TXgard Plus

TXgard Plus is a flameproof (Ex d), ATEX, IECEx certified toxic or oxygen gas detector with local LCD display. A choice of sensors are available enabling use in a wide range of applications, including water treatment, oil and gas exploration, chemical plants and steel production.

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Category: Fixed Gas Detectors Tags: Carbon Monoxide, Chlorine Dioxide, Tag: Hydrogen Sulphide, Tag: Oxygen

Non-intrusive calibration

Calibration can be performed locally without the need for hot work permits – minimises operational down-time
Local display and buttons enable calibration without opening the junction box

Flexible output options

4-20mA current sink or source – works with a wide selection of control panels
3 wire format
Optional relays for alarm and fault – can be used for switching local alarms

Rugged and reliable

Constructed using marine-grade aluminium with a stainless steel sensor housing – proven track record for providing reliable oxygen, toxic and flameproof gas detection, even in the harshest of environments
Ingress protection to IP65 as standard

Low cost of ownership

Non-intrusive one man calibration – easy to operate and maintain
Long life sensors – keeps interuption to on-site activity to a minimum
Simple parts replacement

Wide range of sensors

A range of carbon monoxide, hydrogen sulphate and oxygen electrochemical sensors available for toxic and oxygen gas detection

Specifications

Size	200 x 115 x 115mm (7.9 x 6.1 x 6.1ins)
Weight	2.2kg (4.9lbs)
Ingress protection	IP65
Enclosure material	Junction box: Marine grade alloy Sensor housing: 316 stainless steel
Power	10-30Vdc, 210mA max (relay version) 160mA max (non relay)
Cable entries	2 x M20 or 1/2” NPT
Operating temperature	-10°C to +55°C (-14°F to 131°F) *
Humidity	15 to 90% RH non-condensing
Relays (optional)	SPNO or SPNC contacts rated 30Vdc 1A (non-inductive load) for Alarm 1, Alarm 2, Fault
Display	3-digit LCD back-lit display, LED status indicator
Calibration method	Via magnetically operated buttons
Electrical output	3 wire 4-20mA, sink or source
Terminals	Suitable for up to 1.5mm2 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 1 or 2
Approvals	Ex II 2 G Ex db IIC T6 Tamb -20°C to +55°C
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

Gases and Ranges

Gas	Range Available
Carbon monoxide (CO)	100, 250, 500, 1000ppm
Hydrogen sulphide (H₂S)	25, 50, 100, 200ppm
Oxygen (O₂)	25% vol.

For a full list of gases download the datasheet or contact Crowcon.

Accessories

Below is a small selection of the accessories available for the TXgard Plus.

Spray deflector

C01052

For use outdoor installations and to protect from water sprays, for example in water treatment or food processing plants. For extremely wet environments eg: offshore installations, use weatherproof cap, CO1442, instead.

Weatherproof cap

C01442

For offshore or other extremely wet environments in place of spray deflector.

Stainless steel flow adaptor

C01688

For use where a gas sample is being piped to the detector.

Exd Cable Gland Adaptors

ATEX certified Exd cable gland adaptors.

Exd/Exe Certified Brass Cable gland

M02354

Suitable for Steel Wire Armoured cables with outside diameter 15.5mm to 21.1mm (inner sheath 6.7mm to 14mm). Certified to ATEX (ll 2DG, Exd llC/Exe ll), IECEx, CSA, GOST-R and NEPSI standards. M20 x 1.5mm thread. Ingress protection to IP66/67/68.