TXP/A/CO TXgard-Plus Toxic Gas Detector with Cromag, Analogue With Display No Relays, Carbon Monoxide 0-100, 250, 500, 1,000ppm by Crowcon
TXgard Plus is a Flameproof (Ex d), ATEX and UL 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.
Flexible output options
- 4-20mA current sink or source
- 2 or 3 wire formats
- Optional relays for alarm and fault
- Works with a wide selection of control panels
- Can be used for switching local alarms
Non-intrusive calibration
- Calibration can be performed locally without the need for hot work permits
- Local display and buttons enable calibration without opening the junction box
- Minimises operational down-time
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
- Gas detector tailored to your requirements
Low cost of ownership
- Non-intrusive one man calibration
- Long life sensors
- Simple parts replacement
- Easy to operate and maintain
- Keeps interuption to on-site activity to a minimum
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
- Ingress protection to IP65 as standard
- Proven track record for operation in the harshest environments
| Size | 200 x 115 x 115mm (7.9 x 6.1 x 6.1ins) |
| Weight | 2.2kg (4.9lbs) |
| Enclosure material | Junction box: Marine grade alloy Sensor housing: 316 stainless steel |
| Ingress Protection | IP65 |
| Cable entries | 2 x M20 or 1/2" NPT |
| Power | 10-30Vdc, 210mA max (relay version) 160mA max (non relay) |
| Operating temperatures | -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 | T90 <15 seconds typically |
| Hazardous area zones | Zone 1 or 2 |
| Approvals | Ex II 2 G Exd IIC T6 Gb UL Class I Zone 1 |
| EMC compliance | EN50270, FCC, ICES-003 |
| Gas Type | LTEL (ppm) |
STEL (ppm) |
Range Available |
| Ammonia (NH3) | 25 |
35 |
- |
| Carbon monoxide (CO) | 30 |
200 |
100, 250, 500, 1000ppm |
| Chlorine (CL2) | - |
0.5 |
- |
| Chlorine dioxide (CLO2) | 0.1 |
0.3 |
- |
| Hydrogen (H2) | - |
- |
- |
| Hydrogen cyanide (HCN) | - |
10 (MEL) |
- |
| Hydrogen fluoride (HF) | 1.8 |
3 |
- |
| Hydrogen sulphide (H2S) | 5 |
10 |
15, 20, 25, 50, 100, 200ppm |
| Nitrogen dioxide (NO2) | 1 |
1 |
- |
| Ozone (O3) | - |
0.2 |
- |
| Oxygen (O2) | - |
- |
25% |
| Phosgene (COCl2) | 0.02 |
0.06 |
- |
| Phosphine (PH3) | 0.1 |
0.2 |
- |
| Sulphur Dioxide (SO2) | 1 |
1 |
- |





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