223 Main/Display PCB
E01755 Front panel display/membrane label
M07214 Installation, Operating and Maintenance Manual

TXgard-IS+ I.S. Toxic and Oxygen Gas Detector With Display

TIP-01 carbon monoxide 0-250ppm , M20, top entry, ATEX/IECEx
TIP-02 carbon monoxide 0-500ppm , M20, top entry, ATEX/IECEx
TIP-03 chlorine 0-5ppm , M20, top entry, ATEX/IECEx
TIP-04 hydrogen sulphide 0-25ppm , M20 , top entry, ATEX/IECEx
TIP-05 hydrogen sulphide 0-50ppm , M20 , top entry, ATEX/IECEx
TIP-06 hydrogen sulphide 0-100ppm , M20 , top entry, ATEX/IECEx
TIP-07 oxygen 0-25% Vol. , M20, top entry, ATEX/IECEx
TIP-08 ozone 0-1ppm , M20, top entry, ATEX/IECEx

TXgard Plus Spares

C01697 Crowmag
M040013 Junction box lid O-Ring
S01866 Toxic gas amplifier, specify gas and range
S01867 oxygen amplifier
S01846/3 Analogue terminal board
S01847 Relay terminal board
S01892 Flamgard-Plus/Txgard-Plus junction box only (no label)
S01751 96HD/CO detector (spare)
S01750 96HD/HS detector (spare)
S01753 96HD/OX detector (spare)
S01752 96HD/AM detector (spare)
S01781 96HD replacement sinter
M01614 96HD sinter tool
S011182 Amplifier header: H2S 0-15ppm
S01855 Amplifier header: H2S 0-25ppm
S01856 Amplifier header: H2S 0-50ppm
S01977 Amplifier header: H2S 0-100ppm
S011156 Amplifier header: H2S 0-200ppm
S01857 Amplifier header: CO 0-100ppm
S01858 Amplifier header: CO 0-250ppm
S01859 Amplifier header: CO 0-500ppm
S011033 Amplifier header: CO 0-1000ppm
S01863/3 Amplifier header: O2 0-25%
S01891 TXgard Plus amplifier housing (includes mouldings, screws and labels, no PCB's)
S012124 96HD H2S detector head, ATEX markings only (no UL markings)

TXgard-Plus Exd Toxic and oxygen Gas Detector With Display

With relays

TXP-01 carbon monoxide 0-250ppm, relays, M20, ATEX
TXP-02 carbon monoxide 0-500ppm, relays, M20, ATEX
TXP-03 hydrogen sulphide 0-25ppm, relays, M20, ATEX
TXP-04 hydrogen sulphide 0-50ppm, relays, M20, ATEX
TXP-05 hydrogen sulphide 0-100ppm, relays, M20, ATEX
TXP-06 oxygen 0-25% vol, relays, M20, ATEX

Without relays

TXP-07 carbon monoxide 0-250ppm, no relays, M20, ATEX
TXP-08 carbon monoxide 0-500ppm, no relays, M20, ATEX
TXP-09 hydrogen sulphide 0-25ppm, no relays, M20, ATEX
TXP-10 hydrogen sulphide 0-50ppm, no relays, M20, ATEX
TXP-11 hydrogen sulphide 0-100ppm, no relays, M20, ATEX
TXP-12 oxygen 0-25% vol, no relays, M20, ATEX

Flamgard Plus Exd Flammable Gas Detector With Display

Analogue - No Relays

FLP/A/A 0-100% LEL with a VQ21T pellistor - gas types available methane, pentane, propane, butane, hexane, hydrogen, LPG, methanol, ethanol, propanol, ethylene, ethane, toluene, petrol vapour (unleaded) and carbon disulphide.
FLP/C/A 0-100% LEL with VQ8 pellistor for resistance to leaded petrol
FLP/G/A 0-100% LEL with VQ41 pellistor - ammonia (0-25%, 0-100% LEL) or jet fuel (0-100% LEL )
FLP/H/A 0-100% LEL with VQ1 pellistor - gas types available methane and acetylene†.

