Crowcon Flamgard Plus

Crowcon Detective+ Multi-Gas Temporary Area Monitor

The Crowcon Detective+ is a multi-gas temporary area monitor for use in turnaround/shutdown procedures, hot work maintenance, confined space entry work and many other utility, construction and oil and gas industry applications. Go solo or link together using Detective Net to form a perimeter, Detective+ gives a loud and clear alarm providing effective warning of gas hazards. The rugged, water and impact resistant design make Detective+ the ideal choice for your transportable gas detection needs.

Key Features:

  • Infrared sensors available – allows sampling of highly flammable gas levels and carbon dioxide. They are also unaffected by poisoning and have a very fast response time.
  • Built-in pump option – provides sampling versatility
  • Built-in display – provides clear information and allows identification of gas hazard

Find out more on our sister site Cadmus Products

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

Rugged, tripod design

  • Raised sensor apertures – prevents water ingress
  • Folding leg option – allows stacking for easier storage and transportation
  • IP65 specifications – for use in challenging environments
  • Triple leg design – Increases unit physical visibility and is the perfect height to allow 360 gas inlet

Loud and clear alarms

  • 25 Detective NET units or 12 Detective+ with cables can be networked together forming effective perimeter defense – Units on the network can be placed up to 100m from each other and if one alarms, all units on the network alarm.
  • Intelligent and flexible units sending an alarm flash faster – provides guarantee to the use that the unit is functioning properly and they are protected
  • Audible and visual confidence blip
  • Vivid red LED clusters for visual alarm
  • Multiple beacons – ensures 3600 visibility

Detective+ is now wireless.

Detective Wireless is a wireless module that gives you up to 100 meters range excluding the use of cables.

The Detective Wireless modules can also be used as a repeater giving you a stronger signal in those areas that are built up and that have issues with signal strength.

Detective Wireless is backwards compatible enabling use with all version of Detective and Detective+, so it can be used on your existing fleet. Find out more.

Size 640 x 455 x 455mm (25.2 x 17.9 x 17.9ins)
Weight 7.5kg (19lbs)
Alarms Three large, top mounted red LED clusters and a single red LED on front panel.
Alarm mode: LED clusters flash in quick succession. LED clusters of linked Detectives repeating the alarm, flash
slower than LED lights on those Detectives sensing the hazard
Normal working: Slow flashing green LED
Battery low: Rapid flashing green LED
Wailing alarm, omni-direction siren, 104 dBA at 1m
Display High contrast LCD with back light. Values and units for up to 4 gases displayed simultaneously at current, TWA or peak levels, low battery, real time and elapsed time calibration and configuration data also displayed.
Data logging 125hrs at 10-second intervals (45,000 logs)
Event logging Alarm, over range, calibration, bump, on/off, TWA, 1000 events
Battery Standard 6V, 7.2Ah, sealed lead acid battery pack
Optional 6V, 12Ah high capacity pack
Up to 36 hours with flammable/ CO2 sensor fitted with 7.2Ah battery
Up to 60 hours with optional 12Ah battery pack
Typical response times Methane 20s, oxygen 10s, typical toxic gas 20s, IR 20s
Operating temperature -20°C to +50°C (-4°F to 122°F)*
Expected sensor life Flammable 5 years, toxic 3 years (typical), oxygen 2 years minimum, IR>5 years
Humidity 15-95% RH non-condensing
EMC Directive 2014/30/EU EN50270
Ingress protection IP65
Approvals Europe: ATEX II 2G Ex ib d IIC T4 (Tamb -20°C to +50°C)
International: IECEx Ex ib d IIC T4 (Tamb -20°C to +50°C)
Standards EN50014, EN50018, EN50020, EN50104, EN45544, IEC60079-0/-1 IEC60079-11
PC Interface Via RS232 lead. Portables PC software can be used to set alarms, clock, datalogging interval and password, manages datalogging giving graphical display of instrument log file and allows to export to spreadsheet.
Calibration Quick calibration using internal menu command, Portables PC
Accessories Baffle plate, interconnecting leads, RS232 communications lead, Detective NET
Sampling Internal electric sampling pump option, manual aspiration
Linked Detectives With cable connection, up to 12 units can be linked to provide perimeter or area monitoring
Crowcon Connect Compatible? No

**Toxic and Oxygen sensors RH Specifications vary, consult Crowcon for specific operating humidities

Required ranges and alarms may vary by country and application and these can be configured as required.

