Toxic and oxygen gas detector TXgard+

  • Calibration can be performed locally without the need for hot work permits
  • Local display and magnetic key enable calibration without opening the junction box
  • 4...20mA signal is provided
  • Optional alarm and fault relays are available


TXgard-Plus is a flameproof toxic and oxygen gas detector suitable for use in zone 1 or 2 hazardous areas. It is designed to detect toxic gases and oxygen using a range of electrochemical sensors. 

A local display and magnetically operated switches allow non-intrusive one-man calibration without a hot work permit. 

Powered by 24 VDC (nominally) TXgard Plus provides a 4...20 mA signal (sink or source) proportional to the gas concentration and can also be fitted with optional alarm and fault relays. 


Protection class
IP65, IP66 with weatherproof cap
Cable entries
2 x M20 or 1/2”NPT
10...30VDC, 100 mA max (relay version).
50 mA max. (non relay)
Operation temperatures
-10 °C...+55 °C (14°F...131 °F)
15...90% RH non-condensing
Relays (optional)
SPNO or SPNC contacts rated 30Vdc 1A (non-inductive load)
3-digit LCD back-lit display, LED status indicator