Crowcon TXgard-IS+ Gas Detector

Single Gas & Multi-gas Detectors | Fixed Point Gas Detection & Portable Gas Safety Applications | Industrial Locations & Hazardous Area Zones

CategoryGas Detection
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Product Overview

Crowcon TXgard-IS+

Single Gas & Multi-gas Detectors | Fixed Point Gas Detection & Portable Gas Safety Applications | Industrial Locations & Hazardous Area Zones

Crowcon TXgard-IS+ | ATEX Zone 0, Zone 1 & Zone 2

TXgard-IS+ manufactured by Crowcon, is a fixed gas detector that is ATEX certified for use in Zone 0, Zone 1 or Zone 2 hazardous areas. The Crowcon TXgard-IS+ is intrinsically safe and is UL and cUL certified for gas detection in Division 1 or 2 hazardous areas.

Crowcon TXgard-IS+ has a wide selection of sensors including a number of catalytic beads for a wide selection of flammable gases and vapours as well as electrochemical sensors for toxic gases and oxygen.

The Crowcon TXgard-IS+ gas detector is easy to calibrate, maintenance and operation are simple and the long life sensors keep disruption to site to a minimum.

Crowcon TXgard-IS+ has an ingress protection to IP65 as a standard.

Key Features

  • Robust Construction – Crowcon TXgard-IS+ is constructed from tough carbon loaded nylon and an IP65 rating as standard.
  • Flexible Options – The TXgard-IS+ is available in 2 or 3 wire formats with a 40-20mA current sink or source. Relays for alarm and fault are also options.
  • Low Ownership Costs – Sensors are long life with simple part replacement making the gas detector easy to operate and maintain.
  • Calibration – The TXgard-IS+ can be calibrated with ease and boasts local display and buttons so the junction box doesn’t need to be opened. Non-intrusive one man calibration can be performed locally without the need for hot work permits.
  • Range of Sensors – This gas detector can be tailored to meet the user’s needs with a choice of catalytic beads for a wide selection of flammable gases and vapours and an extensive range of electrochemical sensors for toxic gases and oxygen.

Crowcon TXgard-IS+

Bump Testing And Calibration

Routine bump testing is recommended for the range of Crowcon fixed gas detectors prior to each use. Bump testing is a brief application of a gas to the sensor to invoke a prescribed reaction, ensuring the gas detector reacts as expected.

Bump testing provides a quick, easy and direct method of verifying gas detectors are performing as required and takes a lot less time than ‘zeroing’ the device.

The bump test is widely accepted as a suitable method of testing gas detection equipment.

Crowcon TXgard-IS+ Fixed Gas Detector | Gases And Ranges Detected

TXgard-IS+ detects an extensive range of toxic, flammable and oxygen gases:

Crowcon TXgard-IS+ Hazardous Area ATEX Certified Gas Detector

Hazardous Area Classification

Ex II 1 G Ex ia IIC T4 Ga
UL Class I, groups A, B, C and D

Crowcon TXgard-IS+ is an ATEX certified gas detector for use in Zone 0,1 or 2 hazardous areas – also UL and cUL certified for use in Division 1 or 2 hazardous areas.

Visit hazardous area gas detectors for explosion and flameproof gas monitoring and detection instruments with certification for potentially explosive atmospheres, including Zone 1 and Zone 2 (according to ATEX and IECEx) and Class/Division categories (according to North American standards).

Technical Specifications

CategoryGas Detection
Size160 x 123 x 92mm (6.3 x 4.8 x 4.5ins)
Weight0.7kg (1.5lbs)
Enclosure materialJunction box: Carbon loaded nylon Sensor housing: ABD Plastic
Ingress ProtectionIP65
Cable entries1 x M20 or 1/2” NPT with adaptor
Power8-32Vdc, 4-20mA loop-powered
Operating temperatures-20o C to +55o C (-4o F to 131o F) *
Humidity15 to 90% RH non-condensing
Relays (optional)N/A
Display2-Line, 16 character LCD
Calibration methodVia push-buttons
Electrical output2 wire 4-20mA
TerminalsSuitable for up to 2.5mm2 cable
Sensor typeElectrochemical
Repeatability+/- 2% FSD typically
Zero drift+/-2% FSD, 6 months typically
Response timeContact
Hazardous area zonesZone 0, 1 or 2 Division 1 or 2 (when connected via an isolation device)
ApprovalsEx II 1 G Ex ia IIC T4 Ga UL Class I, groups A, B, C and D
EMC complianceEN50270, FCC, ICES-003
Gas TypeLTEL (ppm)STEL (ppm)Crowcon TXgard-IS+ Range Available
NH3 Ammonia253550, 100, 1000ppm
CO Carbon monoxide30200250, 500ppm
CL2 Chlorine–0.55, 10, 20ppm
CLO2 Chlorine dioxide0.10.31 ppm
H2 Hydrogen––2000ppm, 50% LEL, 100% LEL
HCN Hydrogen cyanide–10 (MEL)25ppm
HF Hydrogen fluoride1.8310ppm
H2S Hydrogen sulphide51025, 50, 100, 200ppm
NO2 Nitrogen dioxide1110ppm
O3 Ozone–0.21ppm
O2 Oxygen–25% vol.
COCl2 Phosgene0.020.061ppm
PH3 Phosphine0.10.22ppm
SO2 Sulphur Dioxide1110, 20, 30ppm

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