Gas Range Typical Alarms
Flammable gas  0-100 LEL 20% LEL
Oxygen (O2)  0-25%  19% & 23%
Hydrogen sulphide (H2S)  0-50 ppm 10 ppm
Carbon monoxide (CO)  0-500 ppm 30 ppm
Sulphur dioxide (SO2)  0-10 ppm  2 ppm
Chlorine (Cl2)  0-5 ppm  0.5 ppm
Nitrogen dioxide (NO2)  0-10 ppm  2 ppm
Phosphine (PH3) 0-5 ppm  0.5 ppm
Ammonia (NH3)  0-50 ppm  25 ppm
 Ammonia (NH3)  0-1000 ppm n/a
Hydrogen (non-flammable levels)  0-2000 ppm n/a
Hydrogen cyanide (HCN)  0-25ppm  10ppm
Hydrogen chloride (HCl)*/+  0-10 ppm  5ppm
Chlorine dioxide (ClO2)+  0-1 ppm  0.1 ppm
Hydrogen fluoride (HF)+  0-10 ppm  1 ppm
Ethylene oxide (C2H4O)*  0-10 ppm  5 ppm
Volatile organic*/+ 1-100 ppm n/a

* One biased sensor per Detective+

+ Reactive gas, care required during sampling, contact Crowcon
for details.

Infrared (IR) sensors for flammable gas can be supplied as a single range, 0-100% LEL, utlising a single display channel, or as a dual range, 0-100% LEL/0-100% volume, which then occupies two display channels.

Carbon dioxide sensors are supplied as 0-5% volume. Only one IR sensor can be fitted, and IR sensors can only be used in combination with oxygen and toxic sensors.

Gas Range Typical Alarms
Flammable gas  0-100 LEL 20% LEL
Flammable gas  0-100% v/v  None
Available for methane, propane, butane or ethylene
Carbon dioxide (CO2)  0 to 5% v/v 0.5 and 1.5% v/v



Detective Plus

DSU-01-XX-R 4 gas - CH4 % LEL, O2, H2S, CO (H2 filtered)non-pumped, standard battery with rigid legs
DEU-01-XX-R 4 gas - CH4 % LEL, O2, H2S, CO (H2 filtered) non-pumped, extended battery with rigid legs
DSU-02-XX-R 3 gas - CH4 % LEL, O2, H2S non-pumped, standard battery with rigid legs
DEU-02-XX-R 3 gas - CH4 % LEL, O2, H2S non-pumped, extended battery with rigid legs
DSU-03-XX-R 3 gas - CH4 % LEL, O2, CO non-pumped, standard battery with rigid legs
DEU-03-XX-R 3 gas - CH4 % LEL, O2, CO non-pumped, extended battery with rigid legs
DSU-04-XX-R 2 gas - CH4 % LEL, O2 non-pumped, standard battery with rigid legs
DEU-04-XX-R 2 gas - CH4 % LEL, O2 non-pumped, extended battery with rigid legs
DSU-05-XX-R 1 gas - CH4 % LEL non-pumped, standard battery with rigid legs
DEU-06-XX-R 1 gas - CH4 % LEL non-pumped, extended battery with rigid legs

Detective Plus IR

DSU-07-XX-R 4 gas - Flam IR CH4 0-100% LEL, O2, H2S,CO (H2 filtered) non-pumped, standard battery with rigid legs
DSU-08-XX-R 2 gas - Flam IR CH4 0-100% LEL, O2 non-pumped, standard battery with rigid legs

Detective Plus Accessories

C01325 Baffle plate to protect sensor apertures
C011033 Detective plus water trap
E07394 Computer lead assembly
E070010 Inter-connecting lead, 10m (M to M connection)
E070011 Inter-connecting lead, 20m (F to M connection)
E070012 Inter-connecting lead, 20m (M to M connection)
C02097 USB to RS232 adapter
C01832 Portables PC software CD

Detective Plus Spares

E07390 Charging lead (no plug)
C03464 EU charging lead
C03465 US charging lead
C03466 UK charging lead
E07391 Charging socket
M01540 Charger socket cover
M04383 Gasket for charger socket cover (minimum order quantity 10)
M03334 Grub screw for charger socket cover (minimum order quantity 10)
S012078 Detective Plus interface socket
S012079 Detective Plus computer socket
M04961 Moulded socket cover (interconnect and computer sockets)
M04398 Retaining strap for socket covers (minimum order quantity 10)
M03405 Retaining strap fastener (minimum order quantity 10)
S01326/3 Main PCB
M01893 Main PCB chassis
S011392/E Display PCB ATEX English
S011392/F Display PCB ATEX French
S011392/D Display PCB ATEX Dutch
E07064 Display PCB loom
M01512 Flow adapter recess strip
M03800 Flow adapter recess strip screw
S011981 Detective Plus float chamber assembly
C011050 Calibration adaptor
S011997 DTV+ lower case assembly repair kit
S011998 DTV+upper case assembly repair kit
M04906 Case lower
M04905 Case upper
M03723 Case retaining bolt
M04329 Top gasket sealing strip (per meter)
M04114 Inner gasket tape (per meter)
M041129 New case gasket, improved sealing compared to tape
M01441 Pipe adaptor (trained service centers only)
M04289 Lamp cover
M04315 Lamp cover retainer
E01718 Membrane switch/label, Detective Plus
E01924 Membrane switch/label, Detective Plus IR
M05478 Top label protective film (minimum order quantity 4)
M05972 Detective Plus label set (replacement only - serial number must be given at time of order)
M05493 Detective Plus charger interface label
S01266 Sensor blanking plug
E01956 Banshee sounder (grey)
E01992 E2S Sounder (red)
M04991 Banshee sounder muting cover
M04992 E2S sounder muting cover
S011969 Pump assembly (spare only)
S012000/2 LED cluster (single)�
E07972 Lamp connection lead�
E07065 LED loom
M04907 Lamp cover
M03336 Lamp cover retaining bolts
M04956 Lamp cover bolt washer
M03624 M8 lock nut (minimum order quantity 10)
S011951 Battery pack 7.2Ahr 36 hour
S011989 Battery pack 12Ahr 60 hour
S011988 36hr battery upgrade kit
S011990 60hr battery upgrade kit
M04596 Lamp cover seal (16mm rubber bung)
C011051 Tool kit
M07665 Detective Plus manual French
M07666 Detective Plus manual Dutch
M07674 Detective Plus manual Spanish
M07663 Detective Plus IR manual English
M07667 Detective Plus IR manual French
M07668 Detective Plus IR manual Dutch