With Relays

FLP/A/R 0-100% LEL with VQ21T pellistor - gas types available methane, pentane, propane, butane, hexane, hydrogen, LPG, methanol, ethanol, propanol, ethylene, ethane, toluene, petrol vapour (unleaded) and carbon disulphide.
FLP/C/R 0-100% LEL with VQ8 pellistor for resistance to leaded petrol
FLP/G/R 0-100% LEL with VQ41 pellistor - ammonia (0-25%, 0-100% LEL) or jet fuel (0-100% LEL )
FLP/H/R 0-100% LEL with VQ1 pellistor - gas types available methane and acetylene†.
FLP-0077 Flamgard-Plus without sensor assembly, ATEX M20
FLP-0022 Flamgard-Plus without sensor assembly, with relays. ATEX M20
FLP-0069 Flamgard-Plus without sensor assembly UL 1/2"NPT
FLP-0041 Flamgard-Plus without sensor assembly, with relays. UL 1/2"NPT

Flamgard-Plus and TXgard Plus Gas Detector Accessories (to fit 96HD)

C01052 Spray deflector. For outdoor installations & protection from water sprays.
C01442 Weatherproof cap
C01051 Collector cone. For aiding detection of light gases such as methane.
C01254 Carbon cloth filter (self adhesive). Removes long-chain hydrocarbons.
C01688 Stainless steel flow adapter for 96HD
C03005 Calibration adaptor

ATEX Certified Exd Cable Gland Adaptors.

M02125 M20 to ½" NPT (for standard Xgard, Exe or Exd Crowcon junction box)
M02281 M20 to ¾" NPT (for standard Xgard, Exe or Exd Crowcon junction box)
M02354 Exd/Exe certified brass cable gland. M20 x 1.5mm thread, suitable for Steel Wire Armoured cables with outside diameter 15.5mm to 21.1mm (inner sheath 6.7mm to 14mm). Certified ATEX II 2 GD, Exd IIC/Exe II. Certified to ATEX, IECEx, CSA, GOST-R and NEPSI standards. IP66/67/68.

Flamgard Plus Spares

C01697 Crowmag
M040013 Junction box lid O-Ring
S011899 Flamgard Plus Amplifier with methane header (300P pellistor)
S011900 Flamgard Plus Amplifier with propane header
S011901 Flamgard Plus Amplifier with pentane header
S01865 Flamgard Plus Amplifier (no header) - specify gas
S01846/3 Analogue terminal board
S01847 Relay terminal board
S01892 Flamgard-Plus/TXgard-Plus junction box only (no label)
S01749/A 96HD/FL flammable gas detector (spare), fitted with 300P pellistor (replacement for VQ21T)
S01749/A/VQ21 96HD/FL flammable gas detector (spare), fitted with VQ21T pellistor
S01749/C 96HD/FL flammable gas detector (spare), fitted with VQ8 pellistor
S01749/G 96HD/FL flammable gas detector (spare), fitted with VQ41 pellistor
S01749/H 96HD/FL flammable gas detector (spare), fitted with VQ1 pellistor
S01637/A/M 96 HD/FL sensor element 300P pellistor
S01637/A/M/V 96 HD/FL sensor element VQ21T pellistor
S01637/C 96 HD/FL sensor element VQ8
S01637/G 96 HD/FL sensor element VQ41
S01637/H 96 HD/FL sensor element VQ1
S01781 96HD replacement sinter
S01853 Amplifier header: methane (300P pellistor)
S01854 Amplifier header: pentane (VQ21T pellistor)
S01962 Amplifier header: hydrogen (VQ21T pellistor)
S011020 Amplifier header: propane (VQ21T pellistor)
S01905/3 Amplifier header: methane (VQ21T pellistor)
Special spare detector heads
S012122 96HD flammable gas detector head (VQ21 pellistor), ATEX markings only (no UL markings)

Flamgard-Plus Exd Flammable Gas Detector with Display

With relays

FLP-01 Methane 0-100% LEL , Relays, M20, ATEX
FLP-02 Butane 0-100% LEL , Relays, M20, ATEX
FLP-03 Hydrogen 0-100% LEL , Relays, M20, ATEX
FLP-04 LPG 0-100% LEL , Relays, M20, ATEX
FLP-05 Propane 0-100% LEL , Relays, M20, ATEX

Without relays

FLP-06 Methane 0-100% LEL , No Relays, M20, ATEX
FLP-07 Butane 0-100% LEL , No Relays, M20, ATEX
FLP-08 Hydrogen 0-100% LEL , No Relays, M20, ATEX
FLP-09 LPG 0-100% LEL , No Relays, M20, ATEX
FLP-10 Propane 0-100% LEL , No Relays, M20, ATEX



Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

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