Rigid Frame Units

M04013 Detective Plus metal frame assembly (includes legs, handle and plate)
M04381 Saddle washer
M03670 Button head bolt, M6 x 30 (minimum order quantity 10)
M03437 Washer (minimum order quantity 10)
M03442 Shakeproof washer (minimum order quantity 10)
M04387 Tube end round (minimum order quantity 10)

Folding Frame Units

S011970 Leg assembly
M03670 Leg hinge bolt (minimum order quantity 10)
M04901 Frame support bracket
M01890 Handle
M04904 Handle grip
M04902 Top retainer
M03801 Top retainer fixing screw (minimum order quantity 10)
M03415 Screw M6 x 3/8 Pozi pan self tapper (minimum order quantity 10)

Trained service centre only

E01066 Fuse 62MA I.S. encapsulated
DE0104 Fuse 100MA encapsulated
E01120 Fuse 250MA encapsulated
E01118 Fuse 375MA encapsulated

Detective Plus Sensor Modules

S011375/AA 0-100% LEL methane
S011375/AB 0-100% LEL propane
S011375/AC 0-100% LEL pentane
S011375/AD 0-100% LEL butane
S011375/AE 0-100% LEL ethylene
S011375/AF 0-100% LEL hydrogen
S011375/USA 0-100% LEL flammable gas (USA alarms UL approval specify calibration)
S011375/KDF 0-100% LEL flammable gas (AUS alarms specify calibration)
S011957 0-100% LEL methane for dual range % LEL/% vol. units
S01423 0-100% vol. methane for dual range % LEL/% vol. units
S01852†† 0-100% LEL jet fuel vapour (limited availability - check prior to quotation)
S011371 0-25% oxygen - 2 year sensor
S011368†† 0-500ppm carbon monoxide (H2 compensated)
S01240 0-50ppm hydrogen sulphide
S01240/USA 0-50ppm hydrogen sulphide (US Alarms, UL approval)
S01240/KDF 0-50ppm hydrogen sulphide (AUS alarms)
S011219 0-10ppm sulphur dioxide (hydrogen sulphide immune)
S01250 0-2000ppm hydrogen
S011363 0-100ppm nitric oxide
S01244 0-10ppm nitrogen dioxide†
S012040 0-5ppm chlorine† (UK alarm levels)
S01829 0-5ppm chlorine†
S011369 0-10ppm hydrogen chloride†/††
S01725 0-25ppm hydrogen cyanide
S01726 0-50ppm ammonia
S011848 0-1000ppm ammonia
S01871 0-1ppm chlorine dioxide†
S012042 0-2ppm phosphine† UK alarm levels
S011045 0-1000ppm hydrogen sulphide
S01252 0-2ppm phosphine†
S011992 0-1ppm arsine
S011367 0-100ppm volatile organics††
S011366 0-10ppm ethylene oxide††
S01832 0-10ppm hydrogen fluoride†
S011966 0-10ppm fluorine†
S011971 0-4% hydrogen electrochemical0-4% hydrogen electrochemical
S011474 Screw fixing kit

Detective Plus IR Sensor Modules

S011316/U 0-100% LEL methane IR (UL)
S011316/A 0-100% LEL methane IR (ATEX)
S011317/U Dual range 0-100% LEL and 0-100% vol. methane IR (UL)
S011317/A Dual range 0-100% LEL and 0-100% vol. methane IR (ATEX)
S011318 0-100% LEL propane
S011319 Dual range 0-100% LEL and 0-100% vol. propane IR
S011320 0-100% LEL butane IR
S011321 Dual range 0-100% LEL and 0-100% vol. butane IR
S011322 0-100% LEL ethylene IR
S011323 Dual range 0-100% LEL and 0-100% vol. ethylene IR
S011790 0-100% LEL acetylene IR
S011792 Dual range 0-100% LEL and 0-100% vol. acetylene IR
S011389 0-5% vol. carbon dioxide

Detective Net

C01360 � Detective NET�433MHz (comes with 0.7M of cable)
C01360-1 Detective NET 433MHz (comes with 0.7M of cable - when sold with a Detective+)